IBR-FaultScreen demo: IEEE 39-bus, 5,000 fault scenarios

Summary

High risk: 1797 of 5000 scenarios (36%) are RISKY.

RISKY scenarios1797 of 5000

OK scenarios3203

Unresolved (detailed study)400

Verified by simulation5000 of 5000

Riskiest fault locations: bus 6 (78% of 172), bus 16 (69% of 173), bus 19 (67% of 172).

Top risks:

S00069: fault at bus 23, cleared in 299.9 ms with 1 IBR(s). angle_separation: rotor-angle spread exceeded 180 deg at t = 1.365 s
S01042: fault at bus 7, cleared in 299.9 ms with 4 IBR(s). bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded…
S00987: fault at bus 4, cleared in 299.8 ms with 3 IBR(s). angle_separation: rotor-angle spread exceeded 180 deg at t = 1.447 s
S01389: fault at bus 22, cleared in 299.8 ms with 2 IBR(s). bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded…
S01759: fault at bus 10, cleared in 299.7 ms with 3 IBR(s). bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded…

What to study next: run detailed studies (commercial RMS and, where IBRs are close to the fault or the SCR is low, EMT) for the top-ranked scenarios and every "unresolved" one.

Network map

Each bus is shaded by the share of faults at that bus that were RISKY. Squares are generator buses; a teal outline marks an IBR's high-side bus in at least one scenario; a pulsing ring marks buses where at least 60% of faults were RISKY. Click or tap a bus for details. Press Play to watch risk grow as more synchronous machines are replaced by IBRs.

Scenarios with at most 4 IBR(s)

Select a bus to see its results.

0–20%20–40%40–60%60–80%80–100%no faults sampledgenerator busIBR high-side bus

Ranked scenarios

Riskiest first. "Source" says whether the verdict comes from a simulation or only from the classifier. IBRs are listed as generator:type@terminal bus. Click a column title to sort; click a scenario name to see its trajectories.

Download table (CSV)

Showing the 500 highest-ranked of 5000; the CSV download has all of them.

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S00069	RISKY	simulated	23	300	9:solar	13	0.892	1.07	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.365 s
S01042	RISKY (confirmed)	simulated	7	300	4:solar7:solar8:solar9:solar	39.3	0.803	1.02	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.466 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.300 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.300 s) Time step reduced to zero. Convergence is not likely. (t = 1.300 s)
S00987	RISKY	simulated	4	300	4:solar5:bess9:solar	32.7	0.86	0.951	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.447 s
S01389	RISKY (confirmed)	simulated	22	300	1:solar4:solar	18.5	2.6	1.04	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.398 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.300 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.300 s) Time step reduced to zero. Convergence is not likely. (t = 1.300 s)
S01759	RISKY (confirmed)	simulated	10	300	4:solar5:solar7:bess	29.5	1.81	1.03	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.366 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.300 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.300 s) Time step reduced to zero. Convergence is not likely. (t = 1.300 s)
S02077	RISKY	simulated	11	300	3:bess6:bess	24	3.2	1.03	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.529 s
S02362	RISKY (confirmed)	simulated	19	300	2:solar4:solar7:solar	31.9	2.46	0.925	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.446 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.045 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.044 s) Time step reduced to zero. Convergence is not likely. (t = 1.044 s) frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.559 Hz
S04609	RISKY	simulated	9	299	1:solar2:solar5:solar7:bess	36.8	2.53	0.966	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.217 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.217 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04959	RISKY (confirmed)	simulated	20	299	3:solar4:solar7:solar8:solar	38.7	2.38	0.9	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.00 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.00 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.500 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.299 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.299 s) Time step reduced to zero. Convergence is not likely. (t = 1.299 s) frequency: nadir below 59 Hz; nadir 58.279 Hz, zenith 60.268 Hz
S03341	RISKY	simulated	23	299	none	0		0.97	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.400 s
S03375	RISKY	simulated	11	299	1:bess5:bess6:bess9:solar	40.6	0.813	1.02	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.365 s
S04969	RISKY	simulated	20	299	6:bess	11.7	3.27	0.975	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.430 s; retried with step 0.00208 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.430 s; retried with step 0.00208 s frequency: nadir below 59 Hz; nadir 58.870 Hz, zenith 60.518 Hz
S00315	RISKY (confirmed)	simulated	14	299	6:bess7:bess8:solar	27	2.3	0.94	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.599 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.153 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.153 s) Time step reduced to zero. Convergence is not likely. (t = 1.153 s)
S02047	RISKY (confirmed)	simulated	5	299	1:solar2:solar7:bess	28.2	3.3	0.954	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.465 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.299 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.299 s) Time step reduced to zero. Convergence is not likely. (t = 1.299 s)
S00464	RISKY	simulated	14	299	6:solar	11.7	3.27	1	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.415 s
S04597	RISKY	simulated	5	299	none	0		0.93	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.398 s
S01957	RISKY	simulated	14	299	9:solar	13	0.892	0.978	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.431 s
S01140	RISKY (unresolved)	simulated	19	298	5:solar7:solar8:solar	23.9	2.58	0.931	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.013 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.013 s) Time step reduced to zero. Convergence is not likely. (t = 1.013 s)
S01454	RISKY	simulated	18	298	2:solar7:solar	20.8	3.39	0.984	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.550 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.550 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04995	RISKY	simulated	15	298	3:solar5:bess6:solar	32.6	2.54	0.937	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.300 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.300 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03329	RISKY (confirmed)	simulated	25	298	1:solar4:solar5:solar	27.1	1.87	0.939	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.15 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.15 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.167 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.298 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.298 s) Time step reduced to zero. Convergence is not likely. (t = 1.298 s)
S04045	RISKY (confirmed)	simulated	16	298	4:solar	11.1	2.68	1.03	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.06 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.06 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.379 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.298 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.298 s) Time step reduced to zero. Convergence is not likely. (t = 1.298 s)
S04647	RISKY	simulated	27	298	9:solar	13	0.892	0.924	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.033 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.033 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02270	RISKY	simulated	7	298	2:solar7:solar	20.8	3.39	0.965	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.999 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.999 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03435	RISKY	simulated	17	298	3:solar4:solar	23.4	2.61	1	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.483 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.483 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.917 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04470	RISKY	simulated	21	298	none	0		1.04	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.480 s
S01238	RISKY (confirmed)	simulated	22	298	1:solar3:solar5:solar	28.3	2.6	1.1	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.429 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.298 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.298 s) Time step reduced to zero. Convergence is not likely. (t = 1.298 s)
S02314	RISKY	simulated	3	298	7:bess	9.8	3.44	1.04	ride_through:PRC-029-1_Table2_voltage: REG_BESS_7 (bus 23) voltage in (1.1, 1.2] for 1.367 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_7 (bus 23) voltage in (1.1, 1.2] for 1.367 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03093	RISKY	simulated	21	298	2:solar6:solar8:solar9:solar	41	0.819	1.07	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.067 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.067 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00518	RISKY	simulated	4	298	5:bess	8.6	2.67	0.969	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.446 s
S02588	RISKY	simulated	16	298	6:bess	11.7	3.27	1.01	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.404 s
S03446	RISKY	simulated	23	297	2:solar8:bess	16.4	4.61	0.949	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.419 s
S02697	RISKY (confirmed)	simulated	19	297	2:solar4:solar	22	2.64	0.9	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.453 s; retried with step 0.00833 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.048 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.047 s) Time step reduced to zero. Convergence is not likely. (t = 1.047 s) frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.460 Hz
S04471	RISKY (confirmed)	simulated	10	297	none	0		1.04	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.363 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.297 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.297 s) Time step reduced to zero. Convergence is not likely. (t = 1.297 s)
S01805	RISKY	simulated	23	297	5:solar	8.6	2.67	1.03	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.376 s
S03358	RISKY	simulated	5	297	none	0		1.07	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.380 s
S02561	RISKY	simulated	25	297	4:solar5:bess	19.7	1.91	0.96	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.400 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.400 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03114	RISKY	simulated	27	297	5:solar7:bess9:solar	31.4	0.873	1.08	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.033 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.033 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01581	RISKY (unresolved)	simulated	19	297	5:bess6:solar7:solar	30.1	2.27	1.05	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.009 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.009 s) Time step reduced to zero. Convergence is not likely. (t = 1.009 s)
S03343	RISKY	simulated	1	297	1:solar8:solar9:bess	25.8	0.774	1.08	ride_through:PRC-029-1_Table2_voltage: REG_BESS_9 (bus 29) voltage in (1.2, 9.99) for 0.016 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_9 (bus 29) voltage in (1.2, 9.99) for 0.016 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01257	RISKY	simulated	13	297	4:solar7:solar	20.9	2.51	0.97	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.396 s
S00131	RISKY (confirmed)	simulated	19	296	1:solar	7.4	4.87	1.03	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.462 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.102 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.415 s failed with step 0.00833 s: non-physical solution: voltage magnitude -0.102 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.413 s non-physical solution: voltage magnitude -0.102 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.401 s
S01517	RISKY	simulated	20	296	6:solar	11.7	3.27	0.993	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.438 s; retried with step 0.00833 s
S03902	RISKY	simulated	11	296	8:bess	5.5	4.68	0.911	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.412 s
S03252	RISKY	simulated	14	296	4:solar	11.1	2.68	0.991	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.427 s
S01936	RISKY	simulated	13	296	9:bess	13	0.892	1.09	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.362 s
S02230	RISKY	simulated	15	296	1:solar5:solar6:bess7:solar	37.5	2.16	1.09	frequency: zenith above 61 Hz; nadir 59.783 Hz, zenith 61.005 Hz
S02247	RISKY	simulated	13	296	none	0		0.914	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.412 s
S03968	RISKY	simulated	21	296	none	0		1.09	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.445 s
S03846	RISKY	simulated	5	296	7:solar	9.8	3.44	0.998	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.395 s
S04437	RISKY (confirmed)	simulated	5	296	3:solar9:bess	25.3	0.883	0.975	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.595 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.296 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.296 s) Time step reduced to zero. Convergence is not likely. (t = 1.296 s)
S03595	RISKY	simulated	19	296	2:solar3:solar	23.3	4.03	1.07	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.401 s
S02595	RISKY (unresolved)	simulated	25	296	1:bess2:solar7:solar	28.2	3.3	1.04	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.296 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.296 s) Time step reduced to zero. Convergence is not likely. (t = 1.296 s)
S00078	RISKY (unresolved)	simulated	25	295	1:bess	7.4	4.87	1.01	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.295 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.295 s) Time step reduced to zero. Convergence is not likely. (t = 1.295 s)
S01849	RISKY	simulated	21	295	4:bess	11.1	2.68	1.03	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.525 s
S01375	RISKY	simulated	4	295	1:solar5:solar7:bess9:solar	38.8	0.818	1.02	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.418 s
S02794	RISKY	simulated	21	295	4:solar5:solar6:bess	31.4	1.78	0.951	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.2, 9.99) for 0.013 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.2, 9.99) for 0.013 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00802	RISKY	simulated	24	295	1:solar	7.4	4.87	0.937	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_1 (bus 2) voltage in (1.1, 1.2] for 1.417 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_1 (bus 2) voltage in (1.1, 1.2] for 1.417 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02715	RISKY (confirmed)	simulated	6	295	3:solar4:bess8:solar9:solar	41.8	0.809	0.93	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.561 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.050 pu at bus 8 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.389 s failed with step 0.00833 s: non-physical solution: voltage magnitude -0.050 pu at bus 8 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.385 s non-physical solution: voltage magnitude -0.050 pu at bus 8 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.372 s
S04685	RISKY	simulated	7	295	3:solar5:bess8:solar9:solar	39.4	0.83	0.933	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.100 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.100 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03946	RISKY	simulated	8	295	3:bess5:solar8:solar	26.4	2.62	1.07	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.472 s
S02679	RISKY (confirmed)	simulated	16	295	1:solar2:solar	18.3	4.76	1.1	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.07 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.07 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.374 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.295 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.295 s) Time step reduced to zero. Convergence is not likely. (t = 1.295 s)
S01141	RISKY	simulated	27	295	3:solar5:solar6:bess9:solar	45.6	0.856	0.93	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.066 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.066 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00956	RISKY (confirmed)	simulated	28	294	6:solar9:bess	24.6	0.875	1.01	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.03 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.03 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_BESS_9 (bus 29) voltage in (1.2, 9.99) for 0.077 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.294 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.294 s) Time step reduced to zero. Convergence is not likely. (t = 1.294 s)
S01429	RISKY (confirmed)	simulated	16	294	2:bess	11	5.4	0.988	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.18 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.18 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.503 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.294 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.294 s) Time step reduced to zero. Convergence is not likely. (t = 1.294 s)
S00520	RISKY	simulated	8	294	1:bess2:solar3:solar	30.7	3.82	0.918	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.2, 9.99) for 0.033 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.2, 9.99) for 0.033 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.2, 9.99) for 0.049 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03973	RISKY (unresolved)	simulated	26	294	9:solar	13	0.892	0.935	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) Time step reduced to zero. Convergence is not likely. (t = 1.000 s)
S02118	RISKY	simulated	17	294	1:solar2:solar4:solar	29.4	2.55	0.971	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.783 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.783 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 2.150 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02226	RISKY	simulated	24	294	6:bess9:solar	24.6	0.875	0.903	ride_through:PRC-029-1_Table2_voltage: REG_BESS_6 (bus 22) voltage in (1.1, 1.2] for 1.832 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_6 (bus 22) voltage in (1.1, 1.2] for 1.832 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.1, 1.2] for 1.096 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00308	RISKY	simulated	13	294	2:solar4:solar	22	2.64	1.03	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.368 s
S00476	RISKY	simulated	18	294	3:solar5:solar7:solar	30.8	2.56	0.945	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.300 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.300 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04532	RISKY	simulated	20	294	none	0		0.996	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.435 s; retried with step 0.00833 s
S04669	RISKY (confirmed)	simulated	14	294	2:bess3:solar6:solar9:bess	47.9	0.852	0.91	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.2, 9.99) for 0.017 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.294 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.294 s) Time step reduced to zero. Convergence is not likely. (t = 1.294 s)
S02817	RISKY	simulated	27	294	2:bess	11	5.4	0.988	ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.367 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.367 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01287	RISKY	simulated	18	294	1:solar2:solar4:solar9:solar	42.4	0.806	0.983	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.700 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.700 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.883 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00232	RISKY (confirmed)	simulated	17	294	3:solar5:solar9:bess	33.9	0.877	1	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.06 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.06 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.600 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.294 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.294 s) Time step reduced to zero. Convergence is not likely. (t = 1.294 s)
S02140	RISKY (confirmed)	simulated	22	294	3:solar	12.3	4.58	1.06	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.454 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.294 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.294 s) Time step reduced to zero. Convergence is not likely. (t = 1.294 s)
S04407	RISKY (unresolved)	simulated	22	294	7:solar8:bess	15.3	3.39	0.93	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.13 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.13 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: non-physical solution: bus 22 held at 0 V for 0.15 s after clearing (false voltage collapse) (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.524 s failed with step 0.00833 s: non-physical solution: bus 22 held at 0 V for 0.16 s after clearing (false voltage collapse) (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.518 s non-physical solution: bus 22 held at 0 V for 0.16 s after clearing (false voltage collapse) (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.508 s
S04593	RISKY	simulated	23	294	1:solar4:solar5:solar9:solar	40.1	0.801	0.991	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.410 s
S04759	RISKY (confirmed)	simulated	5	293	3:bess5:solar9:solar	33.9	0.877	1.08	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.440 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.293 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.293 s) Time step reduced to zero. Convergence is not likely. (t = 1.293 s)
S00864	RISKY	simulated	21	293	4:solar6:solar7:solar9:bess	45.5	0.808	1.05	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.2, 9.99) for 0.017 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.2, 9.99) for 0.017 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_6 (bus 22) voltage in (1.2, 9.99) for 0.066 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_7 (bus 23) voltage in (1.2, 9.99) for 0.066 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_BESS_9 (bus 29) voltage in (1.2, 9.99) for 0.017 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02531	RISKY (confirmed)	simulated	10	293	1:solar2:solar4:solar5:solar	38	1.84	1.01	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.365 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.293 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.293 s) Time step reduced to zero. Convergence is not likely. (t = 1.293 s)
S01569	RISKY	simulated	23	293	1:solar5:solar6:solar	27.7	2.53	1.1	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.359 s
S03193	RISKY	simulated	23	293	none	0		0.925	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.443 s
S03521	RISKY	simulated	3	293	5:solar8:bess9:solar	27	0.842	1.05	frequency: zenith above 61 Hz; nadir 59.657 Hz, zenith 61.183 Hz
S03699	RISKY	simulated	20	293	1:solar2:solar3:solar8:solar	36.1	3.39	0.911	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.492 s; retried with step 0.00833 s
S03765	RISKY	simulated	13	293	4:solar5:bess	19.7	1.91	0.954	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.392 s
S04480	RISKY (confirmed)	simulated	29	293	6:bess7:bess8:solar9:solar	39.9	0.796	1.08	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.08 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.08 pu is already RISKY: voltage_recovery: slowest bus 26: never recovers to reach 0.8 pu (limit 1 s) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.012 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.293 s) Time step reduced to zero. Convergence is not likely. (t = 1.012 s) frequency: nadir below 59 Hz; zenith above 61 Hz; nadir 58.149 Hz, zenith 61.181 Hz ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in [0, 0.1) for 4.967 s > 0.32 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02477	RISKY (confirmed)	simulated	5	292	1:solar2:bess4:solar9:bess	42.4	0.806	0.929	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.507 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.292 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.292 s) Time step reduced to zero. Convergence is not likely. (t = 1.292 s)
S03824	RISKY	simulated	6	292	2:bess5:bess7:solar	29.4	2.58	1.1	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.375 s
S03585	RISKY (confirmed)	simulated	6	292	3:solar4:solar6:solar8:solar	40.5	2.33	1.04	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.441 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.292 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.292 s) Time step reduced to zero. Convergence is not likely. (t = 1.292 s)
S03280	RISKY	simulated	12	292	1:solar2:solar6:solar	30	3.13	1	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.200 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.200 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00014	RISKY (unresolved)	simulated	22	292	1:solar7:solar	17.2	3.35	0.928	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.13 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.13 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: non-physical solution: bus 22 held at 0 V for 0.16 s after clearing (false voltage collapse) (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.526 s failed with step 0.00833 s: non-physical solution: bus 22 held at 0 V for 0.17 s after clearing (false voltage collapse) (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.523 s non-physical solution: bus 22 held at 0 V for 0.17 s after clearing (false voltage collapse) (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.513 s
S02503	RISKY	simulated	14	292	4:solar5:solar8:solar	25.1	1.89	0.97	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.440 s
S01890	RISKY	simulated	6	292	5:solar6:solar7:solar8:solar	35.6	2.21	0.908	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.391 s
S04507	RISKY	simulated	2	292	2:solar3:solar5:solar6:solar	43.6	2.51	0.915	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.250 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.250 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.100 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02763	RISKY (confirmed)	simulated	17	292	2:solar5:bess8:solar9:bess	38	0.834	1.03	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.16 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.16 pu is already RISKY: frequency: zenith above 61 Hz; nadir 59.648 Hz, zenith 61.026 Hz sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.292 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.292 s) Time step reduced to zero. Convergence is not likely. (t = 1.292 s) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.067 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03158	RISKY	simulated	22	292	1:solar	7.4	4.87	1.02	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.469 s
S00830	RISKY (confirmed)	simulated	7	292	1:solar	7.4	4.87	1.1	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.439 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.292 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.292 s) Time step reduced to zero. Convergence is not likely. (t = 1.292 s)
S02631	RISKY	simulated	10	292	1:solar9:bess	20.4	0.843	1.07	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.341 s
S03153	RISKY	simulated	8	292	9:solar	13	0.892	0.969	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.491 s
S00885	RISKY	simulated	29	292	1:bess3:bess4:solar	30.8	2.52	0.991	ride_through:PRC-029-1_Table2_voltage: REG_BESS_3 (bus 10) voltage in (1.1, 1.2] for 1.300 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_3 (bus 10) voltage in (1.1, 1.2] for 1.300 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.417 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03410	RISKY	simulated	7	292	1:bess2:solar4:solar6:solar	41.1	2.32	1.05	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.507 s
S01480	RISKY	simulated	26	291	2:bess8:solar	16.4	4.61	1.01	ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.133 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.133 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03584	RISKY	simulated	18	291	2:bess	11	5.4	0.992	ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.667 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.667 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02327	RISKY	simulated	16	291	6:bess	11.7	3.27	1.02	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.403 s
S00700	RISKY (confirmed)	simulated	6	291	1:solar2:solar4:bess8:solar	34.9	2.47	1.03	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.462 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.291 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.291 s) Time step reduced to zero. Convergence is not likely. (t = 1.291 s)
S03335	RISKY	simulated	2	291	2:bess	11	5.4	1.05	ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.267 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.267 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02208	RISKY	simulated	27	291	9:solar	13	0.892	0.975	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.032 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.032 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03066	RISKY	simulated	13	291	2:bess4:solar7:solar8:bess	37.3	2.41	0.906	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.423 s
S00082	RISKY	simulated	8	291	none	0		1	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.473 s
S04922	RISKY	simulated	19	291	none	0		1.06	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.407 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.407 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.696 Hz
S04461	RISKY	simulated	15	291	1:bess	7.4	4.87	1.04	ride_through:PRC-029-1_Table2_voltage: REG_BESS_1 (bus 2) voltage in (1.1, 1.2] for 1.317 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_1 (bus 2) voltage in (1.1, 1.2] for 1.317 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02274	RISKY (unresolved)	simulated	25	291	1:solar	7.4	4.87	0.952	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.291 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.291 s) Time step reduced to zero. Convergence is not likely. (t = 1.291 s)
S00516	RISKY (confirmed)	simulated	16	291	2:solar	11	5.4	1.08	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.06 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.06 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.362 s; retried with step 0.00833 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.291 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.291 s) Time step reduced to zero. Convergence is not likely. (t = 1.291 s)
S02675	RISKY	simulated	22	291	2:solar8:solar9:solar	29.4	0.84	0.983	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.530 s
S04112	RISKY (unresolved)	simulated	20	290	1:bess5:solar6:solar7:solar	37.5	2.16	0.987	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.028 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.027 s) Time step reduced to zero. Convergence is not likely. (t = 1.027 s)
S03441	RISKY (confirmed)	simulated	5	290	1:bess4:bess5:bess9:solar	40	0.801	1.09	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.371 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.047 pu at bus 8 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.362 s failed with step 0.00833 s: non-physical solution: voltage magnitude -0.047 pu at bus 8 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.356 s non-physical solution: voltage magnitude -0.047 pu at bus 8 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.349 s
S04397	RISKY (unresolved)	simulated	29	290	9:bess	13	0.892	0.934	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.021 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.020 s) Time step reduced to zero. Convergence is not likely. (t = 1.020 s)
S04861	RISKY	simulated	3	290	2:solar4:solar7:solar	31.9	2.46	0.942	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.717 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.717 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.250 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02563	RISKY (confirmed)	simulated	28	290	1:bess4:solar6:bess9:solar	43.1	0.786	1.06	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.07 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.07 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.075 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.290 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.290 s) Time step reduced to zero. Convergence is not likely. (t = 1.290 s)
S02771	RISKY	simulated	24	290	1:solar3:solar7:solar8:solar	35	3.18	0.928	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.383 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.383 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00302	RISKY	simulated	23	290	2:bess9:solar	23.9	0.886	0.938	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.443 s
S02981	RISKY	simulated	21	290	3:solar4:solar	23.4	2.61	0.951	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.550 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.550 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 2.117 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00202	RISKY	simulated	5	290	none	0		1.02	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.389 s
S00872	RISKY	simulated	16	290	1:solar6:solar	19.1	3.18	0.966	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.415 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.415 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.547 Hz
S03314	RISKY	simulated	8	290	4:solar5:bess	19.7	1.91	0.95	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.522 s
S03365	RISKY (confirmed)	simulated	10	290	1:solar5:solar	16	2.64	1.02	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.372 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.290 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.290 s) Time step reduced to zero. Convergence is not likely. (t = 1.290 s)
S04079	RISKY (confirmed)	simulated	19	290	1:solar	7.4	4.87	1.04	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.459 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.103 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.411 s failed with step 0.00833 s: non-physical solution: voltage magnitude -0.103 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.406 s non-physical solution: voltage magnitude -0.103 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.398 s
S03691	RISKY	simulated	23	290	8:solar	5.5	4.68	1.06	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.378 s
S03465	RISKY	simulated	7	289	2:bess3:solar4:solar6:bess	46	2.32	1.01	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.2, 9.99) for 0.017 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.2, 9.99) for 0.017 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01263	RISKY	simulated	24	289	none	0		1	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.556 s
S01281	RISKY	simulated	3	289	2:solar7:solar	20.8	3.39	1.08	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.532 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.532 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04530	RISKY	simulated	21	289	2:solar8:solar9:solar	29.4	0.84	0.935	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.983 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.983 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04875	RISKY	simulated	20	289	3:solar7:solar9:solar	35.1	0.868	1.04	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.422 s; retried with step 0.00833 s
S01877	RISKY (unresolved)	simulated	26	289	5:solar7:solar9:solar	31.5	0.873	0.928	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) Time step reduced to zero. Convergence is not likely. (t = 1.000 s)
S04584	RISKY	simulated	21	289	1:solar3:solar	19.7	4.38	1.06	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.488 s
S01821	RISKY (confirmed)	simulated	11	289	8:solar	5.5	4.68	1.08	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.371 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.289 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.289 s) Time step reduced to zero. Convergence is not likely. (t = 1.289 s)
S04668	RISKY	simulated	26	289	2:solar5:bess	19.6	2.66	1.03	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.150 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.150 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01280	RISKY	simulated	11	289	4:solar9:bess	24.1	0.872	0.912	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.405 s
S02368	RISKY	simulated	8	289	2:solar5:solar6:solar	31.2	2.56	1.01	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 2.133 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 2.133 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01217	RISKY (confirmed)	simulated	28	289	8:solar9:solar	18.4	0.848	0.907	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.03 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.03 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.082 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.289 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.289 s) Time step reduced to zero. Convergence is not likely. (t = 1.289 s)
S04672	RISKY	simulated	25	289	3:solar5:solar6:solar	32.6	2.54	0.95	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.383 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.383 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02579	RISKY (confirmed)	simulated	5	289	6:solar9:solar	24.6	0.875	0.992	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.405 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.289 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.289 s) Time step reduced to zero. Convergence is not likely. (t = 1.289 s)
S04313	RISKY	simulated	7	289	2:solar5:solar7:solar	29.4	2.58	0.955	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.932 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.932 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00225	RISKY	simulated	8	288	1:solar3:solar6:solar	31.4	3.09	1.02	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.538 s
S00787	RISKY	simulated	25	288	3:solar7:bess9:bess	35.1	0.868	0.924	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.667 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.667 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03645	RISKY	simulated	13	288	4:solar5:solar9:solar	32.6	0.86	1.06	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.371 s
S04887	RISKY	simulated	5	288	none	0		1.03	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.388 s
S00629	RISKY (unresolved)	simulated	26	288	2:bess4:solar7:solar9:bess	44.9	0.844	0.91	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) Time step reduced to zero. Convergence is not likely. (t = 1.000 s)
S00478	RISKY	simulated	24	288	2:bess6:solar7:solar	32.4	2.3	1.07	voltage_recovery: slowest bus 34: 1.013 s to reach 0.8 pu (limit 1 s) voltage_recovery: slowest bus 34: 1.013 s to reach 0.8 pu (limit 1 s) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_6 (bus 22) voltage in (1.2, 9.99) for 0.033 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_7 (bus 23) voltage in (1.2, 9.99) for 0.033 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02815	RISKY	simulated	7	288	5:solar8:solar	14.1	2.65	1.07	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.403 s
S02025	RISKY	simulated	20	288	1:solar2:solar6:solar7:solar	39.9	2.19	0.962	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.459 s; retried with step 0.00208 s
S03789	RISKY (confirmed)	simulated	10	288	1:bess4:bess6:solar8:solar	35.6	2.28	0.937	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.386 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.288 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.288 s) Time step reduced to zero. Convergence is not likely. (t = 1.288 s)
S03390	RISKY	simulated	3	288	1:bess2:bess	18.4	4.76	1.04	ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.633 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.633 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04146	RISKY	simulated	13	288	none	0		1.01	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.387 s
S00239	RISKY	simulated	4	288	7:solar9:solar	22.8	0.879	0.949	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.455 s
S01622	RISKY (confirmed)	simulated	28	288	4:solar7:solar9:solar	33.9	0.854	1.05	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.02 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.02 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.079 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.288 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.288 s) Time step reduced to zero. Convergence is not likely. (t = 1.288 s)
S03861	RISKY	simulated	6	288	3:solar7:solar	22.1	3.37	0.975	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.369 s; retried with step 0.00833 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.369 s; retried with step 0.00833 s ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in [0.1, 0.25) for 0.360 s > 0.32 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03802	RISKY	simulated	14	288	none	0		0.953	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.454 s
S00908	RISKY (unresolved)	simulated	22	288	7:solar	9.8	3.44	1.03	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.288 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.288 s) Time step reduced to zero. Convergence is not likely. (t = 1.288 s)
S03464	RISKY	simulated	24	288	1:solar4:solar6:bess7:solar	39.9	1.91	1.1	ride_through:PRC-029-1_Table2_voltage: REG_BESS_6 (bus 22) voltage in (1.2, 9.99) for 0.058 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_6 (bus 22) voltage in (1.2, 9.99) for 0.058 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_7 (bus 23) voltage in (1.2, 9.99) for 0.058 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01547	RISKY	simulated	14	287	none	0		0.996	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.420 s
S04649	RISKY	simulated	23	287	1:bess3:solar	19.7	4.38	1.06	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.377 s
S00511	RISKY	simulated	13	287	9:solar	13	0.892	1.09	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.370 s
S00835	RISKY	simulated	21	287	1:bess3:solar6:solar	31.4	3.09	0.935	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.383 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.383 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03406	RISKY	simulated	11	287	9:solar	13	0.892	0.911	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.420 s
S04157	RISKY (confirmed)	simulated	19	287	9:solar	13	0.892	0.978	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.496 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.100 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.425 s failed with step 0.00833 s: non-physical solution: voltage magnitude -0.100 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.420 s non-physical solution: voltage magnitude -0.100 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.412 s
S04919	RISKY	simulated	29	287	3:solar4:solar8:solar	28.8	2.56	1.05	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.117 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.117 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02050	RISKY	simulated	11	287	4:solar5:solar6:solar8:solar	36.8	1.75	1.04	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.369 s
S03271	RISKY	simulated	10	287	5:solar7:solar8:bess	23.9	2.58	0.992	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.335 s; retried with step 0.00208 s
S00893	RISKY	simulated	11	287	none	0		1.02	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.369 s
S01340	RISKY	simulated	20	287	1:solar4:solar	18.5	2.6	0.954	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.410 s; retried with step 0.00208 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.410 s; retried with step 0.00208 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.485 Hz
S02689	RISKY	simulated	29	286	2:solar4:solar8:solar	27.5	2.59	0.945	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.267 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.267 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.133 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04614	RISKY	simulated	15	286	2:solar6:solar	22.6	3.23	1.04	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.417 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.417 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04596	RISKY (confirmed)	simulated	6	286	2:solar4:bess5:solar6:solar	42.3	1.75	0.945	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.486 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.286 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.286 s) Time step reduced to zero. Convergence is not likely. (t = 1.286 s)
S03617	RISKY (confirmed)	simulated	13	286	1:solar2:solar3:solar	30.7	3.82	0.982	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.2, 9.99) for 0.017 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.286 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.286 s) Time step reduced to zero. Convergence is not likely. (t = 1.286 s)
S00106	RISKY	simulated	27	286	2:solar6:solar	22.6	3.23	0.99	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.250 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.250 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01720	RISKY (confirmed)	simulated	16	286	2:solar6:solar	22.6	3.23	1.08	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.18 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.18 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.567 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.286 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.286 s) Time step reduced to zero. Convergence is not likely. (t = 1.286 s) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_6 (bus 22) voltage in (1.1, 1.2] for 1.533 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03498	RISKY (unresolved)	simulated	2	286	3:solar6:solar7:solar8:solar	39.3	2.21	0.991	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.19 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.19 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.286 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.286 s) Time step reduced to zero. Convergence is not likely. (t = 1.286 s)
S00081	RISKY	simulated	6	286	3:solar9:bess	25.3	0.883	1.02	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.383 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.383 s ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in [0.1, 0.25) for 0.366 s > 0.32 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03675	RISKY	simulated	24	286	3:solar5:solar	20.9	2.64	0.949	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.650 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.650 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00718	RISKY	simulated	18	286	2:solar	11	5.4	1.06	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.517 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.517 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00338	RISKY	simulated	3	286	6:bess	11.6	3.27	1.09	ride_through:PRC-029-1_Table2_voltage: REG_BESS_6 (bus 22) voltage in (1.1, 1.2] for 1.599 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_6 (bus 22) voltage in (1.1, 1.2] for 1.599 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01458	RISKY (unresolved)	simulated	26	285	3:solar5:solar8:solar9:bess	39.4	0.83	0.941	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) Time step reduced to zero. Convergence is not likely. (t = 1.000 s)
S04917	RISKY	simulated	23	285	5:solar8:bess	14.1	2.65	1.07	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.379 s
S04139	RISKY (unresolved)	simulated	26	285	8:solar9:bess	18.4	0.848	1.03	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) Time step reduced to zero. Convergence is not likely. (t = 1.000 s)
S04710	RISKY	simulated	11	285	none	0		1	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.385 s
S00396	RISKY	simulated	11	285	none	0		1.05	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.368 s
S02753	RISKY (confirmed)	simulated	19	285	none	0		0.971	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.494 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.100 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.436 s failed with step 0.00833 s: non-physical solution: voltage magnitude -0.100 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.426 s non-physical solution: voltage magnitude -0.100 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.412 s
S02278	RISKY	simulated	15	285	1:solar2:solar4:bess8:solar	34.9	2.47	1.07	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.450 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.450 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 2.000 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00615	RISKY (unresolved)	simulated	23	285	7:solar	9.8	3.44	0.965	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.112 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.111 s) Time step reduced to zero. Convergence is not likely. (t = 1.111 s)
S03891	RISKY	simulated	3	285	2:solar6:solar9:solar	35.6	0.868	0.911	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 2.000 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 2.000 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04546	RISKY (confirmed)	simulated	17	285	2:solar7:solar8:solar9:solar	39.3	0.823	0.93	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.06 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.06 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.683 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.285 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.285 s) Time step reduced to zero. Convergence is not likely. (t = 1.285 s) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.030 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02105	RISKY	simulated	11	285	2:solar3:bess4:solar6:solar	46	2.32	0.963	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.2, 9.99) for 0.033 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.2, 9.99) for 0.033 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_BESS_3 (bus 10) voltage in (1.2, 9.99) for 0.033 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04208	RISKY	simulated	13	285	3:solar	12.3	4.58	0.917	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.567 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.567 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03466	RISKY (confirmed)	simulated	19	285	1:solar4:solar	18.5	2.6	0.931	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.11 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.11 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.783 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.047 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.046 s) Time step reduced to zero. Convergence is not likely. (t = 1.046 s)
S03972	RISKY (confirmed)	simulated	10	285	9:solar	13	0.892	0.923	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.401 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.285 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.285 s) Time step reduced to zero. Convergence is not likely. (t = 1.285 s)
S01234	RISKY	simulated	11	285	1:solar	7.4	4.87	0.966	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.401 s
S04876	RISKY	simulated	11	285	1:solar6:solar	19.1	3.18	0.964	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.401 s
S03014	RISKY (confirmed)	simulated	16	284	2:solar	11	5.4	1.06	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.18 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.18 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.467 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.284 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.284 s) Time step reduced to zero. Convergence is not likely. (t = 1.284 s)
S03764	RISKY (confirmed)	simulated	5	284	1:solar7:solar9:solar	30.2	0.826	0.969	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.483 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.284 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.284 s) Time step reduced to zero. Convergence is not likely. (t = 1.284 s)
S02124	RISKY	simulated	7	284	6:solar	11.7	3.27	0.908	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_6 (bus 22) voltage in (1.1, 1.2] for 1.967 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_6 (bus 22) voltage in (1.1, 1.2] for 1.967 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04277	RISKY (confirmed)	simulated	10	284	none	0		1.08	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.350 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.284 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.284 s) Time step reduced to zero. Convergence is not likely. (t = 1.284 s)
S04227	RISKY (confirmed)	simulated	6	284	3:solar5:solar7:solar8:solar	36.2	2.54	0.97	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.515 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.059 pu at bus 8 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.370 s failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.284 s) Time step reduced to zero. Convergence is not likely. (t = 1.284 s)
S01235	RISKY	simulated	14	284	6:bess	11.6	3.27	1.09	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.400 s
S00068	RISKY	simulated	21	284	none	0		1.08	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.482 s
S02855	RISKY	simulated	22	284	none	0		0.996	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.529 s
S00460	RISKY	simulated	4	284	6:solar7:solar	21.5	2.35	1.06	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.416 s
S04568	RISKY	simulated	6	284	3:solar5:solar	20.9	2.64	0.946	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.383 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.383 s ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in [0.1, 0.25) for 0.366 s > 0.32 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04508	RISKY	simulated	19	284	3:solar6:solar7:solar9:bess	46.8	0.833	0.91	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.428 s; retried with step 0.00208 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.428 s; retried with step 0.00208 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.461 Hz
S01744	RISKY (confirmed)	simulated	19	284	8:bess	5.5	4.68	1.1	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.442 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.106 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.399 s failed with step 0.00833 s: non-physical solution: voltage magnitude -0.106 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.392 s non-physical solution: voltage magnitude -0.106 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.384 s
S02482	RISKY	simulated	21	284	none	0		1.09	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.465 s
S00588	RISKY	simulated	11	284	7:solar8:solar	15.3	3.39	0.964	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.400 s
S00817	RISKY	simulated	24	284	4:solar5:solar	19.7	1.91	0.933	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.630 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.630 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03832	RISKY (confirmed)	simulated	16	284	1:solar4:bess	18.5	2.6	0.989	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.17 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.17 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 2.150 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.284 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.284 s) Time step reduced to zero. Convergence is not likely. (t = 1.284 s)
S04501	RISKY	simulated	20	284	8:solar	5.5	4.68	0.966	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.466 s; retried with step 0.00833 s
S00796	RISKY (confirmed)	simulated	28	283	1:bess9:solar	20.4	0.843	1.02	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.02 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.02 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.079 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.283 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.283 s) Time step reduced to zero. Convergence is not likely. (t = 1.283 s)
S03919	RISKY (confirmed)	simulated	20	283	4:solar	11.1	2.68	0.926	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.03 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.03 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.507 s; retried with step 0.00833 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.283 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.283 s) Time step reduced to zero. Convergence is not likely. (t = 1.283 s)
S03452	RISKY	simulated	11	283	4:bess	11.1	2.68	1.09	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.366 s
S04789	RISKY	simulated	15	283	1:solar3:bess7:solar	29.5	3.27	1.02	ride_through:PRC-029-1_Table2_voltage: REG_BESS_3 (bus 10) voltage in (1.1, 1.2] for 1.200 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_3 (bus 10) voltage in (1.1, 1.2] for 1.200 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02652	RISKY	simulated	13	283	8:solar	5.5	4.68	1.02	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.382 s
S04516	RISKY	simulated	22	283	1:solar9:solar	20.4	0.843	1.04	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.479 s
S01027	RISKY	simulated	17	283	1:solar2:solar4:solar	29.4	2.55	1.02	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.583 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.583 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 2.033 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01616	RISKY (confirmed)	simulated	20	283	2:solar3:solar4:bess5:bess	43	1.84	0.907	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.10 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.10 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.2, 9.99) for 0.077 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.021 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.283 s) Time step reduced to zero. Convergence is not likely. (t = 1.020 s) ride_through:PRC-029-1_Table2_voltage: REG_BESS_5 (bus 20) voltage in (1.2, 9.99) for 0.065 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03486	RISKY (confirmed)	simulated	10	283	4:solar6:bess8:solar9:solar	41.2	0.796	0.923	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.397 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.283 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.283 s) Time step reduced to zero. Convergence is not likely. (t = 1.283 s)
S04034	RISKY	simulated	20	283	1:solar7:solar	17.2	3.35	0.947	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.473 s; retried with step 0.00208 s
S03229	RISKY	simulated	22	283	5:solar6:solar7:bess8:solar	35.6	2.21	1.03	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_6 (bus 22) voltage in (1.2, 9.99) for 0.067 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_6 (bus 22) voltage in (1.2, 9.99) for 0.067 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_BESS_7 (bus 23) voltage in (1.2, 9.99) for 0.067 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03399	RISKY	simulated	6	283	4:bess6:bess8:solar	28.2	2.42	0.984	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.382 s
S01913	RISKY (confirmed)	simulated	5	283	3:solar9:solar	25.3	0.883	0.916	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.682 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.283 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.283 s) Time step reduced to zero. Convergence is not likely. (t = 1.283 s)
S03674	RISKY	simulated	7	283	1:bess6:solar	19.1	3.18	0.9	ride_through:PRC-029-1_Table2_voltage: REG_BESS_1 (bus 2) voltage in (1.1, 1.2] for 1.349 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_1 (bus 2) voltage in (1.1, 1.2] for 1.349 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_6 (bus 22) voltage in (1.1, 1.2] for 1.716 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00696	RISKY (confirmed)	simulated	19	283	none	0		1.03	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.466 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.102 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.415 s failed with step 0.00833 s: non-physical solution: voltage magnitude -0.102 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.407 s non-physical solution: voltage magnitude -0.102 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.399 s
S04485	RISKY	simulated	11	282	1:bess	7.4	4.87	1.05	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.365 s
S04534	RISKY	simulated	6	282	1:solar5:solar7:solar9:bess	38.8	0.818	0.991	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.378 s
S00447	RISKY (unresolved)	simulated	26	282	3:bess6:solar9:bess	36.9	0.864	1.01	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) Time step reduced to zero. Convergence is not likely. (t = 1.000 s)
S03698	RISKY	simulated	6	282	1:solar	7.4	4.87	1.07	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.362 s
S03105	RISKY	simulated	7	282	8:bess	5.5	4.68	0.969	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.565 s
S02153	RISKY	simulated	4	282	9:solar	13	0.892	1.05	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.414 s
S01487	RISKY	simulated	23	282	2:solar5:solar	19.6	2.66	0.98	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.423 s
S04355	RISKY	simulated	13	282	none	0		1.08	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.364 s
S01502	RISKY	simulated	6	282	1:solar	7.4	4.87	1.05	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.363 s
S00427	RISKY	simulated	14	282	2:bess7:solar	20.8	3.39	1.04	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.439 s
S01856	RISKY	simulated	22	281	1:solar2:bess6:solar9:bess	43	0.81	1.03	ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.383 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.383 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04365	RISKY	simulated	15	281	3:solar9:bess	25.3	0.883	0.972	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.583 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.583 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01809	RISKY	simulated	24	281	2:solar6:solar7:solar8:solar	37.9	2.24	0.95	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_6 (bus 22) voltage in (1.2, 9.99) for 0.050 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_6 (bus 22) voltage in (1.2, 9.99) for 0.050 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_7 (bus 23) voltage in (1.2, 9.99) for 0.050 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04067	RISKY	simulated	18	281	3:solar8:bess	17.8	4.48	1.05	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.150 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.150 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00604	RISKY	simulated	4	281	1:solar2:bess	18.4	4.76	0.959	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_1 (bus 2) voltage in (1.1, 1.2] for 1.200 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_1 (bus 2) voltage in (1.1, 1.2] for 1.200 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 2.200 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04074	RISKY (unresolved)	simulated	2	281	4:solar7:bess8:solar	26.4	2.46	1.03	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.19 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.19 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.281 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.281 s) Time step reduced to zero. Convergence is not likely. (t = 1.281 s)
S00394	RISKY (unresolved)	simulated	19	281	1:bess4:solar5:solar9:solar	40.1	0.801	1.03	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) Time step reduced to zero. Convergence is not likely. (t = 1.000 s)
S04307	RISKY (confirmed)	simulated	22	281	3:solar	12.3	4.58	1.02	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.554 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.100 pu at bus 23 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.399 s failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.281 s) Time step reduced to zero. Convergence is not likely. (t = 1.281 s)
S02989	RISKY (confirmed)	simulated	5	281	4:solar5:solar	19.7	1.91	0.992	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.15 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.15 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.480 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.048 pu at bus 8 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.397 s failed with step 0.00833 s: non-physical solution: voltage magnitude -0.048 pu at bus 8 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.372 s non-physical solution: voltage magnitude -0.048 pu at bus 8 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.366 s
S04394	RISKY (unresolved)	simulated	25	281	1:bess3:bess8:bess	25.1	3.51	1.07	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.120 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.119 s) Time step reduced to zero. Convergence is not likely. (t = 1.119 s)
S00733	RISKY	simulated	18	281	5:solar7:solar8:bess9:bess	36.9	0.825	0.987	ride_through:PRC-029-1_Table2_voltage: REG_BESS_9 (bus 29) voltage in (1.2, 9.99) for 0.016 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_9 (bus 29) voltage in (1.2, 9.99) for 0.016 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01097	RISKY (unresolved)	simulated	19	281	5:solar7:solar	18.5	2.6	1.06	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.009 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.009 s) Time step reduced to zero. Convergence is not likely. (t = 1.010 s)
S04494	RISKY (confirmed)	simulated	24	281	4:solar5:solar6:solar	31.3	1.78	1.07	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: frequency: zenith above 61 Hz; nadir 59.702 Hz, zenith 61.084 Hz sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.281 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.281 s) Time step reduced to zero. Convergence is not likely. (t = 1.281 s)
S03577	RISKY	simulated	8	280	1:bess4:solar	18.5	2.6	1.05	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.446 s
S03999	RISKY (confirmed)	simulated	17	280	1:solar2:solar3:solar4:solar	41.7	2.45	0.929	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.06 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.06 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.482 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: non-physical solution: bus 18 held at 0 V for 0.14 s after clearing (false voltage collapse) (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.478 s failed with step 0.00833 s: non-physical solution: bus 18 held at 0 V for 0.14 s after clearing (false voltage collapse) (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.478 s non-physical solution: bus 18 held at 0 V for 0.14 s after clearing (false voltage collapse) (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.473 s ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.448 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.483 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02186	RISKY	simulated	2	280	2:solar4:solar6:solar	33.7	2.42	1.08	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.100 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.100 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.283 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00256	RISKY	simulated	14	280	7:bess	9.8	3.44	0.925	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.479 s
S03899	RISKY	simulated	16	280	none	0		0.944	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.380 s; retried with step 0.00208 s
S01963	RISKY (confirmed)	simulated	6	280	3:solar5:solar9:solar	33.9	0.877	1.05	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.441 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.280 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.280 s) Time step reduced to zero. Convergence is not likely. (t = 1.280 s)
S03197	RISKY (confirmed)	simulated	28	280	5:solar9:solar	21.6	0.887	1.08	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.03 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.03 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.082 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.280 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.280 s) Time step reduced to zero. Convergence is not likely. (t = 1.280 s)
S00713	RISKY	simulated	19	280	6:solar7:solar	21.5	2.35	1.06	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.396 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.396 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.605 Hz
S00962	RISKY (confirmed)	simulated	10	280	2:solar	11	5.4	1.1	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.343 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.280 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.280 s) Time step reduced to zero. Convergence is not likely. (t = 1.280 s)
S01491	RISKY	simulated	17	280	1:solar2:solar7:bess	28.2	3.3	1	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.650 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.650 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00126	RISKY	simulated	23	280	1:solar2:bess4:solar	29.4	2.55	1.08	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.376 s
S03875	RISKY (confirmed)	simulated	28	280	3:solar8:solar9:solar	30.7	0.836	0.929	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.02 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.02 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.079 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.280 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.280 s) Time step reduced to zero. Convergence is not likely. (t = 1.280 s)
S03050	RISKY (confirmed)	simulated	5	280	7:solar	9.8	3.44	0.97	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.15 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.15 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.511 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.280 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.280 s) Time step reduced to zero. Convergence is not likely. (t = 1.280 s)
S03450	RISKY (confirmed)	simulated	19	280	7:solar8:solar	15.3	3.39	1.02	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.484 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.211 s) failed with step 0.00833 s: non-physical solution: voltage magnitude -0.102 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.409 s non-physical solution: voltage magnitude -0.102 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.401 s
S03683	RISKY	simulated	18	280	1:solar4:bess9:bess	31.4	0.817	0.994	ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 1.933 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 1.933 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03908	RISKY (confirmed)	simulated	28	279	1:solar4:solar5:solar9:solar	40.1	0.801	0.949	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.02 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.02 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.082 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.279 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.279 s) Time step reduced to zero. Convergence is not likely. (t = 1.279 s)
S03372	RISKY	simulated	15	279	1:bess3:solar6:solar	31.4	3.09	0.911	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.567 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.567 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00599	RISKY	simulated	3	279	1:bess2:solar8:solar9:bess	36.8	0.761	0.945	frequency: zenith above 61 Hz; nadir 59.639 Hz, zenith 61.005 Hz frequency: zenith above 61 Hz; nadir 59.639 Hz, zenith 61.005 Hz ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.133 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_8 (bus 25) voltage in (1.2, 9.99) for 0.017 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_BESS_9 (bus 29) voltage in (1.2, 9.99) for 0.049 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03040	RISKY	simulated	14	279	2:solar7:solar9:solar	33.8	0.872	0.903	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 2.599 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 2.599 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.1, 1.2] for 1.150 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04426	RISKY (unresolved)	simulated	20	279	1:solar5:solar6:solar	27.7	2.53	0.931	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.030 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.030 s) Time step reduced to zero. Convergence is not likely. (t = 1.029 s)
S01994	RISKY	simulated	26	279	2:bess3:solar4:solar	34.3	2.56	0.942	ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.100 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.100 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.117 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.200 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03023	RISKY (confirmed)	simulated	6	279	3:solar6:solar9:bess	36.9	0.864	0.958	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.794 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.279 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.279 s) Time step reduced to zero. Convergence is not likely. (t = 1.279 s)
S02135	RISKY	simulated	18	279	1:solar4:bess6:solar	30.1	2.37	0.909	ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 1.250 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 1.250 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04101	RISKY (confirmed)	simulated	22	279	3:bess	12.3	4.58	1.02	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_BESS_3 (bus 10) voltage in (1.1, 1.2] for 1.700 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.279 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.279 s) Time step reduced to zero. Convergence is not likely. (t = 1.279 s)
S00434	RISKY	simulated	4	279	none	0		0.948	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.479 s
S01011	RISKY (unresolved)	simulated	25	279	1:solar4:solar5:solar8:solar	32.5	1.82	1	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.122 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.121 s) Time step reduced to zero. Convergence is not likely. (t = 1.121 s)
S03797	RISKY	simulated	14	279	none	0		0.947	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.462 s
S00456	RISKY	simulated	13	278	5:solar9:solar	21.6	0.887	0.903	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.428 s
S04103	RISKY (unresolved)	simulated	19	278	5:solar6:bess	20.3	2.58	1.09	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.009 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.009 s) Time step reduced to zero. Convergence is not likely. (t = 1.009 s)
S01134	RISKY	simulated	3	278	6:solar	11.7	3.27	1.07	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_6 (bus 22) voltage in (1.1, 1.2] for 1.550 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_6 (bus 22) voltage in (1.1, 1.2] for 1.550 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00233	RISKY	simulated	13	278	1:solar4:solar8:solar	23.9	2.53	0.957	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.411 s
S04142	RISKY	simulated	25	278	3:solar4:solar5:bess7:solar	41.9	1.76	0.904	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.483 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.483 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01708	RISKY (unresolved)	simulated	25	278	1:bess4:solar6:solar8:solar	35.6	2.28	1.07	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.116 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.116 s) Time step reduced to zero. Convergence is not likely. (t = 1.117 s)
S02525	RISKY	simulated	5	278	none	0		1.01	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.377 s
S03088	RISKY (confirmed)	simulated	22	278	none	0		1.07	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.470 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.278 s) failed with step 0.00833 s: non-physical solution: voltage magnitude -0.145 pu at bus 23 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.394 s Time step reduced to zero. Convergence is not likely. (t = 1.278 s)
S00884	RISKY	simulated	7	278	4:solar7:solar	20.9	2.51	0.971	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.544 s
S03531	RISKY	simulated	15	278	2:solar5:solar8:solar	25	2.64	0.955	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.650 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.650 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04561	RISKY	simulated	11	278	6:bess7:bess	21.5	2.35	0.934	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.410 s
S00617	RISKY (confirmed)	simulated	16	278	1:solar2:solar	18.4	4.76	0.984	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.18 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.18 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_1 (bus 2) voltage in (1.1, 1.2] for 1.067 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.043 pu at bus 16 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.378 s failed with step 0.00833 s: non-physical solution: voltage magnitude -0.043 pu at bus 16 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.371 s Time step reduced to zero. Convergence is not likely. (t = 1.278 s) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 2.133 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04444	RISKY	simulated	22	278	4:bess5:solar6:solar7:bess	41.2	1.57	1.09	ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.2, 9.99) for 0.049 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.2, 9.99) for 0.049 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_5 (bus 20) voltage in (1.2, 9.99) for 0.049 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_6 (bus 22) voltage in (1.2, 9.99) for 0.066 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_BESS_7 (bus 23) voltage in (1.2, 9.99) for 0.066 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02607	RISKY (confirmed)	simulated	19	278	none	0		1.09	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.440 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.106 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.400 s failed with step 0.00833 s: non-physical solution: voltage magnitude -0.106 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.394 s non-physical solution: voltage magnitude -0.106 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.384 s
S04871	RISKY	simulated	17	278	2:bess5:bess	19.6	2.66	1.01	ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.617 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.617 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00471	RISKY	simulated	4	277	2:solar6:solar8:solar	28.1	3.18	0.976	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 2.032 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 2.032 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_6 (bus 22) voltage in (1.1, 1.2] for 1.066 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02234	RISKY	simulated	4	277	5:solar9:solar	21.6	0.887	0.995	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.444 s
S00697	RISKY	simulated	4	277	2:solar5:solar8:solar	25	2.64	1.04	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.474 s
S02984	RISKY	simulated	15	277	2:bess7:solar	20.8	3.39	1.04	ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.300 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.300 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03497	RISKY (confirmed)	simulated	19	277	4:solar6:solar8:solar9:bess	41.2	0.796	0.974	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.441 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.042 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.042 s) Time step reduced to zero. Convergence is not likely. (t = 1.041 s) frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.528 Hz
S01333	RISKY	simulated	7	277	none	0		1.06	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.459 s
S04413	RISKY	simulated	4	277	7:solar9:solar	22.8	0.879	0.931	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.494 s
S04554	RISKY	simulated	14	277	none	0		0.943	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.476 s
S02411	RISKY	simulated	8	277	2:solar6:solar8:solar	28.1	3.18	0.97	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.832 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.832 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03686	RISKY	simulated	8	277	6:solar	11.7	3.27	0.952	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.576 s
S04914	RISKY	simulated	20	277	6:solar7:solar	21.5	2.35	0.965	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.482 s; retried with step 0.00833 s
S04654	RISKY	simulated	7	276	6:solar	11.6	3.27	1.09	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.440 s
S02710	RISKY (confirmed)	simulated	11	276	2:solar4:solar5:solar	30.6	1.89	1.07	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.374 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.276 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.276 s) Time step reduced to zero. Convergence is not likely. (t = 1.276 s)
S03622	RISKY	simulated	18	276	2:solar5:solar6:bess	31.3	2.56	0.937	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.567 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.567 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04986	RISKY	simulated	22	276	3:solar8:solar9:solar	30.7	0.836	0.973	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.767 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.767 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03243	RISKY	simulated	24	276	none	0		1.1	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.443 s
S04800	RISKY (confirmed)	simulated	20	276	4:solar5:bess	19.7	1.91	0.922	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.10 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.10 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.2, 9.99) for 0.068 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.021 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.021 s) Time step reduced to zero. Convergence is not likely. (t = 1.020 s) ride_through:PRC-029-1_Table2_voltage: REG_BESS_5 (bus 20) voltage in (1.2, 9.99) for 0.068 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03349	RISKY	simulated	27	276	2:solar	11	5.4	1.02	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.167 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.167 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01164	RISKY (confirmed)	simulated	5	276	1:solar5:solar6:solar9:bess	40.6	0.813	1.06	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.442 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.019 pu at bus 6 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.363 s failed with step 0.00833 s: non-physical solution: voltage magnitude -0.047 pu at bus 8 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.365 s non-physical solution: voltage magnitude -0.020 pu at bus 6 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.355 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.095 Hz
S04854	RISKY	simulated	24	276	4:solar	11.1	2.68	0.995	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 2.200 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 2.200 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02610	RISKY	simulated	24	276	6:solar7:solar	21.5	2.35	1.1	frequency: zenith above 61 Hz; nadir 59.827 Hz, zenith 61.053 Hz frequency: zenith above 61 Hz; nadir 59.827 Hz, zenith 61.053 Hz ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_6 (bus 22) voltage in (1.2, 9.99) for 0.028 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_7 (bus 23) voltage in (1.2, 9.99) for 0.028 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00889	RISKY	simulated	18	276	9:solar	13	0.892	1.04	frequency: zenith above 61 Hz; nadir 59.727 Hz, zenith 61.042 Hz
S03428	RISKY	simulated	16	276	2:solar6:bess	22.6	3.23	0.977	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.404 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.404 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.537 Hz
S00811	RISKY	simulated	26	276	3:solar	12.3	4.58	0.913	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.433 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.433 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02273	RISKY (unresolved)	simulated	26	276	5:bess6:solar8:solar9:bess	38.7	0.821	0.916	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) Time step reduced to zero. Convergence is not likely. (t = 1.000 s)
S01016	RISKY	simulated	22	275	1:solar	7.4	4.87	0.948	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_1 (bus 2) voltage in (1.1, 1.2] for 1.033 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_1 (bus 2) voltage in (1.1, 1.2] for 1.033 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02056	RISKY	simulated	7	275	2:solar3:solar6:bess9:solar	47.9	0.852	0.99	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.2, 9.99) for 0.017 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.2, 9.99) for 0.017 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01222	RISKY	simulated	19	275	1:solar2:solar	18.4	4.76	1.06	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.407 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.407 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.694 Hz
S04031	RISKY	simulated	26	275	4:bess	11.1	2.68	0.907	ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 1.567 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 1.567 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00797	RISKY	simulated	23	275	none	0		0.974	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.439 s
S03312	RISKY	simulated	27	275	4:bess	11.1	2.68	0.942	ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 1.517 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 1.517 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02333	RISKY	simulated	8	275	1:bess4:solar5:bess8:solar	32.5	1.82	1.08	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.438 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.438 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.007 Hz
S01891	RISKY	simulated	27	275	2:solar9:solar	23.9	0.886	0.989	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.300 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.300 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.048 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02302	RISKY	simulated	20	275	1:solar7:bess8:solar	22.7	3.27	1.08	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.425 s; retried with step 0.00833 s
S01105	RISKY (confirmed)	simulated	5	275	1:solar5:solar	16	2.64	1	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.15 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.15 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.491 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.275 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.275 s) Time step reduced to zero. Convergence is not likely. (t = 1.275 s)
S03214	RISKY	simulated	13	275	2:solar9:solar	24	0.886	0.913	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.446 s
S01353	RISKY	simulated	22	275	3:solar	12.3	4.58	0.936	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.733 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.733 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00952	RISKY	simulated	23	274	2:solar3:solar5:solar9:solar	44.8	0.867	1.05	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.397 s
S03251	RISKY	simulated	23	274	1:bess5:solar	16	2.64	1.1	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.370 s
S00799	RISKY	simulated	19	274	1:solar3:solar8:solar	25.2	3.51	1.02	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.419 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.419 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.670 Hz
S01536	RISKY	simulated	24	274	none	0		1.08	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.474 s
S03061	RISKY	simulated	26	274	2:solar3:solar7:solar	33.1	3.3	0.939	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.033 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.033 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.033 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01908	RISKY (unresolved)	simulated	16	274	3:solar5:solar7:solar9:solar	43.7	0.861	1	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.18 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.18 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: non-physical solution: bus 15 held at 0 V for 0.11 s after clearing (false voltage collapse) (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.466 s failed with step 0.00833 s: non-physical solution: bus 15 held at 0 V for 0.12 s after clearing (false voltage collapse) (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.463 s Time step reduced to zero. Convergence is not likely. (t = 1.274 s)
S00758	RISKY (unresolved)	simulated	25	274	1:solar8:solar	12.9	3.63	0.946	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.124 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.124 s) Time step reduced to zero. Convergence is not likely. (t = 1.123 s)
S01494	RISKY (unresolved)	simulated	25	274	6:solar8:solar	17.1	3.23	1.08	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.15 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.15 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.149 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.148 s) Time step reduced to zero. Convergence is not likely. (t = 1.148 s)
S01899	RISKY	simulated	13	274	2:bess4:solar5:bess9:bess	43.6	0.851	0.948	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.421 s
S02157	RISKY	simulated	13	274	none	0		1.06	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.373 s
S01903	RISKY	simulated	8	274	5:solar6:solar9:bess	33.3	0.869	1	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.489 s
S03317	RISKY	simulated	11	274	1:bess4:solar7:solar	28.3	2.42	1.01	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.390 s
S03444	RISKY (unresolved)	simulated	25	274	3:bess5:solar8:bess	26.4	2.62	1.02	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.15 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.15 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.152 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.151 s) Time step reduced to zero. Convergence is not likely. (t = 1.274 s)
S01317	RISKY (unresolved)	simulated	25	274	1:solar6:solar8:solar9:solar	37.5	0.746	1.08	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.103 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.102 s) Time step reduced to zero. Convergence is not likely. (t = 1.101 s)
S03671	RISKY	simulated	20	274	3:solar	12.3	4.58	1.02	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.448 s; retried with step 0.00833 s
S02976	RISKY (unresolved)	simulated	29	273	1:solar5:solar6:solar9:solar	40.7	0.813	0.914	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.020 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.020 s) Time step reduced to zero. Convergence is not likely. (t = 1.020 s)
S04514	RISKY (confirmed)	simulated	3	273	1:solar4:solar8:solar9:solar	36.9	0.741	0.921	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.06 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.06 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_1 (bus 2) voltage in (1.2, 9.99) for 0.027 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.273 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.273 s) Time step reduced to zero. Convergence is not likely. (t = 1.273 s) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.517 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_8 (bus 25) voltage in (1.2, 9.99) for 0.041 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.051 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00725	RISKY	simulated	5	273	5:bess	8.6	2.67	1.05	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.373 s
S03049	RISKY	simulated	6	273	1:solar5:solar7:solar8:solar	31.3	2.52	1.04	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.370 s
S03850	RISKY	simulated	7	273	1:solar5:solar6:solar8:solar	33.1	2.49	0.99	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.522 s
S00132	RISKY	simulated	21	273	1:bess2:solar4:bess8:solar	34.9	2.47	1.05	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.383 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.383 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 1.850 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03490	RISKY	simulated	20	273	6:solar	11.7	3.27	0.931	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.508 s; retried with step 0.00208 s
S00372	RISKY	simulated	8	273	1:solar2:solar7:bess	28.2	3.3	0.941	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.950 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.950 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03509	RISKY	simulated	11	273	7:bess	9.8	3.44	0.947	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.405 s
S02781	RISKY	simulated	1	272	1:bess6:solar8:solar9:solar	37.5	0.746	1.05	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.017 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.017 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04663	RISKY	simulated	8	272	3:solar	12.3	4.58	0.903	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.550 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.550 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02748	RISKY	simulated	22	272	2:solar4:solar	22	2.64	0.94	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.427 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.427 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.465 Hz
S04343	RISKY	simulated	2	272	2:solar4:solar5:solar6:bess	42.3	1.75	1.04	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.182 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.182 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00376	RISKY	simulated	6	272	5:bess6:solar	20.3	2.58	0.953	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.388 s
S01332	RISKY	simulated	27	272	4:solar9:solar	24	0.872	1.03	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.029 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.029 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00961	RISKY	simulated	14	272	none	0		0.984	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.455 s
S02132	RISKY	simulated	20	272	7:solar8:solar	15.3	3.39	1	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.461 s; retried with step 0.00833 s
S02438	RISKY	simulated	16	272	2:solar	11	5.4	0.946	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.397 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.397 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.547 Hz
S03816	RISKY	simulated	25	272	4:solar9:solar	24.1	0.872	0.911	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.183 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.183 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01740	RISKY (confirmed)	simulated	20	272	1:solar3:solar4:solar6:solar	42.4	2.28	1.04	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.03 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.03 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.451 s; retried with step 0.00833 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.063 pu at bus 34 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.411 s failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.272 s) Time step reduced to zero. Convergence is not likely. (t = 1.272 s)
S04625	RISKY (unresolved)	simulated	26	272	5:solar6:solar7:solar9:solar	43.1	0.839	1.08	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) Time step reduced to zero. Convergence is not likely. (t = 1.000 s)
S03590	RISKY	simulated	3	271	4:solar7:solar	20.9	2.51	0.995	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.916 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.916 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00891	RISKY	simulated	21	271	1:solar3:solar4:solar9:bess	43.8	0.799	0.915	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.733 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.733 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.983 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02257	RISKY (confirmed)	simulated	25	271	5:bess7:solar8:solar9:solar	36.9	0.825	1.07	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.050 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.128 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.127 s) Time step reduced to zero. Convergence is not likely. (t = 1.127 s)
S00572	RISKY	simulated	27	271	5:solar6:bess9:solar	33.2	0.869	1.1	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.033 s > 0 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.033 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01850	RISKY	simulated	4	271	1:solar7:solar9:solar	30.2	0.826	0.92	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.534 s
S01919	RISKY	simulated	4	271	4:solar7:solar8:solar	26.4	2.46	0.967	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.488 s
S04060	RISKY	simulated	6	271	none	0		1.02	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.370 s
S02850	RISKY (confirmed)	simulated	19	271	none	0		1.03	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.476 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.103 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.409 s failed with step 0.00833 s: non-physical solution: voltage magnitude -0.103 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.412 s non-physical solution: voltage magnitude -0.103 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.398 s
S03770	RISKY	simulated	6	271	6:solar	11.7	3.27	1.01	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.370 s
S03895	RISKY (confirmed)	simulated	10	271	9:solar	13	0.892	0.957	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.387 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.271 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.271 s) Time step reduced to zero. Convergence is not likely. (t = 1.271 s)
S00228	RISKY (unresolved)	simulated	20	270	1:solar3:bess5:solar6:solar	40	2.49	0.957	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.029 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.270 s) Time step reduced to zero. Convergence is not likely. (t = 1.029 s)
S01418	RISKY	simulated	8	270	none	0		1.03	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.502 s
S01544	RISKY	simulated	24	270	2:bess6:solar8:bess9:solar	41.1	0.819	0.993	ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.450 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.450 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02950	RISKY	simulated	23	270	none	0		1.09	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.371 s
S02036	RISKY	simulated	8	270	8:solar	5.5	4.68	1.02	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.519 s
S00870	RISKY (unresolved)	simulated	20	270	1:bess3:bess5:solar7:solar	38.2	2.51	0.997	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.028 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.028 s) Time step reduced to zero. Convergence is not likely. (t = 1.027 s)
S00291	RISKY (confirmed)	simulated	10	270	none	0		1.1	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.353 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.270 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.270 s) Time step reduced to zero. Convergence is not likely. (t = 1.270 s)
S00550	RISKY (confirmed)	simulated	19	270	none	0		1.07	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.458 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.104 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.407 s failed with step 0.00833 s: non-physical solution: voltage magnitude -0.105 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.403 s non-physical solution: voltage magnitude -0.105 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.391 s
S00933	RISKY	simulated	10	270	none	0		0.919	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.359 s; retried with step 0.00833 s
S01643	RISKY	simulated	23	270	4:bess6:solar	22.7	2.47	0.913	ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 1.050 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 1.050 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03072	RISKY (unresolved)	simulated	2	270	1:solar4:bess8:bess9:solar	36.9	0.741	0.981	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.270 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.270 s) Time step reduced to zero. Convergence is not likely. (t = 1.270 s)
S00058	RISKY	simulated	29	270	2:solar3:solar4:bess	34.3	2.56	0.98	ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 1.100 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 1.100 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02389	RISKY	simulated	12	270	2:solar6:solar7:solar	32.5	2.3	0.94	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.333 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.333 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00101	RISKY	simulated	18	270	8:solar9:bess	18.4	0.848	1.09	frequency: zenith above 61 Hz; nadir 59.722 Hz, zenith 61.156 Hz
S00117	RISKY (confirmed)	simulated	10	270	4:solar6:solar	22.7	2.47	1.05	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.369 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.270 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.270 s) Time step reduced to zero. Convergence is not likely. (t = 1.270 s)
S01701	RISKY	simulated	6	270	5:solar6:solar8:solar	25.7	2.56	1.04	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.369 s
S03000	RISKY	simulated	29	270	1:solar3:solar5:solar	28.3	2.6	0.939	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.300 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.300 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00211	RISKY (unresolved)	simulated	19	269	5:solar	8.6	2.67	0.964	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.012 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.013 s) Time step reduced to zero. Convergence is not likely. (t = 1.013 s)
S00166	RISKY	simulated	6	269	none	0		0.927	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.401 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.401 s frequency: zenith above 61 Hz; nadir 59.874 Hz, zenith 61.848 Hz
S04455	RISKY	simulated	3	269	1:solar2:bess	18.4	4.76	1.08	ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.450 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 1.450 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01109	RISKY	simulated	3	269	1:bess2:solar4:bess	29.4	2.55	0.947	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.733 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.733 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 1.650 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01556	RISKY	simulated	20	269	none	0		1.09	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.418 s; retried with step 0.00833 s
S04815	RISKY	simulated	29	269	1:solar2:solar8:solar	23.8	3.55	0.922	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.333 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.333 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00468	RISKY	simulated	14	269	1:solar5:solar8:solar	21.5	2.61	1.03	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.434 s
S00984	RISKY	simulated	15	269	3:bess4:bess	23.4	2.61	1.03	ride_through:PRC-029-1_Table2_voltage: REG_BESS_3 (bus 10) voltage in (1.1, 1.2] for 1.033 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_3 (bus 10) voltage in (1.1, 1.2] for 1.033 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 1.167 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00454	RISKY	simulated	16	269	1:solar6:bess8:solar	24.5	3.1	0.959	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.416 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.416 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.542 Hz
S01358	RISKY	simulated	11	269	1:solar4:solar5:solar8:solar	32.5	1.82	0.992	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.401 s
S02966	RISKY	simulated	20	269	none	0		1.07	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.426 s; retried with step 0.00833 s
S04562	RISKY (confirmed)	simulated	10	269	4:bess	11.1	2.68	1.03	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.368 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.269 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.269 s) Time step reduced to zero. Convergence is not likely. (t = 1.269 s)
S04403	RISKY (confirmed)	simulated	5	268	3:solar	12.3	4.58	1.1	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.484 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.268 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.268 s) Time step reduced to zero. Convergence is not likely. (t = 1.268 s)
S03062	RISKY	simulated	23	268	none	0		1.01	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.423 s
S02293	RISKY	simulated	21	268	2:solar	11	5.4	1	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.667 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.667 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00268	RISKY	simulated	13	268	1:bess2:solar4:solar6:solar	41.1	2.32	1.03	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.389 s
S01523	RISKY	simulated	18	268	4:solar5:bess	19.7	1.91	1.06	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.082 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.082 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02395	RISKY	simulated	11	268	7:solar	9.8	3.44	0.976	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.401 s
S01979	RISKY	simulated	22	268	none	0		1.09	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.458 s
S04984	RISKY	simulated	16	268	1:solar	7.4	4.87	1.02	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.383 s
S01495	RISKY	simulated	18	268	7:bess8:solar9:solar	28.3	0.833	1.07	frequency: zenith above 61 Hz; nadir 59.804 Hz, zenith 61.074 Hz
S02403	RISKY (confirmed)	simulated	5	268	2:solar9:solar	23.9	0.886	1.08	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.438 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.268 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.268 s) Time step reduced to zero. Convergence is not likely. (t = 1.268 s)
S03658	RISKY (confirmed)	simulated	25	268	1:solar6:solar9:solar	32	0.821	0.947	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.017 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.268 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.268 s) Time step reduced to zero. Convergence is not likely. (t = 1.268 s)
S00556	RISKY	simulated	2	268	4:solar7:bess9:bess	33.9	0.854	1.07	frequency: zenith above 61 Hz; nadir 59.811 Hz, zenith 61.024 Hz frequency: zenith above 61 Hz; nadir 59.811 Hz, zenith 61.024 Hz ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.132 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00581	RISKY	simulated	18	268	2:solar	11	5.4	1.01	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.550 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.550 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00533	RISKY	simulated	20	267	6:solar	11.7	3.27	0.962	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.500 s; retried with step 0.00833 s
S04722	RISKY (unresolved)	simulated	17	267	2:bess7:solar8:bess9:solar	39.2	0.823	1.07	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.16 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.16 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.267 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.267 s) Time step reduced to zero. Convergence is not likely. (t = 1.267 s)
S01911	RISKY	simulated	21	267	1:solar3:bess	19.7	4.38	0.929	ride_through:PRC-029-1_Table2_voltage: REG_BESS_3 (bus 10) voltage in (1.1, 1.2] for 1.817 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_3 (bus 10) voltage in (1.1, 1.2] for 1.817 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00569	RISKY	simulated	6	267	4:solar7:solar	20.9	2.51	0.96	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.383 s
S00773	RISKY	simulated	11	267	none	0		0.955	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.416 s
S01984	RISKY (confirmed)	simulated	2	267	1:solar8:solar	12.9	3.63	1.04	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.16 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.16 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_1 (bus 2) voltage in (1.2, 9.99) for 0.036 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.267 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.267 s) Time step reduced to zero. Convergence is not likely. (t = 1.267 s) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_8 (bus 25) voltage in (1.2, 9.99) for 0.046 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04708	RISKY	simulated	13	267	none	0		0.932	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.433 s
S04790	RISKY (confirmed)	simulated	16	267	1:solar3:solar6:solar9:bess	44.3	0.804	1.04	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.06 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.06 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.397 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.267 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.267 s) Time step reduced to zero. Convergence is not likely. (t = 1.267 s) frequency: zenith above 61 Hz; nadir 59.937 Hz, zenith 61.543 Hz
S00429	RISKY	simulated	21	267	3:bess	12.3	4.58	0.918	ride_through:PRC-029-1_Table2_voltage: REG_BESS_3 (bus 10) voltage in (1.1, 1.2] for 1.683 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_3 (bus 10) voltage in (1.1, 1.2] for 1.683 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02964	RISKY	simulated	14	267	none	0		1.01	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.434 s
S03918	RISKY (confirmed)	simulated	10	267	8:solar	5.5	4.68	1.08	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.349 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.031 pu at bus 12 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.349 s failed with step 0.00833 s: non-physical solution: voltage magnitude -0.031 pu at bus 12 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.322 s Time step reduced to zero. Convergence is not likely. (t = 1.267 s)
S01145	RISKY	simulated	22	267	none	0		1.06	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.490 s
S04897	RISKY	simulated	13	267	2:solar4:solar	22	2.64	0.971	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.412 s
S01089	RISKY (unresolved)	simulated	23	267	3:solar7:solar9:solar	35.1	0.868	0.927	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.111 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.111 s) Time step reduced to zero. Convergence is not likely. (t = 1.111 s)
S03794	RISKY	simulated	8	267	1:solar4:bess7:bess	28.3	2.42	1.01	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.498 s
S02633	RISKY	simulated	7	266	1:solar4:solar9:bess	31.4	0.817	0.959	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_1 (bus 2) voltage in (1.1, 1.2] for 1.331 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_1 (bus 2) voltage in (1.1, 1.2] for 1.331 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 2.781 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03165	RISKY (unresolved)	simulated	23	266	2:bess7:solar	20.8	3.39	1	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.04 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.109 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.266 s) Time step reduced to zero. Convergence is not likely. (t = 1.109 s)
S03920	RISKY	simulated	7	266	6:solar	11.7	3.27	0.996	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.566 s
S00639	RISKY	simulated	13	266	2:solar4:solar	22	2.64	0.987	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.408 s
S00829	RISKY	simulated	5	266	1:solar	7.4	4.87	0.918	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.413 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.413 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.717 Hz
S02729	RISKY	simulated	4	266	9:solar	13	0.892	1.03	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.449 s
S04299	RISKY (confirmed)	simulated	5	266	7:solar	9.8	3.44	0.979	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.399 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.266 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.266 s) Time step reduced to zero. Convergence is not likely. (t = 1.266 s) frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.668 Hz
S01582	RISKY (confirmed)	simulated	5	266	6:solar	11.7	3.27	0.961	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.393 s; retried with step 0.00833 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.266 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.266 s) Time step reduced to zero. Convergence is not likely. (t = 1.266 s) frequency: zenith above 61 Hz; nadir 59.953 Hz, zenith 61.791 Hz
S00567	RISKY	simulated	19	266	7:solar9:bess	22.8	0.879	1.07	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.400 s; retried with step 0.00833 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.400 s; retried with step 0.00833 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.710 Hz
S01661	RISKY (unresolved)	simulated	29	266	4:bess8:solar9:bess	29.5	0.825	0.989	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.017 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.017 s) Time step reduced to zero. Convergence is not likely. (t = 1.017 s)
S01309	RISKY (unresolved)	simulated	19	266	4:bess5:bess7:solar8:bess	35	1.78	0.947	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) Time step reduced to zero. Convergence is not likely. (t = 1.000 s)
S04262	RISKY	simulated	25	266	2:solar	11	5.4	0.914	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.633 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.633 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03971	RISKY	simulated	7	266	1:solar	7.4	4.87	1.02	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.531 s
S04644	RISKY	simulated	6	266	5:solar	8.6	2.67	0.955	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.382 s
S02538	RISKY	simulated	13	266	1:solar8:bess9:bess	25.8	0.774	1.06	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.381 s
S01912	RISKY (unresolved)	simulated	29	265	6:solar7:bess9:bess	34.5	0.848	1.06	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.015 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.015 s) Time step reduced to zero. Convergence is not likely. (t = 1.015 s)
S03569	RISKY	simulated	20	265	2:solar4:solar	22	2.64	0.925	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.546 s; retried with step 0.00833 s
S04865	RISKY	simulated	23	265	1:bess4:solar5:solar	27.1	1.87	1.07	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.388 s
S00352	RISKY	simulated	3	265	5:solar7:solar8:solar9:solar	36.9	0.825	1.02	frequency: zenith above 61 Hz; nadir 59.782 Hz, zenith 61.022 Hz frequency: zenith above 61 Hz; nadir 59.782 Hz, zenith 61.022 Hz ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.033 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02399	RISKY	simulated	8	265	1:bess4:solar	18.5	2.6	1.07	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.464 s
S02780	RISKY (unresolved)	simulated	19	265	5:solar6:bess8:solar	25.7	2.56	0.985	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.011 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.012 s) Time step reduced to zero. Convergence is not likely. (t = 1.012 s)
S00390	RISKY (confirmed)	simulated	6	265	2:solar4:solar8:solar	27.5	2.59	0.922	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.783 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.265 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.265 s) Time step reduced to zero. Convergence is not likely. (t = 1.265 s) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.500 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03405	RISKY	simulated	20	265	none	0		0.988	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.479 s; retried with step 0.00833 s
S03213	RISKY	simulated	8	264	4:solar6:solar8:solar	28.2	2.42	1.04	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.480 s
S00724	RISKY	simulated	25	264	2:solar	11	5.4	0.972	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.350 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.350 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00618	RISKY (unresolved)	simulated	25	264	1:solar	7.4	4.87	0.985	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.15 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.15 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.264 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.264 s) Time step reduced to zero. Convergence is not likely. (t = 1.264 s)
S02446	RISKY	simulated	20	264	1:solar2:bess9:solar	31.4	0.834	0.911	ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 2.285 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_2 (bus 6) voltage in (1.1, 1.2] for 2.285 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02034	RISKY	simulated	20	264	4:solar7:solar8:solar9:solar	39.3	0.803	1	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.470 s; retried with step 0.00208 s
S02116	RISKY	simulated	23	264	5:bess	8.6	2.67	0.975	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.477 s
S01814	RISKY	simulated	4	264	1:solar5:solar6:solar8:bess	33.1	2.49	1.04	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.444 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.444 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.000 Hz
S03853	RISKY	simulated	17	264	3:solar5:bess6:solar	32.6	2.54	0.942	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.267 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.267 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S00358	RISKY	simulated	18	264	4:bess	11.1	2.68	1.08	ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 2.017 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_4 (bus 19) voltage in (1.1, 1.2] for 2.017 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03897	RISKY (confirmed)	simulated	19	264	3:solar6:bess7:bess9:bess	46.7	0.833	1.09	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.457 s sim_fail: failed with step 0.01667 s: non-physical solution: voltage magnitude -0.106 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.401 s failed with step 0.00833 s: non-physical solution: voltage magnitude -0.106 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.391 s non-physical solution: voltage magnitude -0.106 pu at bus 20 (numerical; would have been 'stopped_angle'); rotor-angle spread exceeded 180 deg at t = 1.385 s
S01549	RISKY (confirmed)	simulated	6	264	3:bess6:solar7:solar	33.8	2.27	1.02	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.542 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.264 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.264 s) Time step reduced to zero. Convergence is not likely. (t = 1.264 s)
S02463	RISKY	simulated	6	264	1:solar4:solar	18.5	2.6	0.955	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.392 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.392 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.874 Hz
S00922	RISKY	simulated	5	264	5:solar7:bess	18.5	2.6	1.03	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.372 s; retried with step 0.00833 s
S04867	RISKY (unresolved)	simulated	19	264	4:solar8:solar	16.5	2.63	1.06	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.11 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.11 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.043 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.043 s) Time step reduced to zero. Convergence is not likely. (t = 1.042 s)
S03090	RISKY	simulated	2	263	4:solar5:bess	19.7	1.91	1.04	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.417 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.417 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04170	RISKY	simulated	10	263	none	0		1.07	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.328 s
S03011	RISKY	simulated	6	263	8:solar	5.5	4.68	0.911	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.395 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.395 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.807 Hz
S01647	RISKY (confirmed)	simulated	10	263	1:solar4:solar5:solar9:solar	40	0.801	1.1	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.361 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.263 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.263 s) Time step reduced to zero. Convergence is not likely. (t = 1.263 s)
S03301	RISKY	simulated	21	263	3:solar5:bess	20.9	2.64	1.07	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.283 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.283 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S04076	RISKY	simulated	17	263	2:solar4:solar	22	2.64	1.06	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.350 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_2 (bus 6) voltage in (1.1, 1.2] for 1.350 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.883 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01655	RISKY (confirmed)	simulated	6	263	3:solar9:bess	25.3	0.883	0.92	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.083 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.263 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.263 s) Time step reduced to zero. Convergence is not likely. (t = 1.263 s)
S04503	RISKY (unresolved)	simulated	29	263	3:bess7:solar8:solar9:solar	40.6	0.818	1	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.017 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.017 s) Time step reduced to zero. Convergence is not likely. (t = 1.017 s)
S01013	RISKY	simulated	18	263	4:solar7:solar	20.9	2.51	0.958	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.183 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_4 (bus 19) voltage in (1.1, 1.2] for 1.183 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01949	RISKY (confirmed)	simulated	2	263	1:solar5:bess6:solar8:solar	33.1	2.49	0.956	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.16 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.16 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_1 (bus 2) voltage in (1.2, 9.99) for 0.049 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.263 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.263 s) Time step reduced to zero. Convergence is not likely. (t = 1.263 s) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_8 (bus 25) voltage in (1.2, 9.99) for 0.049 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S02790	RISKY	simulated	23	263	8:solar	5.5	4.68	0.986	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.463 s
S02842	RISKY (unresolved)	simulated	25	263	5:solar8:solar	14.1	2.65	0.944	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.15 pu is OK, so the bolted… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.15 pu is OK, so the bolted outcome is unknown: study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.154 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.153 s) Time step reduced to zero. Convergence is not likely. (t = 1.153 s)
S00407	RISKY (confirmed)	simulated	10	263	5:solar7:bess8:solar	23.9	2.58	1.08	bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.001 pu, faulted bus at 0.05 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.362 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.263 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.263 s) Time step reduced to zero. Convergence is not likely. (t = 1.263 s)
S01290	RISKY	simulated	10	263	7:solar	9.8	3.44	1.09	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.345 s
S04038	RISKY (confirmed)	simulated	2	262	2:solar8:bess9:solar	29.4	0.84	0.971	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.18 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.18 pu is already RISKY: ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_9 (bus 29) voltage in (1.2, 9.99) for 0.050 s > 0 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.262 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.262 s) Time step reduced to zero. Convergence is not likely. (t = 1.262 s)
S04174	RISKY	simulated	14	262	8:bess	5.5	4.68	0.982	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.479 s
S04249	RISKY	simulated	11	262	3:solar	12.3	4.58	0.908	ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.517 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_3 (bus 10) voltage in (1.1, 1.2] for 1.517 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S01840	RISKY	simulated	8	262	1:bess6:solar9:solar	32	0.821	0.937	ride_through:PRC-029-1_Table2_voltage: REG_BESS_1 (bus 2) voltage in (1.1, 1.2] for 1.432 s > 1 s… ride_through:PRC-029-1_Table2_voltage: REG_BESS_1 (bus 2) voltage in (1.1, 1.2] for 1.432 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09) ride_through:PRC-029-1_Table2_voltage: REG_SOLAR_6 (bus 22) voltage in (1.1, 1.2] for 2.247 s > 1 s (cumulative over 10 s); source: NERC PRC-029-1 Attachment 1 Table 2 (transcribed 2026-10-08; rows checked 2026-10-09)
S03641	RISKY	simulated	23	262	4:solar9:bess	24	0.872	0.994	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.460 s
S00105	RISKY (unresolved)	simulated	26	262	4:solar9:solar	24.1	0.872	0.913	bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial… bolted_fault: no milder rerun solved either (0.001 pu: sim_fail, 0.003 pu: sim_fail); study in a commercial RMS tool or EMT sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.000 s) Time step reduced to zero. Convergence is not likely. (t = 1.000 s)
S02346	RISKY	simulated	11	262	8:bess	5.5	4.68	0.957	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.410 s
S01935	RISKY	simulated	20	262	none	0		0.95	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.516 s; retried with step 0.00208 s
S02758	RISKY (confirmed)	simulated	6	262	1:solar3:solar5:solar6:solar	40	2.49	1.07	bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY:… bolted_fault: bolted run failed; milder fault x = 0.003 pu, faulted bus at 0.14 pu is already RISKY: angle_separation: rotor-angle spread exceeded 180 deg at t = 1.475 s sim_fail: failed with step 0.01667 s: Time step reduced to zero. Convergence is not likely. (t = 1.262 s) failed with step 0.00833 s: Time step reduced to zero. Convergence is not likely. (t = 1.262 s) Time step reduced to zero. Convergence is not likely. (t = 1.262 s)
S03070	RISKY	simulated	11	262	1:solar6:solar9:solar	32.1	0.821	0.906	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.461 s
S04856	RISKY	simulated	13	262	6:bess7:bess	21.5	2.35	1.07	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.377 s
S03032	RISKY	simulated	5	261	3:bess4:solar6:solar7:bess	44.9	1.93	1.01	angle_separation: rotor-angle spread exceeded 180 deg at t = 1.393 s angle_separation: rotor-angle spread exceeded 180 deg at t = 1.393 s frequency: zenith above 61 Hz; nadir 60.000 Hz, zenith 61.713 Hz

Risk versus IBR share

Share of RISKY scenarios for each band of IBR share of generation, with the number of scenarios in each band.

0–10%

18% RISKY (265 of 1443)

10–20%

37% RISKY (370 of 1013)

20–30%

40% RISKY (416 of 1042)

30–40%

47% RISKY (465 of 992)

40–60%

55% RISKY (280 of 509)

60% +

no scenarios

Trajectories

Voltage, rotor-angle spread, frequency and IBR current for the riskiest scenarios. Pick a scenario to watch it play out; hover or touch a chart to read values at that moment.

Download PNG

Model card

# Model card: IBR-FaultScreen screening classifier

- Model: `gbm`; decision threshold 0.03681 on P(RISKY)
- Trained on 4599 scenarios (1396 RISKY); dataset SHA-256 `7e6e732e1a1a5d0782f476d2a0fc985b7069da057fe2a927296990e1f63eb090`
- Versions: ibr-faultscreen 0.1.0, scikit-learn 1.9.1

## Intended use

Rank many fault scenarios so the riskiest are simulated and studied first. Every RISKY result shown to users is re-simulated (screen-then-verify). Not for use without simulation, and not a substitute for an interconnection study.

P(RISKY) is a ranking score, not a calibrated probability: the models are trained with class balancing and the threshold is set for recall, so a low threshold is expected. The calibration bins are in `evaluation.json`.

## Evaluation (honest)

GroupKFold by fault bus, 5 folds (nested). Recall target on RISKY: 0.95. Threshold tuned inside each training fold. AP = average precision.
Scenarios left out because their outcome is unknown: 401.

| Model | Recall | Precision | AUC | AP | Brier | Share flagged | TP/FP/FN/TN |
|---|---|---|---|---|---|---|---|
| rule | 0.95 | 0.46 | 0.784 | 0.532 | 0.305 | 0.63 | 1330/1555/66/1648 |
| logistic | 0.95 | 0.39 | 0.801 | 0.589 | 0.181 | 0.73 | 1322/2051/74/1152 |
| gbm | 0.97 | 0.48 | 0.867 | 0.692 | 0.158 | 0.62 | 1349/1482/47/1721 |

Model check (recall near the target and better ranking than the simple rule, on unseen fault locations): PASS. gbm: recall 0.97, precision 0.48, AUC 0.867, AP 0.692 | rule: recall 0.95, precision 0.46, AUC 0.784, AP 0.532

Extrapolation (train n_ibr <= 2, test n_ibr > 2):

| Model | Recall | Precision | AUC |
|---|---|---|---|
| rule | 0.85 | 0.51 | 0.690 |
| logistic | 1.00 | 0.42 | 0.698 |
| gbm | 0.98 | 0.49 | 0.814 |

### Study effort

Share of scenarios the `gbm` model sends to simulation for each recall target (held-out fault locations). The rest are passed without simulation.

| Recall target | Recall reached | Share flagged |
|---|---|---|
| 0.90 | 0.913 | 0.53 |
| 0.95 | 0.966 | 0.62 |
| 0.99 | 0.996 | 0.76 |

### Scenarios with an unknown outcome

Of 400 scenarios the solver could not settle (left out of training), the model alone would send 77% to simulation. Whether the solver fails depends mostly on the fault location, so the screen always verifies scenarios at solver-hard fault buses (below).

### Solver-hard fault buses

Buses where at least 20% of the dataset's scenarios ended with an unknown outcome. `screen` always simulates scenarios at these buses and at buses not in the dataset.

| Fault bus | Scenarios | Unknown outcome |
|---|---|---|
| 19 | 172 | 61 (35%) |
| 16 | 173 | 55 (32%) |
| 25 | 173 | 50 (29%) |
| 6 | 172 | 45 (26%) |
| 26 | 173 | 37 (21%) |

## What drives the predictions

Permutation importance (drop in AUC on held-out fault locations):

| Feature | Importance | Std |
|---|---|---|
| `clear_time_s` | 0.223 | 0.021 |
| `fault_v_pre_pu` | 0.047 | 0.022 |
| `scr_min` | 0.045 | 0.022 |
| `z_fault_ibr_min_pu` | 0.042 | 0.011 |
| `ibr_share` | 0.038 | 0.018 |
| `z_fault_gen_min_pu` | 0.023 | 0.012 |
| `fault_sc_mva` | 0.013 | 0.008 |
| `inertia_h_s` | 0.010 | 0.005 |
| `load_scale` | 0.009 | 0.007 |
| `ibr_mw` | 0.003 | 0.003 |
| `inertia_mws` | 0.002 | 0.002 |
| `n_ibr` | 0.000 | 0.000 |
| `total_load_mw` | 0.000 | 0.000 |
| `fault_x_pu` | 0.000 | 0.000 |

## Limits

- Learned from RMS simulations of one test system with generic IBR models.
- Fault locations never seen in training are the honest test; new networks are not covered until retrained on them.
- Labels inherit every limit of the criteria file and the dataset.

Limits

Screening only: it ranks contingencies for detailed study and does not replace an interconnection study.
RMS positive-sequence simulation (ANDES): no EMT effects, balanced faults only.
Generic WECC IBR models (REGCA1/REECA1/REPCA1), not a specific manufacturer.
Results depend on the criteria file; check its sources before relying on a verdict.