JSIS Report for PCC Donald Davies for Dmitry Kosterev, JSIS Chair W ESTERN E LECTRICITY C OORDINATING C OUNCIL

JSIS Activities Oscillation Modes – embarking upon studies to relate oscillatory modes, damping to system conditions including flow levels for various simulated systems Oscillation Analysis – review current system events. Review plots from PMU for interesting behavior 2 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

JSIS Activities Improve Data Quality – Correct issues – Tools to detect and handle bad data including Linear State Estimator Operations and Engineering Analysis tools 3 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

JSIS Activities Presentation from Peak, GE, WECC regarding Simulations with Westwide System Model (WSM) Cases – WSM (West-wide System Model) – node-breaker model used by Peak to run RTCA and next day studies; – WSM Cases including dynamics data are posted in at PeakRC.org for operating entities to download. Cases can be loaded into PSLF to provide for planner access including dynamics studies 4 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

Simulations with WSM Results – April 28 th – PDCI loss – May 28 th – Garrison-Taft line reclosing; – June 17 th –Chief Jo brake test; 5 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

 At 6:06 PDCI tripped, RAS activated dropping 1708 MW in Pacific Northwest  System Frequency dropped to Hz  Sequence of events from BPA (not official): – sec – PDCI pole 3 power change from 827 to 489 MW – sec – PDCI pole 4 power change from 827 to 508 MW – sec - PDCI pole 3 and 4 power change to 0 MW – sec – insert Fort Rock series capacitors – sec – RAS gen.drop  Additional comments:  Poles 1 and 2 out;  Olinda CB3096 closed (cap in), CB 5492 open (reactor out)  Tracy CB 1292 and 2292 opened (caps out) 3592 closed (reactor in), CB 1392 and 2392 closed (caps in) April 28, 2015 Disturbance

 RAS gen. drop: – April 28, 2015 Disturbance RAS: GCL CKT2254 RAS: GCL CKT3149 RAS: CHJ PH RAS: CHJ PH RAS: CHJ PH RAS: MCN LINE140 RAS: MCN LINE245 RAS: MCN LINE3& RAS: MCN LINE5144 RAS: TDA PH352 RAS: TDA PH656

PSLF simulation (WSM node-breaker) vs. PMU – Preliminary Results Celilo

Results using updated dynamic model (inclusion of BPA updates and UEL); MALIN Voltage

Results using updated dynamic model (line Vincent Midway tripped); Additional shunt switching needs to be modeled: Olinda 500 kV CB3096 closed (capacitor in) and CB 5492 opened (reactor out) Tracy 500 kV CB 1292 and 2292 opened (caps out) and 3592 closed (reactor in) Tracy 500 kV CB 1392 and 2392 closed (capacitors in in)

Results using updated dynamic model (inclusion of BPA updates and adding UEL and removing line Vincent Midway); Summerlake-Hemingway flow

Results using updated dynamic model (inclusion of BPA updates and adding UEL and removing line Vincent Midway); COI Flow

Results using updated dynamic model (inclusion of BPA updates and adding UEL and removing line Vincent Midway); GARRISON-TAFT Flow

Results using updated dynamic model (inclusion of BPA updates and adding UEL and removing line Vincent Midway); NAVAJO Voltage (5 kV difference between SCADA and PMU), HASSYYAMPA ( 8 kV difference between SCADA and PMU),

Results using updated dynamic model (inclusion of BPA updates and adding UEL and removing line Vincent Midway);

 Case will be posted at peakrc.org;  We can start using WSM snapshots in node breaker format (we have tool, PMUs, cases);  Results are reasonable, we need more simulations to gain more confidence and to improve models;  It is much faster to prepare case; April 28, 2015 Disturbance

May 28, 2015 Disturbance  Here is what do we see from PMU data:  About 12:38:50.65 – Taft voltage jumps 25-kV, Garrison jumps only about 8-kV, no MW flow on Garrison – Taft #2, no MVAR flow on Garrison end, 500 MVAR flow from line to bus at Taft end – clearly line is energized at Taft  About 12:38:53.9 – looks like line is closed from Garrison  About 12: – looks line opened at Garrison  About 12:39:08.35 – line closed again at Garrison  About 12:39:09.05 – line opened again at Garrison  Peak did not see action of PCBs on Garrison side since there was maintenance on this breakers so ICCP was probably disabled;

PSLF simulation (WSM node- breaker) vs. PMU

Chief Joseph Brake Inerstion Four insertion on June 17, 2015; Cases will be posted on peakrc.org; June 17 Chief Joseph Brake

Results: