1. Slaven Kincic MVWG March 2016

2. 2 System Model Validation Task Force (SMVTF) System Events for System Model Validation o 21th January event:  Colstrip RAS testing  System Model Validation Discussion on MOD 33 Overview:

3. 3 The Task Force shall focus on the following areas: Select disturbance events and develop disturbance cases Review the process of developing cases; Perform system model validation studies Provide recommendations to improve modeling SMVTF

4. 4 Have a communication mechanism in place to send out notification of the disturbance events Have a communication mechanism in place to send out notification when a disturbance basecase is developed and ready for use (PC can choose to leverage those developed basecases or develop their own for MOD- 033 compliance) SMVTF

5. 5 Create and maintain list of disturbance events, reports and presentations (i.e. SMVTF tab at the MVWG page) Create and maintain archive of event cases Conduct educational workshops SMVTF

6. 6 Thursday March 3, 2016 15:05 PST. WECC Transfer Path 65 (PDCI) and Transfer Path 66 (COI) limited and system frequency to 59.792 Hz momentarily and normal in nine minutes when BPA Ashe-Marion and Buckley- Marion 500 kV Lines relayed tripping 1491 MW of Pacific Northwest generation and, 28 seconds after the NW Gen Drop event, SRP Navajo Units 1 and 3 relayed while carrying 805 MW total. System Event 1:

7. 7 March 3 rd 15:05 PST

8. 8 System Event 2: Time (MST)Event 02:08:54.614B-phase fault at an unknown location on the Colstrip – Broadview 500 kV “A” line. At the time, the Colstrip – Broadview 500 kV “B” line was standing open. The “A” line series caps were bypassed at the time. The following is the sequence component currents and voltages the relay recorded at Colstrip: ValueMagnitudeAngle I01149.1150.3 I12056.1324.3 I21193.529.5 V015.857.9 V1263.34.8 V239.6296.6 02:08:54.648Colstrip 500-001 and 500-002, and Broadview 500-010 open to isolate the Colstrip – Broadview 500 kV “A” line. 02:08:54.787ATR opens Colstrip 500-004, 500-005, 500- 006, and 500-007 (Colstrip Units 3 and 4)

9. 9 We prepared PSLF case using WSM (Donald, Brian); Event sequence ( provided by Eric) Epcl for simulation sequence (Brian) PMUs (provided by Dmitry) WECC staff works on WECC basecase (James, Doug); Case sent to PowerWorld; Methodology

10. 10 We took TSAT archived case prior to event; Simulate fault and line tripping; We want to see if ATR Model will trip same units as it happened during event (Fred); We test at the same time ATR Model together with WSM and dynamic model; All cases will be posted on peakrc.org Methodology

11. 11 RAS Model Data Files: Colstrip_atr.dat, Colstrip_atr_Combotrip.dat and Colstrip_atr_trip13sl.dat –Relay Function: o Monitoring: Behaviors of 4 Colstrip units o Individual Unit Trip: Disconnect overspeeding unit(s) with 2 cycle delay o Trip Arbitration: Disconnect certain percentage of MW according to observation of oscillation, acceleration and angle separation. –Runtime Logic : o Online MW includes MW tripped within 0.5 seconds o Trip requirement excludes MW tripped within 0.5 seconds –Preference Switch: o Unit 1 preferred over Unit 2 o Unit 3 preferred over Unit 4 o Small unit preferred over large unit o Large unit proffered over two small unit

12. ATR RAS Actions on Field Event 12

13. 13 January 21th 2016 event

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31. 31 January 21th 2016 event

32. 32 Baseload flag; Governor dead-band setting; Withdrawal of primary frequency response; Available headroom; AGC; We need to net a lot of wind farms; Thinks that make difference:

33. 33 White Paper: o Underline current practice; o How to improve process of creating cases and sharing data; o How to analyze cases and hot to interpret results MOD 33 discussion:

34. 34 o Ex: Desert Sunlight o 16hw3a: 24963 (110 MW), 24965 (140 MW), 24964 (110 MW), 24966 (140 MW) o 16HS3a: 24967 (22 MW), 24968 (226 MW), 24969 (80.6 MW), 24970 (219 MW) SCE model review

35. 35 April 28, 2015 (additional pick up on COI)

36. 36 April 28, 2015 (additional pick up on COI) Problem isolated and dyd file and WECC basecase suppose to be corrected: Details of modeling issues/errors There are 4 units modeled in this Topaz solar farm in the planning case with the following MVA bases · 233 MVA / 48 MVA / 36 MVA / 245 MVA In the May 28 th WSM case, these 4 unit were dispatched to · 114.5 / 159.1 / 152.1 / 126.5 MW In the PG&E SE model 22 separate units (error in WECC basecase and dyd – corrected)