MVWG Report to TSS April 2012

1. MVWG Report to TSSApril 2012 Stephanie Lu Puget Sound Energy

2. Presentation Overview • WSM and BCS Reconciliation Task Force • Typical Machine Data Document • Generator Testing Policy & Guidelines • Approved Dynamic Model List • Load Modeling • System Model Validation • Generator Modeling, Testing, and Validation • Renewable Generation Modeling • HVDC Modeling • Transient Stability Program Benchmarking • Next Meeting

3. New Task Force – WSM and BCS Reconciliation • See Slaven Kincic’s presentation • See WBRTF charter WBRTF Draft Charter.docx • Motion: Approve the charter for the new WSM and BCS Reconciliation Task Force (WBRTF).

4. Typical Machine Data • See Typical Machine Data document Typical Machine Data.pdf • See proposed changes to document Typical Machine Data_AE comments 4-10-12.doc • Motion: Approve the Typical Machine Data document with proposed changes.

5. Generator Testing Policy • See Generating Unit Model Validation Policy document with proposed changes WECCGeneratingUnitModelValidationPolicy v.3-22-12.docx • Motion: Approve the WECC Generating Unit Model Validation Policy with the proposed changes.

6. Generator Testing Guidelines • Proposed consolidation into a single document: • Generating Facility Model Validation Requirements • With minor changes • Generating Unit Baseline Test Requirements • Add sub-section 1.d for V-curve data as discussed • Add wind and solar generator testing requirements • Generating Facility Data Requirements • Add non-synchronous generator data requirements • Over Excitation Limiter (OEL)/Over Excitation Protection (OEP) Testing Requirements • To be reviewed and updated • Generator Test Exemption Procedure (no changes) • The proposed changes will be up for discussion and approval at the next M&VWG meeting.

7. Approved Dynamic Models List • March 2012 Update – Moved motor1 model to approved list under load models. This is not to be used anymore for wind models. • Latest version: WECCApprovedDynamicModelLibraryMarch2012.pdf

8. Load Modeling

9. Load Modeling Overview • Status of Phase 1 Implementation Plan • Review and Updates to Composite Load Model Data and Tools • Validation and System Impact Studies • Next Steps

10. Status of Composite Load Model Implementation Plan Phase 1 (cont.)

11. Status of Composite Load Model Implementation Plan Phase 1 (cont.)

12. Status of Composite Load Model Implementation Plan Phase 1 (cont.) • For the 12HS4 case, about 300 loads had invalid or missing LIDs and therefore did not have a dynamic model record created for it • Corrections for missing, invalid, and incorrect LIDs have been requested of SRWG and an updated dyd will be posted when available

13. Composite Load Model Data and Tools M 12.5-kV 13.8-kV M 69-kV 115-kV 138-kV M AC UVLS Electronic UFLS Static

14. Load Model Composition – Long ID (LID) • LID Instructions has been updated to include a map of the climate zones • Posted on the WECC website in the MVWG LMTF Document folder as “LID_Instructions_2012-4-10.pdf”

15. Load Model Data Tool LMDT3A • Tool updated with a new epcl to check the validity of the LIDs, and reports the loads with invalid or missing LIDs • User instructions manual also updated • To be posted on the WECC website in the TSS Base Case section in the Year 2012 GE PSLF folder

16. Load Composition Model Tools • PNNL is developing the “next generation” LCM tool • Combines the ease of interface of the WECC light model and ability to create a dyd file with the computational capabilities of the full PNNL model, including the capabilities of validating the load shapes

17. Load Model Validation and System Impact Studies

18. Load Model System Impact Studies • BPA, PSE, and CalISO presented additional study results • From BPA’s study, the tripping of 3-phase motor loads may be more optimistic in oscillation studies

19. Next Steps

20. Next Steps • Phase 1: See implementation plan • Phase 2: • Perform additional sensitivity studies • Continue work on determining protection settings • Continue work on understanding the phenomenon of air-conditioner stalling in distribution systems (supported by DOE and LBNL) • Continue collecting disturbance recordings for validation, e.g., SCE’s PQube recordings • Provide recommendations for changing the voltage dip criteria • Continuous: Model validation

21. System Model Validation

22. System Model Validation Studies System model validation is a priority of MVWG and a deliverable under the Western Interconnection Synchro-phasor Program System model validation is part of the NERC Model Validation Working Group efforts Major impediment: Validation base case development Solution: Automate the process of base case development Leverage West-wide System Model (WSM)

23. System Model Validation Studies WECC Powerflow Case: Bus-branch Bus number, ID WSM Powerflow Case: Node-breaker-element Element Code 2 WECC Dynamic Database: Bus number, ID WSM Dynamic Database: Element code, node 1

24. System Model Validation Studies • Option 1 (WECC is working on the contract): • Convert WECC dynamic data base to “element code” definition consistent with WSM (one time effort) • Validation studies are done using WSM powerflow case and the new dynamic data file • Option 2 (developed by MVWG resources): • Map generation, loads and equipment status from WSM to WECC powerflow case • Validation studies are done using WECC powerflow case and existing dynamic database

25. WSM and BCS Reconciliation Task Force (WBRTF) The task force will improve the ability to leverage the WSM for system model validation studies Some members from M&VWG and SRWG have volunteered to participate in this newly proposed task force

26. Generator Modeling, Testing, and Model Validation

27. Synchronous Generator, Excitation and Turbine Control Models Power Plant Model Data Task Force OEL, UEL and generator protection models Turbine-governor models Power Plant Model Validation

28. Power Plant Model Data Task Force • Review existing data • Data errors are to be sent to Kent Bolton for compilation, as a first step to addressing the errors • Improve data checking and processing of new data • WECC will begin using the data checker developed by John Undrill • John Undrill will enhance the data checker and provide it to WECC members for their use

29. Power Plant Model Data Task Force (cont.) • Develop processes and tools to improve coordination between GOs and TPs for submitting data • The concept of an ‘alert’ was discussed as a way to share the compiled data errors and work with the GOs and TPs • Review the existing WECC power plant model validation guidelines and recommend improvements • Currently under review

30. Excitation Models - OEL • OEL1 was determined to have the required functionality • Has fixed, and instantaneous limits, fixed time or inverse, ramped or immediate • Has no dynamics – bypasses exciter to a fixed Efd set point – usually adequate for long term reactive supply studies • Is a takeover limiter without need for tuning • Pickup timing does not reset

31. Excitation Models – OEL (cont.) • Short term recommendation: • Use OEL1 model and implement in all programs • Make changes to existing exciter models, as needed, to make it compatible with OEL1 (not compatible with all es type models) • Some further validation work comparing OEL1 to actual OELs • Provide default OEL1 model for each generator that does not already have one (alarm only) • Longer term recommendation: • Incorporate limiters into the excitation models

32. Excitation Models - UEL • UEL1 and UEL2 already exist • Recommendation: Implement UEL1 and UEL2 in all programs

33. Turbine-Governor Model • “Baseloaded” flag of 1 blocks the governor from responding upward • Addresses actual generator response during underfrequency situtations • Through disturbance recordings, baseloaded units also do not respond downward • Short-term recommendation: Implement a baseload flag of 2 to block governor response in both directions • Mid-term recommendation: Review power plant operational information and revise implementation to appropriately model “baseloaded” practices

34. Power Plant Model Validation Power Plant Model Validation (PPMV) version 1B using PSLF play-in function is available on the WECC website in the MVWG PPMDTF Documents site

35. Wind Generation Modeling

36. Status of Wind Modeling Effort PSLF/17 PSSE/32 Version 1 of wind generic models implemented as library models in PSSE, PSLF and other platforms

37. Phase 2 of wind model development – Model structure improvements • Type 1 and 2: • Pitch model redesigned • Good validation against MWT1000A • Partial validation against V82-AGO5 is driving the need to better emulate acceleration control • Type 4: • Model specifications approved by REMTF with minor modifications (e.g. additional features to P/Q control and plant control) • Excluding plant level controls, validation work shows good results for multiple manufacturers (Siemens, Vestas, and ABB, and simulated cases from ENERCON)

38. Phase 2 of wind model development – Model structure improvements • Type 3: • Identical to Type 4 except for the addition of pitch and torque control and simplified aero-dynamic model • Initial validation with Vestas and ABB look good, data also received from RePower • Specifications are planned to be completed by June • All 4 wind models are expected to be up for approval at the November MVWG meeting.

39. PV Generation Modeling

40. Large PV Power Plant Modeling • Specifications for the PV1X (PV1E and PV1G) models are nearly complete • It is a full featured model based on the WECC Type 4 wind generation model • Consistent with the WECC PV Modeling Guide, the feeder or collector system equivalent should be included in the power flow model for large PV plants

41. Distributed PV Modeling • Specifications for the PVD1 stand alone model are nearly complete • PVD1 is a more basic model than PV1X and is intended to represent the aggregate effect of distribution-connected PV at the transmission level • REMTF proposed a simplified version of PVD1 to be added to the CMPLDW to create a CMPLDWg model. This still needs to be coordinated with LMTF, SRWG, NERC MVWG and the program vendors.

42. HVDC Modeling

43. HVDC Modeling • The task force has started with the point-to-point Conventional and Voltage Source Converter (VSC) HVDC models • Conventional point-to-point HVDC • Powerflow model already exists, documentation is being improved • Tap control logic can be used for multiple controls in PSLF, and the logic will be shared with the other program vendors • Dynamic model design for rectifier and inverter has been identified • VSC point-to-point HVDC • Powerflow model specifications have been agreed upon • Ideas for the dynamic model are being discussed • A working draft of the document is in progress

44. HVDC Modeling Issues • Trans Bay DC Modeling • PG&E is in contact with TBC Operations to get test data to be used for model validation • PDCI Modeling • LADWP needs to provide an as-built model and run validation of the model and current control at Sylmar

45. Transient Stability Program Benchmarking

46. Transient Stability Program Benchmarking • PSE shared results from benchmarking studies comparing PSLF, PSS®E, and PowerWorld • PSE will work with the program vendors on identifying reasons for the differences

47. Next Meeting

48. March Meeting Layout From March experience: Need to eliminate task force schedule overlap Overlap with SRWG not preferable M&VWG LMTF M&VWG REMTF M&VWG M&VWG M&VWG Utility Mtg SRWG Breakout 1 SRWG Breakout 1 SRWG SRWG M&VWG PPMDTF SRWG Breakout 2 SRWG Breakout 2 SRWG Breakout 3 SRWG Breakout 3 HVDCTF met prior to the M&VWG meeting. Maxwell Room Edison/Fermi Rooms Tesla Room

49. Next Meetings – Proposed for June Achieves: Eliminates overlap of task force meetings Minimizes overlap with SRWG M&VWG REMTF M&VWG REMTF M&VWG M&VWG SRWG Breakout 1 SRWG Breakout 1 SRWG SRWG SRWG Breakout 2 SRWG Breakout 2 SRWG Breakout 3 SRWG Breakout 3 HVDCTF, PPMDTF, and LMTF will meet independently from the main M&VWG meeting, as needed. Maxwell Room Edison/Fermi Rooms Tesla Room

50. Upcoming Workshops/Training? • Joint Training Session with SRWG and Program Users Work Groups?