Jonathan Young, SDWG Chair August 2018 Chair Report Jonathan Young, SDWG Chair Western Electricity Coordinating Council

Western Electricity Coordinating Council Agenda DS Approvals DPM Changes 2018/2019 Comp Schedules Model Implementation Schedule Link MVWG Update NERC SAMS Node Breaker Modeling pilot Update NERC MOD-032 Group Western Electricity Coordinating Council

Approved DPM Change Requests DS approved the Bus Low/High Voltage Limits Change Request with the alteration below. Field Description Requirements Vmax Maximum pre-contingency System Operating Limit (SOL) voltage provided to applicable Reliability Coordinator (pu) If the bus is not included in SOL submittals the software’s default value of should be used. Vmin Minimum pre-contingency System Operating Limit (SOL) voltage provided to applicable Reliability Coordinator (pu) Western Electricity Coordinating Council

Approved DPM Change Requests DS approved the addition of Gridliance West Transco LLC (GWT) to Valley Electric Association, Inc (VEA) Area without alterations. Western Electricity Coordinating Council

Model Implementation Schedule No new models to report Keep focusing on Phase 2 wind models https://www.wecc.biz/Reliability/WECC-Approved-Dynamic-Model-Implementation-Schedule-v4.1.xlsx Western Electricity Coordinating Council

Western Electricity Coordinating Council MVWG Update DER_A stand-alone model approved in Jan 2018 CMPLDW + DER_A model approval delayed Expected approval in November Latest approved dynamic model library May 2018 Western Electricity Coordinating Council

Western Electricity Coordinating Council MVWG Update Momentary Cessation “Most characteristics of momentary cessation can be modeled using the second‐generation generic renewable energy system models: regc_a, reec_a Voltage‐dependent active and reactive current reduction: VDL1 and VDL2 in reec_a Low voltage power logic switch: lvplsw=0 in regc_a Ramp control of active and reactive current: rrpwr, Iqrmax and Iqrmin in regc_a Active and reactive current control priority: pqflag = 1 if active current priority; = 0 if reactive current priority in reec_a Voltage dip logic: Vdip = Vmc‐lv and Vup = Vmc‐hv in reec_a Recovery delay: thld2 in reec_a” Western Electricity Coordinating Council

Western Electricity Coordinating Council MVWG Update Momentary Cessation Working on a new REEC model for a long term solution Western Electricity Coordinating Council

SAMS Node Breaker Modeling Pilot Update provided at August 2nd SAMS meeting Reviewing draft NDA to share data in this group The modeling group started with PSSE models in the East Coast Model Issues seen with trying to model Node Breaker topology for multiple switched shunts on the same powerflow bus Crashing occuring when modeling a Node Breaker substation that has a VSC DC device. Looking for volunteers to expand with PowerWorld and GE PSLF models To participate contact Jonathan Young young@columbiagrid.org Western Electricity Coordinating Council

Western Electricity Coordinating Council SAMS MOD 032-1 Group NERC System Analysis and Modeling Subcommittee (SAMS) is performing an assessment of industry practices around base case model building to understand the current state-of-the-art practices for each PC area and their interconnection. Identify seminaries and differences among practices and provide recommendations for consistency. Continue to Develop questionnaire To participate contact Jonathan Young young@columbiagrid.org Western Electricity Coordinating Council