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

2. 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

3. 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

4. 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

5. Model Implementation Schedule
No new models to report
Keep focusing on Phase 2 wind models
Western Electricity Coordinating Council

6. 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

7. 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

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

9. 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
Western Electricity Coordinating Council

10. Western Electricity Coordinating Council
SAMS MOD 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
Western Electricity Coordinating Council