1. System Review Work Group Update to TSS
John Gross, SRWG Chair
Presented to TSS Aug 24-26, 2016
Western Electricity Coordinating Council

2. Base Case Compilation Schedule
2017 Schedule is approved and ready for use
Preparing for 2018 Schedule
Review how interchange targets are developed
Evaluate grouping of similar cases in 2017 schedule
Annual survey to be sent at end of year
Western Electricity Coordinating Council

3. Data Preparation Manual
2017 DPM is approved and ready for use
PCC amended approval from TSS approval
Remove proposed change to require explicit bypass modeling
Remove proposed change to not allow multi-section lines
Changes to focus on for 2017 data submission
Balancing Authority data
Substations
RAS models
TSS should request PCC to delegate approval of DPM to TSS
Western Electricity Coordinating Council

4. Western Electricity Coordinating Council
Balancing Area
Why can’t we use existing Area to represent Balancing Areas?
Western Electricity Coordinating Council

5. Representation Log Five year trend of total Representation Log counts
Western Electricity Coordinating Council

6. Western Electricity Coordinating Council
Representation Log
Recent trend by Area
Western Electricity Coordinating Council

7. Western Electricity Coordinating Council
17HW to 17LW
Why don’t they match?
Western Electricity Coordinating Council

8. Western Electricity Coordinating Council
NERC SAMS Case Metrics
Case metrics developed by NERC
Criteria WECC is not monitoring in replog or case checks
Steady State
Conflicting voltage control setpoints
Ratio tap step/voltage bandwidth > 1.25
Rate A <= Rate B
Rate B/Rate A < 3
Qgen <> (Qmax or Qmin)
Generator power factor > 0.85, Load power factor > 0.5
Parallel transformers with circulating current
Generator Rsource/Xsource < 1
Dynamic
No exemption for missing generator model
Xd’’ < Xd’ < Xd, Td’’ <= Td’ and Tq’’ <= Tq’
1.5 <= Generator inertia <= 9
Reasonable saturation factors
0.03 <= S(1.0) <= 0.12
0.2 <= S(1.2) <= 0.8
S(1.2) should be within 2 to 8 times S(1.0)
Unit with PSS model should have excitation model
Should SRWG add above criteria to replog?
Phase 1 Case Metrics
Phase 2 Case Quality Metrics
SAMS - System Analysis and Modeling Subcommittee
Western Electricity Coordinating Council

9. Non-Registered Entity Modeling
How do we (WECC) get good model data for non-registered NERC entities?
Generator Owner: 20 MVA single, 75 MVA plant
Radial systems and local networks
Should the WECC cases exclude “non-registered” facilities?
More detailed model would be used for local studies
If TP and PC have a more detailed model then why not include it in the WECC cases?
PC should determine what is appropriate to model
How do we improve data quality if no entity is responsible?
Western Electricity Coordinating Council

10. Posting PowerWorld Cases
WECC Staff to report
Western Electricity Coordinating Council

11. Model Implementation Schedule
Schedule posted
Phase 2 renewable models
Overcurrent relay modeling
Status of DIRECLEN – directional overcurrent model?
Western Electricity Coordinating Council

12. RAS Data Submittal (Slide copied from May meeting)
Stipulation and Consent Agreement following September 8, 2011 Outage
35. By March 31, 2016, WECC will have developed the capability for entities to model RASs so that they can be added to its powerflow base cases.
PowerWorld-Done, PSLF-Almost, PSSE-?
By June 30, 2016, WECC will update the Data Preparation Manual to include the requirement for data submitters to include RAS models in their submittal to WECC.
Approve the 2017 DPM
WECC will produce the first powerflow base case to include RAS models by July 2016.
Entities submit RAS models and WECC produce a base case with the data
Posted RAS Files
By June 30, 2017, all WECC base cases shall include all (1) RASs, and (2) overcurrent protection relays with inter-TOP impact, known to WECC to exist in the Western Interconnection as of the Effective Date. In the interim, WECC collected and posted so me data on RASs and relays with inter-TOP impact so that entities can model those impacts until those RASs and relays are modeled in the WECC base cases. Any RASs installed in the Western Interconnection after June 30, 2016 and known to WECC to exist shall be modeled in the base cases as soon as practicable in coordination with WECC’s established base case production schedule.
Continue submitting RAS models
Western Electricity Coordinating Council

13. Western Electricity Coordinating Council
Upcoming SRWG Meeting
Focus on training
WECC case building process
Complying with the DPM
Relay Modeling
Phase 2 renewable models
GIC data collection
Jumper threshold
Area interchange
Transformer modeling
Begin executing recommendations from the BCCS Alternatives Task Force
Review revised 2016 Annual Study Report
Work on 2018 Data Preparation Manual
Work on 2018 Base Case Compilations Schedule
Appoint new leadership positions
Western Electricity Coordinating Council