1. System Review Work Group Update to TSS John Gross, SRWG Chair Presented to TSS May 17, 2016 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

2. SRWG Priorities Work Plan being development Identify list of tasks/issues Describe effort and benefits of each item Prioritize list 2 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

3. 2017 Base Case Compilation Schedule Approval Item: 2017 Base Case Compilation Schedule Grouped timeline for similar cases – Reduce topological differences – Improved efficiency Due Dates – Replaced Area Coordinator with Data Submitter – Removed Sub-Coordinator dates – refer to MOD-032 Scenarios – TEPPC case – no pre-run build, just review – 2021 Light Spring – 2020 Heavy Winter – S -> N flows 3 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

4. 2017 Data Preparation Manual Substations Turbine Type Bypass Breakers Multi-section lines RAS data submittal Approval Item: 2017 Data Preparation Manual Additional discussion points after decision 4 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

5. DPM: Substations Benefits: – Aggregating buses to Substations is needed in GIC studies – Provides a correlation object between WSM and planning model – A useful step towards node-breaker model Costs: – Need to populate the data but GIC data request will substantially complete the effort – Users will need to become competent in the concept of modeling substations 5 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

6. DPM: Turbine Type Benefit: – Attempting to match EIA Form 890 list Cost: – Steady state data in PSLF format won’t contain specific wind turbine type 6 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

7. DPM: Bypass Breakers Benefit: – Existing concern with conversion between software 28 of 178 series devices are modeled as bypassed in PSLF but not in PSSE – A useful step towards node-breaker model – Align with WSM Cost: – Changing existing data 7 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

8. Bypass Breaker Example 8 W ESTERN E LECTRICITY C OORDINATING C OUNCIL Not Bypassed Explicit Bypass Implicit Bypassed

9. DPM: Multi-section Lines Benefit: – Reduce conversion issues between software – Unnecessary to model conductor changes – Align with desire for explicit model of bypass breakers Cost: – Changing existing data 9 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

10. Multi-section Line Example 10 W ESTERN E LECTRICITY C OORDINATING C OUNCIL Merging two line sections

11. Number of Multi-section Lines Area NumArea Name# of MS Lines 40NORTHWEST66 14ARIZONA49 30PG AND E43 10NEW MEXICO31 26LADWP23 60IDAHO18 24SOCALIF14 65PACE7 22SANDIEGO6 50B.C.HYDRO2 20MEXICO-CFE1 54ALBERTA0 52FORTISBC0 21IMPERIALCA0 73WAPA R.M.0 70PSCOLORADO0 64SIERRA0 63WAPA U.M.0 62MONTANA0 18NEVADA0 11EL PASO0 Owner NumberOwner Name# of MS Lines 390Pacific Gas and Electric88 14Bonneville Power Admin81 79Tucson Electric Power74 129PN2 New Mexico55 81City of Los Angeles48 11Idaho Power Company41 74Southern California Edison29 2Arizona Public Service26 4WAPA-DSW19 26WAPA L.M.18 13PacifiCorp - West17 30Puget Sound Energy13 80Salt River Project12 15Seattle City Light12 7PacifiCorp - East11 32Portland General Elec11 50US Bur Reclam - N Pac Regn9 136SDG&E8 130PN1 New Mexico8 364California-Oregon Trans. Project7 740NON SCE Owned - SCE Area6 16Imperial Irrigation District4 420Orcas Power & Light Company4 127TSGT New Mexico3 34Snohomish PUD3 …….… A couple more with less than 3 11 W ESTERN E LECTRICITY C OORDINATING C OUNCIL 240 multi-section lines 572 sections of multi-section lines 137 series caps as part of multi-section line

12. RAS Data Submittal 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 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 12 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

13. More DPM Discussion DPM document categorization? Modeling Balancing Area – See change request from WECC staff – Approval Item: DPM Change Request for modeling Balancing Areas Modeling projects with no Planning Coordinator – See change request from Southwest Power Group – Approval Item: DPM Change Request for modeling projects with no Planning Coordinator 13 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

14. SRWG Vice Chair Encourage consideration of volunteering 14 W ESTERN E LECTRICITY C OORDINATING C OUNCIL