1. System Review Work Group Update John Gross, SRWG Chair Presented to TSS Jan. 22, 2016 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

2. Topics Study Program Subgroup – 2017 Basecase Compilation Schedule – Purpose of Basecases Compliance Subgroup – Data Preparation Manual – Replog and Case Checks General Items – Software File Format Comparison – Data Maintainer – Network Model Management – Short Circuit Data – WSM and Planning Model – RAS Modeling Annual Study Program Report 2 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

3. Study Program: 2017 Basecase Compilation Schedule Consider annual survey responses Consider moving 10 year summer case up Discuss combining heavy and light case timelines Remove Area Coordinator Example 2016 Schedule: LinkLink 3 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

4. Study Program: Purpose of Basecases Drafting team to discuss 4 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

5. Compliance: Data Preparation Manual Not up for approval! Develop process for implementing changes – Purpose of change/request for data – How data will be gathered and maintained Potential changes coming: – Explicitly model bypass elements – Disallow “multi-section lines” – Require bus type field – Minimize multiple SVD on bus… – Substations – Balancing Authority Area Remove Area Coordinator 5 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

6. Compliance: Data Checking Replog – Removed Standard references – New fields dominate counts – Improvement in every field Case Checks 6 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

7. Presented to SRWG Software File Format Comparison – https://www.wecc.biz/Reliability/PowerWorld%20Dat a%20Structure%20Differences.pdf https://www.wecc.biz/Reliability/PowerWorld%20Dat a%20Structure%20Differences.pdf PowerWorld Data Maintainer – https://www.wecc.biz/Reliability/PowerWorld%20Dat a%20Maintainer.pdf https://www.wecc.biz/Reliability/PowerWorld%20Dat a%20Maintainer.pdf Network Model Management – https://www.wecc.biz/Reliability/2015-11-04%20- %20EPRI%20Network%20Model%20Management%20 for%20WECC%20SRWG.pdf https://www.wecc.biz/Reliability/2015-11-04%20- %20EPRI%20Network%20Model%20Management%20 for%20WECC%20SRWG.pdf 7 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

8. Short Circuit Data PCC proposed collecting short circuit data – Align with MOD-032 requirements – System impacts across “areas” – Collect in agnostic form – Utilize steady state and dynamic data process https://www.wecc.biz/Administrative/WECC% 20Wide%20Short%20Circuit%20data.pdf https://www.wecc.biz/Administrative/WECC% 20Wide%20Short%20Circuit%20data.pdf SRWG feedback? – no one is interested 8 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

9. WSM and Planning Model Mapping generators in both models was helpful Next steps to be considered: – Map transformers – Map transmission lines – Represent Balancing Authority Areas 9 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

10. RAS Modeling Encourage experienced study engineers to use the WECC RAS Format – If you don’t use it, the data will be worthless – Test software implementation Higher data security – TSS should request WECC for necessary web accessible security to data – All data should be saved in one location 10 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

11. Annual Study Program Report SRWG Approved Guidance on next year? 11 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

12. All Done 12 W ESTERN E LECTRICITY C OORDINATING C OUNCIL