1. Reliability Planning Priorities for 2015 Byron Woertz, Senior Project Manager W ESTERN E LECTRICITY C OORDINATING C OUNCIL

2. Overview Background 2015 as a transition year Current workload assessment Priority work for 2015 Proposed timeline Next steps 2 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

3. Background Public Data Base Inter- connection- Wide Planning Process Inter- connection- wide Transmission Report Technical and Economic Analyses 3 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

4. 2015 Is A Transition Year 2015 No Comprehensive Transmission Plan Multiple Common Case Updates Round Trip Analysis Changes to Two-Year Planning Cycle EPA Rule 111(d) Work Integration of IRAM RPGs’ FERC Order 1000 Implementation 4 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

5. Current Workload Assessment Interconnection-wide report 43 2014 10-year study cases 18 2014 20-year study cases 44 2015 10-year study cases 3 20-year 2015 study cases CPP analyses 8 TEPPC Committees, subcommittees and work groups 7 planning regions Multiple 2024 Common Case Updates 2034 Reference Case Round Trip Analysis 2026 Common Case 2036 Reference Case Public Data Base Inter- connection- Wide Planning Process Inter- connection- wide Transmission Report Technical and Economic Analyses 5 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

6. Proposed Plan for 2015 ValueResources Priorities Schedule 6 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

7. Prioritization Drivers—TEPPC Protocol Portion of the Interconnection to be studied Fundamental design issues of interest to multiple parties? National, state or regional policy issues Ability to be consolidated/combined with other studies Information valuable to broad stakeholders? Can multiple requests be represented generically? Can requests be aggregated into energy or load zones with generic transmission in between? Can analysis be completed with PCM or does it require other tools (PFM, stability analysis)? Is study necessary to meet member Transmission Provider’s compliance with OATT? 7 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

8. Prioritization Drivers—Summary West-Wide ImpactStakeholder ValueWork In ProgressSupport Other WorkSupport for IRAM 8 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

9. Proposed Priorities 2024 Common Case 2034 Reference Case 2014 10-Year Cases 2014 20-Year Cases Power Flow Model Studies Issue-Based Analyses Inter- connection- Wide Report 9 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

10. Proposed Priorities 2034 Reference Case 2024 Common Case 2014 10-Year Cases 2014 20-Year Cases Power Flow Model Studies Issue-Based Analyses Inter- connection- Wide Report 10 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

11. Proposed Priorities 2014 10-Year Cases (19) 2024 Common Case 2034 Reference Case 2014 20-Year Cases Power Flow Model Studies Issue-Based Analyses Inter- connection- Wide Report 11 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

12. Proposed Priorities 2014 20-Year Cases (8) 2024 Common Case 2034 Reference Case 2014 10-Year Cases Power Flow Model Studies Issue-Based Analyses Inter- connection- Wide Report 12 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

13. Proposed Priorities Power Flow Model Cases (4) 2024 Common Case 2034 Reference Case 2014 10-Year Cases 2014 20-Year Cases Power Flow Model Studies Issue-Based Analyses 13 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

14. Proposed Priorities Issue-Based Analyses (5) 2024 Common Case 2034 Reference Case 2014 10-Year Cases Power Flow Model Cases (4) 2014 20-Year Cases Inter- connection- Wide Report 14 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

15. Proposed Priorities Inter- connection- Wide Report 2024 Common Case 2034 Reference Case 2014 10-Year Cases Power Flow Model Cases (4) 2014 20-Year Cases Issue-Based Analyses 15 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

16. 2014 vs. 2015 Study Program Recommended priorities focus on 2014 Study Program 2015 Study Program: – 2026 Common Case and 2036 Reference Case – Increased/decreased major drivers (load, hydro, natural gas price, CO 2 price) – Coal retirement – High renewables – Offshore wind/wave/tidal – Added transmission Many similarities between 2015 and 2014 (not identical) 16 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

17. Work That Would Not Be Completed in 2015 Lower-priority 10-year study cases from the 2014 TEPPC Study Program; Lower-priority 20-year study cases from the 2014 TEPPC Study Program; 2036 Reference Case; and 10-year and 20-year study cases included in the 2015 TEPPC Study Program. 17 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

18. Proposed Timeline 18 W ESTERN E LECTRICITY C OORDINATING C OUNCIL Second Quarter (May-Jun) Continue updates of 2024 Common Case (1-2) Publish 2034 Reference Case Continue work on priority 10- year and 20-year study cases Continue work on round trip analysis Publish final report on Planning for Uncertainty Third Quarter (Jul-Sep) Continue updates of 2024 Common Case (1-2) Complete priority 10-year and 20-year study cases Publish final report on flexibility analysis Complete analysis of CPP test case Complete energy-water-climate change scenario system impact analysis and preliminary reliability risk assessment Complete round trip analysis Fourth Quarter (Oct-Dec) Create and vet with stakeholders Interconnection-wide Reliability Planning report Create 2026 Common Case Develop plan for creating 2016 work plan and study program Begin revision of TEPPC Planning Protocol

19. Discussion Question Does this proposed prioritization meet the goals of: Maximizing value Prioritizing work Using resources efficiently Providing timely results 19 W ESTERN E LECTRICITY C OORDINATING C OUNCIL

20. Next Steps May 22 Comments on proposed priorities June 4 Decision at TEPPC Coordinating Call September 30 Complete analytical work December 31 Complete annual report and planning for 2016 20 W ESTERN E LECTRICITY C OORDINATING C OUNCIL