SPP Public Information Update on CPP Transition Study and CNAT Priorities

"Working towards sustainable energy solutions, the Southwest Power Pool provides insights on upcoming CNAT topics, key areas for CPP transition study, and CNAT priorities. The focus is on balancing reliability and economics in future energy planning cycles."

• SPP
• Energy Transition
• Southwest Power Pool
• CNAT Priorities
• Future Planning

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1. CPPTF CNAT CHRIS JAMIESON FEBRUARY 8, 2024 Working together to responsibly and economically keep the lights on today and in the future. SPPorg southwest-power-pool SouthwestPowerPool

2. Agenda Current and upcoming CNAT Topics In Progress Identify key areas of focus for CPP transition study In Progress leading into Annual Assessments Determine changes to CNAT meeting format In Progress 2 SPP Public Information

3. CURRENT AND UPCOMING CNAT TOPICS 3

4. UPCOMING CNAT MEETING TOPICS (IN PROGRESS) Date (CT) Topic Thursday Feb 8, 2:00-3:00 PM Top CNAT Priorities/Hot Topics Thursday Feb 15, 2:00-3:00 PM TBD ... 4 SPP Public Information

5. TOP CNAT PRIORITIES/HOT TOPICS CRIS Plan A CPP Transition Scope Sub-regional Siting Totals by resource type by year by future with TWG/ESWG/GIAG input and scope approval for annual assessment cycle Current DISIS to Initial Reliability Assessment/ ERIS/CRIS Threshold Study #2 type analysis Aligning scope and schedule lessons learned for 2025 ITP, 2022 20-Year, DISIS, FERN Study & TPL TWG Backlog Mitigation Improvements leading into CPP ITP/TPL/DISIS Milestone Correlation and Alignment Balance economics and reliability in Initial Reliability, Consolidated Assessments, and Final Reliability Assessments Milestone scope and schedule additions/modifications/deletions Ensure workable CPP Transition and Annual Assessment Scope and Schedule (TPITF Lessons Learned) 5 SPP Public Information

6. IDENTIFY KEY AREAS OF FOCUS FOR CPP TRANSITION STUDY 6

7. Planning for a full cycle of holistic futures and scenario development CPP MULTIPLE CYCLE Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 0 Future/Scenario Study 1: Long-term (10 YR + 20YR) Study 2: 10 YR Production Cycle X Study 3: 10 YR Development Future/Scenario Study 1: Long-term (10 YR + 20YR) Study 2: 10 YR Production Cycle Y Study 3: 10 YR Future/Scenario Development Study 1: Long-term (10 YR + 20YR) Production Study 2: 10 YR Cycle Z Study 3 Future/Scenario Development 7 SPP Public Information

8. GI BACKLOG & CPP TRANSITION STUDY A* 2026 ITP MOPC Approval Study 1 MOPC Approval 2024 2025 2026 2027 Study 1 SPP Board Approval 2026 ITP SPP Board Approval BCP GI Backlog Mitigation completion (thru DISIS-2023) GI Backlog & Postings Normal GI Process DISIS-2024 2026 ITP Assessment Assessment Scope Development Future/Scenario 2026 ITP Models Development (PF, SC, MEM) Needs Assessment & DPP Window Solutions Evaluation & Portfolio Development Study Finalization, Final Assessments & Report - Summary CPP STUDY 1 (2027 20 YR Assessment) (Optimized schedules with 2026 ITP)** CPP Transition Development Scope Development - Future/Scenario Base Model Development Study 1 Models CPP Model Development (MEM, Dynamic, SC, MPM) Regional Assessment Needs Assessment & DPP Window Evaluating to see if can finish earlier CPP Solutions Evaluation & Portfolio Development Study Finalization, Final Assessments & Report * Dates subject to change ** Evaluate the possibility of completing the CPP transition study ahead of the current 20 YR tariff requirement as part of scoping Note: The first CPP start date will be finalized as part of the CPP transition study scope, GI backlog progress, and timing of DISIS-2025 8 SPP Public Information

9. CPP transition study helps set the priority of milestones TRANSMISSION PLANNING IMPROVEMENT TASK FORCE STRUCTURE AND RECOMMENDATIONS Issues List Ranking and Prioritization Topics Purpose Current State Current State Issues with Current State Issues with Current State Desired State Desired State Recommendation Transition and Implementation Recommendations Implement annual ITP planning cycle Standardized study scope Establish common reliability planning model for all SPP planning assessments Utilize a holistic approach to planning Create a Staff/Stakeholder accountability program 9 SPP Public Information

10. SPPS PLANNING CHALLENGES (SCRIPT) Unwieldy GI queue volumes Excess energy and lack of transfer capability or incentives Divisiveness about planning assumptions, results and funding Lack of certainty about future transmission investment decisions Parallel studies that use different cost allocation Concerns about inequitable cost allocation 10 SPP Public Information

11. SPP PLANNING ASSESSMENT RELATIONSHIPS Affected System Generation Interconnection ITP Reliability Analysis ITP Economic Analysis TPL Reliability Analysis Other Planning Processes Generation Interconnection MTEP (CSP) Economic Analysis Operations Model Build, Gen and Load Review Model Build, Gen and Load Review Model Build, Gen and Load Review Model Build, Gen and Load Review Model Build, Gen and Load Review Annual Flowgate Review Model Build, Gen and Load Review Integrated Market Place Steady State Futures, Siting and GOFs Futures, Siting and GOFs Steady State Steady State Base Reliability Real Time Contingency Analysis Transmission Service Market Powerflow Model Short Circuit Short Circuit Dynamic Constraint Assessment Constraint Assessment Persistent Operational Needs Attachment AQ Short Circuit Market Economic Model Market Economic Model Dynamic Dynamic Short Circuit Loss of Load Expectation Congestion Hedging Economic Needs Economic Needs Voltage Stability Transfer Analysis EMT EMT 11 SPP Public Information

12. Consolidated Assessment aka ITP/TPL/DISIS Analysis Standardized Scope aka ITP/TPL/DISIS Scope C1.1.5 Initial Reliability assessment aka ITP/TPL/DISIS Analysis C1.1.A Software Tools C1.1.1 CPP Futures** C1.1.4 Stakeholder Request Submittal C1.1.6 Consolidated Assessment Readiness Criteria** C1.1.7 Reliability model development** C1.1.8 Resource expansion and siting** C1.1.9 Economic modeling** C1.1.10 CPP Needs assessment** C1.1.11 CPP solution evaluation C1.1.13 Cost Allocation C1.1.14 Final Assessments C2.1 Model data collection and review C2.2 Engineering Engine C3 Common Base Model Set** CS1 - Upgrades that meet multiple needs CS2 - Upgrades that require joint funding O4 - ATC Calculation and Use** O1 Holistic needs and solutions assessment** O5 - Non-transmission expansion solutions** O6 - SPP and MISO** S2.4 NEDTF deliverability recommendation DQ2 - Modeling data DQ3 - Cost estimation process DQ5 - Solution development and submissions DQ6 - Sensitivity analysis and benefit metrics S2.4 NEDTF deliverability recommendation C1.1.A Software Tools C1.1.1 CPP Futures** C1.1.4 Stakeholder Request Submittal C1.1.8 Resource expansion and siting**** DQ1 - Consolidated planning process & schedule DQ2 - Modeling data DQ4 - ITP futures S1 - GI backlog mitigation** S2.1 Pre-screening tools and requirements S2.2 GI readiness criteria** S2.3 GI decision point criteria C1.1.E Subregions* C1.1.A Software Tools C1.1.4 Stakeholder Request Submittal C1.1.6 Consolidated Assessment Readiness Criteria** C1.1.7 Reliability model development** C1.1.8 Resource expansion and siting** C1.1.9 Economic modeling** C1.1.10 CPP Needs assessment** C1.1.11 CPP solution evaluation C1.1.13 Cost Allocation C2.1 Model data collection and review C2.2 Engineering Engine C3 Common Base Model Set** CS1 - Upgrades that meet multiple needs CS2 - Upgrades that require joint funding DQ1 - Consolidated planning process & schedule DQ2 - Modeling data DQ3 - Cost estimation process DQ5 - Solution development and submissions DQ6 - Sensitivity analysis and benefit metrics O1 Holistic needs and solutions assessment** O4 - ATC Calculation and Use** O5 - Non-transmission expansion solutions** O6 - SPP and MISO** S2.4 NEDTF deliverability recommendation 12 SPP Public Information

13. GI BACKLOG & CPP TRANSITION STUDY A* 2024 2026 ITP MOPC Approval Study 1 MOPC Approval 2025 2026 2027 Study 1 SPP Board Approval 2026 ITP SPP Board Approval BCP GI Backlog Mitigation completion (thru DISIS-2023) GI Backlog & Postings Normal GI Process DISIS-2024 2026 ITP Assessment Assessment Scope Development Future/Scenario 2026 ITP Models Development (PF, SC, MEM) Needs Assessment & DPP Window Solutions Evaluation & Portfolio Development Study Finalization, Final Assessments & Report - Summary CPP STUDY 1 (2027 20 YR Assessment) (Optimized schedules with 2026 ITP)** CPP Transition Development Scope Development - Future/Scenario CPP Annual Assessments Base Model Development Study 1 Models CPP Model Development (MEM, Dynamic, SC, MPM) Regional Assessment Needs Assessment & DPP Window Evaluating to see if can finish earlier CPP Solutions Evaluation & Portfolio Development Study Finalization, Final Assessments & Report * Dates subject to change ** Evaluate the possibility of completing the CPP transition study ahead of the current 20 YR tariff requirement as part of scoping Note: The first CPP start date will be finalized as part of the CPP transition study scope, GI backlog progress, and timing of DISIS-2025 13 SPP Public Information

14. APPENDIX 14

15. SWOT analysis to help create list of key areas of focus for CPP transition study improvement efforts SWOT ANALYSIS OVERVIEW Strengths Weaknesses Strong capabilities and advantages Factors hindering performance to CPP S W Opportunities Threats O T Factors that can be improved upon Factors posing risks to the success of CPP 15 SPP Public Information