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Advancing Transmission Planning: The Integrated Transmission Plan (ITP) Overview

The Integrated Transmission Plan (ITP) developed by SPP aims to address aging infrastructure and the increasing demand for reliable transmission in a dynamic market environment. Focusing on both regional and local needs, the ITP balances long-term investments and operational efficiencies while enhancing interconnections across the east and west regions. This proactive planning incorporates a 20-Year modeling approach to foster sustainable energy solutions, addressing issues like renewable mandates and demand response. By integrating various cost allocation methods, the ITP provides a comprehensive strategy for future energy demands.

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Advancing Transmission Planning: The Integrated Transmission Plan (ITP) Overview

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  1. Integrated Transmission Plan (ITP) Katherine Prewitt November 12, 2010

  2. Why did SPP develop the Integrated Transmission Planning Process (ITP)? • Aging infrastructure • Growing need for transmission • Market • Seams • Dynamic policy climate • Demand response • Renewable mandates • Smart grid

  3. Integrated Transmission Plan (ITP) • Balance • long-term investment • congestion costs • Forward looking and proactive • Create efficiencies in other processes • Generator Interconnection • Transmission Service Request • Integrate west to east

  4. ITP Principles • Focusing on regional needs • Also consider local needs • Planning the backbone transmission system • Serving SPP load by SPP resources in cost-effective manner • Backbone enhances interconnections • west & east regions • Strengthen ties to Eastern Interconnection and beyond

  5. ITP Principles • Incorporate a 20-Year physical modeling & 40-Year financial analysis • Proactively prepare & respond to national priorities • Provides flexibility to adjust expansion plans • Simplify multiple cost allocation methods • Develop holistic, long-range view • Authorization to Plan (ATP)

  6. ITP Goals • Goal: Design transmission backbone to connect load to the most reasonable generation alternatives • Improve connections between SPP’s east and west regions • Horizons: 20, 10, and 4 year • Focus: Regional, integrated with local • Resulting in: Comprehensive list of needed projects for SPP region over next 20 years • Underlying Value: Reliability and economics are inseparable

  7. SPP Renewable Resources SPP Load

  8. Assumptions for model runs: • Energy Efficiency • Fuel Prices • Environmental & Governmental Regulations • Generation Retirements • Market Structures • Wind Profiles • Renewable Electricity Standards • Load Growth • Demand Response

  9. Triennial 20-Year Assessment • 345+ kV solutions • Also monitor underlying system (100 kV+) • Encompass scenarios: • Renewable energy penetration • Load growth • Fuel prices • Others • Flexible to evolve with changing landscape

  10. ITP20 expectations • Robust EHV expansion plan for the SPP region • Identified through analysis of multiple futures • What it is • Long-term, robust EHV expansion plan • Value-based, cost-effective solution • Considers both economics and reliability • One piece of the ITP pie

  11. Triennial 10-Year Assessment • 100+ kV solutions • Also monitor underlying system (69 kV+) • Narrower focus • Collector and delivery grid facilities • Mitigation of congestion • Improved market access • EHV overlay staging and interconnection

  12. Annual Near-Term Assessment • 69+ kV solutions • Local planning needs • Look at known assumptions • Adherence to reliability standards

  13. Robustness Metrics • Improvements in Reliability • Enable Efficient Location of New Generation Capacity • Reduced Losses • Increased Effective Capacity Factor • Ability to Reduce Cost of Capacity • Positive Impact of Losses Capacity • Levelization of LMPs • Improved Competition in SPP Markets • Change in the Installed Capacity Reserve Margin • TLR Reduction – Enabling Market Solutions

  14. Robustness Metrics • Limited Export/Import Improvements • Improved Market Dynamics • Reduction of Market Price Volatility • Reduction of Emissions Rates and Values • Transmission Corridor Utilization • Ability to Reduce Cycling of Base Load Units • Generation Resource Diversity • Ability to Serve New Load • Part of Overall EHV Overlay Plan

  15. Conclusion • Foster new era of transmission planning • Forward-looking and proactive planning • GI and Aggregate Study more efficient • Meet short-term and long-term needs • Robust, flexible, and cost-effective • Maintain reliability while providing long term economic solutions

  16. Katherine PrewittDirector, Planning501-614-3518kprewitt@spp.org

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