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Colorado Long Range Transmission Planning Group 2008 Study Progress

Colorado Long Range Transmission Planning Group 2008 Study Progress. CCPG Meeting March 25, 2008. Presented by Mark Graham. 2008 CLRTPG Process Summary. Background CLRTPG Initial Study Method Progress Changes to Initial Study Method Progress on Study Work Next steps.

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Colorado Long Range Transmission Planning Group 2008 Study Progress

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  1. Colorado Long Range Transmission Planning Group2008 Study Progress CCPG Meeting March 25, 2008 Presented by Mark Graham

  2. 2008 CLRTPG Process Summary • Background • CLRTPG • Initial Study Method • Progress • Changes to Initial Study Method • Progress on Study Work • Next steps

  3. Background: CLRTPG • Colorado Long Range Transmission Planning Group • Sub-Group of CCPG • Formed to Analyze Transmission Needs for Colorado and Eastern Wyoming in the 10-Year Time Frame

  4. CLRTPG Participants • Load Serving Entities (LSE) • Aquila Networks • Colorado Springs Utilities • Platte River Power Authority • Public Service Company of Colorado (Xcel Energy) • Tri-State Generation and Transmission • Western Area Power Administration • Stakeholders • Input obtained from all Interested Parties

  5. CLRTPG Participants Morey Wolfson – Colorado Governor’s Energy Office Mike Mendelson – Western Resource Advocates Eric John - SkyFuel Ron Lehr – American Wind Energy Association TJ Deora - Horizon Wind Jerry Vaninetti, Bill Pascoe - Trans-Elect Inez Dominguez, Jeff Hein - Colorado Public Utilities Commission Gerry Stellern, Tom Green, Joe Taylor, Shane Gutierrez - Xcel Energy Chuck Sisk – Colorado Springs Utilities Mark Graham, David Gustad, Andy Leoni – Tri-State G&T Dan Lyons – Aquila Networks Billy Cutsor – Municipal Energy Agency of Nebraska Wes Wingen, Eric Egge – Black Hills Power Shawn Carlson, Matt Stoltz – Basin Electric Bob Easton, Jared Griffiths – Western Area Power Administration John Collins – Platte River Power Authority

  6. Initial Study Methodology • Case Development • 2013 (5-year Case) and 2018 (10-year Case) • Definition of Scenarios • Including Alternative Resource Locations and Associated Transmission • All Participants Contributed • Contingency Analysis Study Process • Report

  7. Changes • 2013 Case Work Moved to Xcel’s SB-100 Process • then changed to a 2015 analysis • Weekly Meetings To Aid Case Development and Scenario Definition • Now developing procedures for Stakeholder Participation in Study Work

  8. Study Progress • Nearing 2018 Case Readiness • Using 2018 WECC Review Case • Case Released 3/14/08 • Scenario Definitions Finalized • Four Scenarios • Subject to Adjustments as Scenarios are Analyzed

  9. Scenarios Developed • Transmission system to accommodate Colorado and Wyoming utility loads and resource plans. • with minimum Colorado RPS. • Significant Wyoming generating resources • Use the proposed Wyoming-Colorado Intertie • Up To 5% of the capacity in Colorado Wind GDAs. • Includes 2000 MW Solar Power from Colorado’s South-Central GDAs.

  10. Scenario A 2018 MW PSCo Wind 1400 PSCo Solar 425 PSCo Geothermal 20 PSCo Arapahoe CC 480 PSCo CTs 130 PSCo CC 470 PSCo IGCC 150 Aquila Wind 103 Aquila Solar 2 Tri-State Wind 167 Tri-State Other 36 PRPA Wind 65 CO Springs Wind 97 MEA Nebraska Wind 29 Additional 2008-2018 Capacity 3574

  11. Scenario A with High Renewable Injections 55 MW 910 MW 750 MW Baseload 715 MW Solar 87 MW 770 MW

  12. Scenario B 910 MW Wind Inject significant Wyoming generating Resources into the proposed Wyoming-Colorado Intertie Project. Move Pawnee injections of Scenario A into Wyoming Wyoming-Colorado Intertie Project

  13. Scenario C Inject Up To 5% of Wind GDA capacity

  14. Scenario D Inject 1,000 MW from the San Luis Valley GDA and 1,000 MW from the GDA south of Pueblo.

  15. Which Scenario will satisfy the CCPG Joint-Study Requirement? • Utility L & R with High/Low RPS Wind • Significant Wyoming resources • Up to 5% of Wind GDA capacity. • 2000 MW Solar Power Scenario

  16. Balanced Dispatch High Low Zero

  17. Balanced Dispatch Low Load High Low Zero

  18. Next Steps • 2018 Case Studies • Utility engineers fix underlying issues • Low Wind / Peak Summer Load • Powerflow with Scenario A- Low Renewable • Develop infrastructure requirements • High Wind / Off-Peak Spring Load • Develop re-dispatch • Powerflow and Stability

  19. CLRTPG Study Criteria • N-1 outages • Voltage criteria as specified by utility • Overload criteria by utility • New generation must not degrade system peformance • In case of violation: • Reactive devices to correct voltage • Lowest cost long-range alternatives

  20. Data Confidentiality • Confidential Transmission Information • Transmission Capability of non-posted paths • Available Transmission Capability • Modify meetings to address concerns

  21. Questions?Comments?

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