1 / 14

Buffalo Ridge Incremental Generation Outlet Study Presentation

This presentation outlines the study on increasing Buffalo Ridge area generation outlet capacity for wind development, including analysis, results, and recommendations for implementation.

lorand
Télécharger la présentation

Buffalo Ridge Incremental Generation Outlet Study Presentation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Buffalo Ridge Incremental Generation Outlet (BRIGO)Transmission Study Presentation to National Wind Coordinating Committee June 22, 2005 W Grivna, PE of Xcel Energy R Gonzalez, PE of Excel Engineering, Inc.

  2. Outline • Study Purpose/Goals • Background • Participants • Analysis • Results • Conclusions/Recommendations • Next Steps

  3. Study Purpose/Goals • Determine feasibility of increasing Buffalo Ridge area generation outlet… • by several hundred MW… • through “modest” (presumably 115 kV-class) improvements… • that could be relatively quickly implemented… • while plans for future long-range regional transmission projects continue their evolution.

  4. Background • Buffalo Ridge is the premier wind resource in MN/SD • Transmission improvements under way to increase outlet capacity to 825 MW • Further interest confirmed by MISO & WAPA interconn queues • Xcel Energy has had specific MW & Energy % mandates • All other Minnesota power suppliers now also have renewable energy obligations • Result: Intense interest in wind development on the Ridge

  5. Transmission map of Buffalo Ridge Area

  6. Study Participants • Sponsor: Xcel Energy • Technical & Economic Analyses performed by Xcel Energy

  7. Reviewers/technical support: (MAPP MB SPG) • Western Area Power Administration • Otter Tail Power • Missouri River Energy Services • MISO • Marshall Municipal Utilities • Great River Energy • East River Electric Power Cooperative • Alliant Energy • State regulators (MN/ND/SD) • Energy Policy Groups (Wind on the Wires) • IPPs

  8. Analysis • Powerflow: Concentrate on 2007, summer off-peak condition • System intact • First contingency (“n-1”) • Requirement: satisfy applicable voltage and loading criteria • Identify “existing system” (post-825 MW additions) outlet limits for Buffalo Ridge Mpls/St Paul deliveries • Formulate transmission options • Test Options’ performance • Electrical • Financial

  9. Cost versus Outlet for Options

  10. Complications • Reactive power requirements/Voltage Stability • Power and Energy losses • Load-serving considerations • Constructability • MISO-WAPA interface • North Dakota Export (NDEX) interface • Geographic extent of Ridge

  11. Results • All Options can achieve 300-500 MW of incremental outlet • Some Options require extensive additional improvements • Line reconductors & rebuilds • Transformer replacements • Shunt capacitor additions • Incremental energy losses are high (25 – 30%) • The “best” Options all include a second (independent) Fenton-Nobles Co 115 kV outlet path to the new 345 kV

  12. Conclusions/Recommendations • Implement “Option 31A” • 2nd Nobles Co 345/115 kV transformer • 2nd Nobles Co-Fenton 115 kV line • Lake Yankton-Marshall 115 kV line • Several shunt capacitor banks • Misc reconductors, equipment upgrades • Capable of providing 300 - 500 MW of incremental outlet (beyond 825 MW level) at reasonable cost • Provides some incidental load-serving benefits

  13. Map of Option 31A

  14. Next Steps • Coordinate & confirm compatibility with likely long-range plans & identified projects • CapX • Big Stone 2 • MISO NW Exploratory • Address adaptation to specific proposed wind gen projects • (Need “Yankee fix” if MWs on north Ridge exceed critical level) • Coordinate with MISO stability study results • Initiate permitting process

More Related