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Excelsior Energy’s Mesaba Energy Project

Excelsior Energy’s Mesaba Energy Project. Update for the NM-SPG August 16, 2006. Current Project Parameters. Two 606MW IGCC units ISDs 2011 and 2013 Primary Site- West Range POI---Blackberry 230kV Sub Near Taconite, MN in Itasca County Alternate Site- East Range

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Excelsior Energy’s Mesaba Energy Project

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  1. Excelsior Energy’sMesaba Energy Project Update for the NM-SPG August 16, 2006

  2. Current Project Parameters • Two 606MW IGCC units • ISDs 2011 and 2013 • Primary Site- West Range • POI---Blackberry 230kV Sub • Near Taconite, MN in Itasca County • Alternate Site- East Range • POI---Forbes 230kV Sub • Near Hoyt Lake, MN in St. Louis County • Designated as an Innovative Energy Project under special MN Legislation

  3. MISO LGIP Current Status

  4. Transmission Progress to Date • Transmission Concept Screening Study July 2003 • East Range GO Analysis August 2004 • East Range GI Request to MISO October 2004 • Queue # 38280-01, Project G477 • First Unit 531/552MW ISD 2010 • Network Resource Service • G477 Feasibility Study Report March 2005 • 6 months • West Range GO Analysis May 2005 • West Range GI Request May 2005 • Queue # 38491-01, Project G519 • First Unit 600MW ISD 2010 • Network Resource Service

  5. Transmission Progress to Date • G519 ‘Out of Queue’ Study Agreement August 2005 • West & East Range Preliminary GO Facilities Engineering Designs December 2005 • West & East Range GO Analyses Updates December 2005 • G519 Feasibility Study Results December 2005 • 8 months • G477 & 519 System Impact Study Results April 2006 • 11 and 19 months • G477 & 519 restudy of short circuit results July 2006 • Second unit GI request submitted January 2006 • Designated G597

  6. Transmission Progress to Date • G597 Feasibility Study Report July 2006 • G477&519 Facilities Studies underway July 2006 • MP has contracted to perform • G597 SIS Agreement Executed August 2006 Note: Between July 2004 and December 2005 Excelsior performed six series of powerflow studies to evaluate GO facilities and network reinforcements

  7. MISO Study Results • Project G477 SIS (Forbes POI) • Powerflow : No problems identified • Short Circuit : Several pre-existing over-dutied breakers but no new ones caused by G477 • Stability : All simulations are stable and within damping criteria. No transient low voltage violations. • Deliverability Analysis: Failed • Awaiting MISO study proposal to continue NRIS process • TSR submitted by Xcel for NITS (local capacity resource)

  8. MISO Study Results • Project G519 SIS (Blackberry POI) • Powerflow : Some issues identified during contingencies. Resolved with the addition of a new Boswell-Riverton 230kV line. • Short Circuit : Several pre-existing over-dutied breakers delete [plus four new 115kV breakers at Nashwauk Sub due to G519] • Stability : All simulations are stable and within damping criteria. No transient low voltage violations. • New Boswell-Riverton 230kV line was included in these studies. • Deliverability Analysis: Failed • Awaiting MISO study proposal to continue NRIS process • TSR submitted by Xcel for NITS (local capacity resource

  9. MISO Study Results • Project G597 Feasibilty Study (Blackberry POI) • Powerflow: numerous local contingency violations identified • Not unexpected with both MEP II and new 800MW NE MN unit included without any network upgrades • Short Circuit: four Nashwauk 115kV breakers overdutied Note: Modeling didn’t include proposed Minnesota Steel Plant or CAPX 2020 Projects

  10. Other Mesaba Energy Project Progress • Filing made 12/23/05 with MPUC for a PPA with Xcel Energy • under Innovative Energy Project Legislation • Joint Siting/Routing Application made 6/16/06 for both units, all GO facilities, and gas pipeline. • Application accepted as complete 7/6/06.

  11. Proposed GO Facilities • G519: 9 mile double circuit 345kV steel pole structures, operated 230kV for MEP I • G477: Two 345/115kV steel pole lines replacing existing 115kV structures for most of their 34 and 37 mile routings, with 345kV side operated 230kV for MEP I

  12. West Range GO Facilities

  13. West Range GO Routings

  14. East Range GO Facilities

  15. East Range GO Routings

  16. Questions??

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