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Excelsior Energy’s Mesaba Energy Project. Update for the NM-SPG May 5, 2005. MISO Generator Interconnection Requested mid-Oct 2004. PROJECT G477 Queue Number 38280-01 For first unit of 530/550MW in Spring 2010

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excelsior energy s mesaba energy project

Excelsior Energy’sMesaba Energy Project

Update for the NM-SPG

May 5, 2005

miso generator interconnection requested mid oct 2004
MISO Generator Interconnection Requested mid-Oct 2004
  • PROJECT G477
  • Queue Number 38280-01
    • For first unit of 530/550MW in Spring 2010
    • Project location is Cliffs-Erie property (old LTV mining site) north of Hoyt Lakes, MN
    • POI is proposed as Forbes 230KV bus
    • For network resource service
phase i miso feasibility study completed mid march 2005
Phase IMISO Feasibility Study Completed mid-March 2005
  • Preliminary screening study of the generator interconnection to the existingsystem
    • Includes powerflow, transfer capability, and short circuit analysis but no stability analysis
  • 2009 summer peak powerflow model including:
    • A-W Project
    • Proposed area generators higher in the MISO queue
    • Mesaba Unit 1
    • Forbes 230kV POI
    • 345kV outlet line and 345/230kV autotransformer at Forbes
  • Study Participants: ATC, GRE, MH, MP, OTP, Xcel
miso feasibility study results
MISO Feasibility Study Results
  • No fatal flaws or insurmountable problems with interconnection to Forbes 230kV bus
  • Some transfer capability exists
    • could be as lower as 90MW
    • or over 300MW
  • Six Forbes 115kV breakers over-duty
miso feasibility study modeling issues
MISO Feasibility StudyModeling Issues
  • How higher queued generators are represented
    • i.e. generator upgrades- transmission system changes to mitigate adverse impacts
  • Manitoba Hydro system high voltage in base case
  • How power delivery was sinked into Xcel control area
  • A number of existing underlying system facilities (115-230kV) are near or over their ratings in the base case
    • Need to be evaluated and resolved whether MEP proceeds or not
phase ii miso system impact study sis
Phase IIMISO System Impact Study (SIS)
  • Rigorous powerflow, short circuit and stability analysis
  • Studied for both peak and off-peak load under a variety of severely stressed conditions
  • Consistent with applicable Reliability Standards
  • Includes new Deliverability Analysis
phase ii miso system impact study sis1
Phase IIMISO System Impact Study (SIS)
  • Kick off meeting set for May 11 at MISO St. Paul Offices
  • Same study participants
  • PTI continuing as MISO contractor
phase ii miso system impact study sis2
Phase IIMISO System Impact Study (SIS)
  • Excelsior’s desired outcome----
    • that the study process continues beyond just the identification of potential problem areas caused by the project interconnection and/or operation at full output
    • to the development of a robust regional solution(s) so that the likely purchasers of long term power from the project (load serving entities in MN) can designate the project as a new network resource and
    • have some confidence that sufficient facilities will be put in place to minimize the potential for unit output being constrained.