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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.


Questions feedback
Questions??Feedback??


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