Transcript mcgp-ex-excelsior-sh..

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
– 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
• Preliminary screening study of the generator
interconnection to the existing system
– Includes powerflow, transfer capability, and short circuit analysis
but no stability analysis
• 2009 summer peak powerflow model including:
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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
• 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
• 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)
• 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 (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 (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??