Regional Wind Transmission Issues

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Regional Wind Transmission Issues
November 9, 2009
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Overview

• Wind Integration / Penetration Issues are BIG in
  SPP
• 50 GW of wind farms in GI queue, Current queue
  36 GW with significantly more expected
• Eastern Wind Integration and Transmission Study
  (EWITS) projects 60-95 GW of wind development in
  SPP
• SPP supports many wind related initiatives
• JCSP08 / EWITS
• NERC IVGTF
• NWCC
• Nebraska Power Authority Wind Integration Study
• Focus today on two SPP internal studies

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Wind Integration Task Force

• The SPP WITF was developed by MOPC to determine
  the impact of integrating wind generation into
  the SPP transmission system and energy markets.

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Wind Integration Task Force Study

• In Process
• Focus on 10 and 20 wind penetration scenarios
  with necessary transmission
• Defer 40 scenarios
• Significant transmission expansion to manage wind
  injections at 10-20 penetration rates with
  approximately 2 curtailments
• Recommendations will provide key input into scope
  and need for Priority Projects
• Conclude analyses in December with
  recommendations to MOPC in January 2010

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SPS Wind Penetration Study

• Concern that Southwestern Public Service (SPS)
  system was likely at immediate reliability risk
• Many wind providers see SPS system a prime
  opportunity because of combination of high wind,
  load and existing network, despite limited
  interface capability.
• Many behind the meter distribution turbines not
  studied.
• Qualifying Facilities
• EIS Market
• AMEC contracted to assess expected operating
  conditions in upcoming spring seasons.

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Wind Data

• NREL/DOE 2004-2006 wind data for every 2 square
  kilometers every 10 minutes at 80 and 100m
  heights
• Diversity exists, but expected range is 0 to 100
  of nameplate capacity for wind farms within SPS
• Ramps are noteworthy
• Maximum 10 minute change ranges from 26 to -23
• Maximum hourly change ranges from 57 to -52
• Energy output in spring is impressive. Capacity
  factors of aggregate wind farms range from 49.0
  in 2004 to 58.2 in 2006

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Correlation Between Wind and Load
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Unit Commitment Load and Wind
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Value of Incremental Export Capability
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Next Steps

• SPS has almost 900 MW of wind interconnected to
  their system today with another 2,000 MW with
  signed Interconnection Agreements. Wind
  curtailments have occurred and can be expected to
  increase in the future. New operating procedures
  and changes to tariff / interconnection
  agreements may be required.
• SPP is working with SPS who is the Balancing
  Authority to determine next steps and create an
  Action Plan
• Potential of further studies to refine analyses
• Share results and next steps with stakeholders

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EWITS Scenario 2
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• Questions?
• Jay Caspary
• Director, Transmission Development
• Southwest Power Pool
• jcaspary_at_spp.org