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Large Wind Integration Challenges and Solutions for OperationsSystem Reliability

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Over1,000 wind turbines. 5 new substations for wind farms. 6 tap lines for wind farms. 75% of the wind serves load outside BA balancing area ... – PowerPoint PPT presentation

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Title: Large Wind Integration Challenges and Solutions for OperationsSystem Reliability


1
Large Wind Integration Challenges and Solutions
for Operations/System Reliability
Integrating Renewable Resources into the Electric
Grid
Lake Roosevelt Forum Spokane, Washington April
13, 2009
Photo courtesy of PPM Energy
Syd Berwager Director, Strategy Integration
2
Substantial BPA Wind Energy Experience
  • Over 2,000 MW of wind in its 10,500 MW peak load
    balancing area (BA)
  • 19 wind farms
  • Over1,000 wind turbines.
  • 5 new substations for wind farms
  • 6 tap lines for wind farms
  • 75 of the wind serves load outside BA balancing
    area
  • 4,716 MW, (74 ) of Network Open Season requests
    were wind generation

3
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4
Very High Wind Penetration
5
Understanding Wind
BPA views wind primarily as an energy, rather
than a capacity resource.
  • High Value
  • Reduces carbon emissions
  • Low, stable fuel price
  • Variable and Uncertain Supply
  • Increases need for balancing reserves
  • Requires changes in system operations
  • BPA exploration of innovative approaches

6
BPA Balancing Authority Total Wind Generation and
Wind Basepoint24 Dec 2008 31 Dec 2008
Based on 5-min. readings from the BPA SCADA
system for points 79687, 103349 Balancing
Authority Wind Generation in Blue, Wind Basepoint
in Red Installed Wind Capacity 1592 MW BPA
Technical Operations Roy Ellis (rcellis_at_bpa.gov)
7
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8
BPA Steps Taken
  • Network Open Season
  • Conditional Firm Service
  • ACE diversity interchange
  • New transmission construction financed
  • Improving Automatic Generation Control

9
Three wind integration services
  • Regulation
  • Moment-to-moment deviations between generation
    and load
  • Following
  • Difference between actual and scheduled load and
    generation (10 minute time increments)

Generation imbalance Difference between amount
scheduled at the beginning of an hour and amount
actually produced during the hour
10
More than hydro alone can handle
  • Demands on FCRPS
  • Serve load
  • Non-power obligations
  • Support variable generation
  • Current estimated support capability
  • 3,000 3,500 MW of wind generation
  • New tools required beyond this level

11
New BPA Approach
  • Establish quantity of balancing reserves to be
    made available
  • System studies wind and hydro
  • Cost estimates
  • Establish operational protocols to assure
    generators to stay within balancing reserve
    limits
  • Feathering of wind projects that are
    substantially over-generating
  • Curtailing of schedules for wind projects that
    are substantially under-generating
  • 90 of reserves used as trigger point
  • Relative to scheduled amount

12
Focus on Five Critical Areas
  • New Operational Protocols
  • Dynamic scheduling
  • Third-party supply
  • Improving wind generation forecast accuracy
  • New Transmission Scheduling Practices and
    Procedures

13
Long-term solutions
  • Transmission Additions
  • Flywheels
  • Pumped storage
  • Compressed air
  • Demand-side storage and load management

14
Conclusions
Large Wind Integration Challenges and Solutions
for Operations/System Reliability
  • Wind is a valuable addition to the Pacific
    Northwest renewable generation mix
  • Winds contribution will continue to grow rapidly
  • Integration of wind generation presents new
    challenges
  • BPA has actively supported wind development and
    will pursue further innovations
  • Longer term solutions will involve advances in
  • Wind-forecasting
  • Utility operational protocols and business
    practices
  • Technology
  • Demand response

Photo courtesy of PPM Energy
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