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ERCOT Wind Energy Integration and Forecasting Strategies

Learn about ERCOT, the only intra-state electric grid in the U.S., with 8,290 MW installed wind capacity as of 2008. Discover key data on energy mix, peak demand, and reserve margin to understand wind energy production within the grid.

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ERCOT Wind Energy Integration and Forecasting Strategies

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  1. Texas Wind Energy American Meteorological Society Summer Community Meeting – Norman Oklahoma Henry Durrwachter, P.E. August 12, 2009

  2. Installed Wind Capacity

  3. Electric Reliability Council of Texas (ERCOT) • The only intra-state electric grid in the U.S. • 3 Direct Current (DC) ties to the Eastern Interconnect (2) or Mexico (1) • Serves about 20 million customers (85% of Texas load) over 200,000 sq. miles of territory (75%) • 38,000 miles of high voltage transmission lines (345 kV, 138 kv and 69 kV) • Non-profit organization regulated by the Public Utility Commission of Texas (PUCT) Graphic courtesy of ERCOT

  4. ERCOT Reserve Margin and Energy Mix 2008 • 169 generating plants (72,500 MW of capacity at peak) • 2008 Peak demand = 62,174 MW • 16.6% Reserve Margin* (12.5% minimum) • 580+ thermal generation units • Over 8,000 MW of wind generation *Estimated 309 Million MWh

  5. Installed Wind Generation in Texas 8,290 MW Installed as of 12-31-2008 31 33 In ERCOT Outside ERCOT

  6. Monthly Energy Production – West Texas Wind Farm

  7. Peak Load Hour 11.7% ERCOT Summer Peak Month Coincidence (Hourly Average) - 2008

  8. High ramp rates Hourly Variability of Wind January 5, 2007 – Total Installed Wind Capacity = 2,790 MW

  9. Scenario 2 - 18,456 MW of Wind - $4.93 Billion Miles of New ROW: 345 kV = 2,334 138 kV = 42

  10. Questions Q: What is the proper role for government, industry and academia? • Government – provide access to appropriate weather data • Industry – willingness to utilize the latest tools and techniques to better forecast wind energy production • Academia – research better ways to forecast wind energy production Q: What are the primary knowledge gaps? • Correct modeling and forecasting of low-level jets and their impact on wind generation production (according to our staff meteorologist) Q: How can all parties leverage their expertise to move the nation forward to improve the adoption of renewables? • Learn from others’ experiences • Recognize the shortcomings of renewable technologies (variable fuel supply, non-dispatchability) and • create innovative methods, procedures or incentives to address those shortcomings through new or existing generating technologies or control systems.

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