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DOE explores potential of wind power to stabilize electric grids

By Michelle Froese | March 28, 2016

DOE’s 1.5-MW wind turbine at the National Wind Technology Center is being used to demonstrate that wind farms can provide the frequency-responsive back-up or “ancillary services” currently supplied to the electrical grid by conventional power plants. (Photo by Dennis Schroeder/National Renewable Energy Laboratory)

DOE’s 1.5-MW wind turbine at the NWTC is being used to demonstrate that wind farms can provide the frequency-responsive back-up currently supplied to the electrical grid by conventional power plants. (Photo credit: Dennis Schroeder | NREL)

Editor’s note: This article discusses the U.S. Department of Energy’s (DOE) research on using wind power as a frequency-responsive back-up agent for the grid. It is written by Jim Ahlgrimm, Wind-testing Infrastructure Manager at the DOE.

 

When the DOE commissioned a 1.5-MW wind turbine in 2009, it became a key player in our research to improve the performance and lower the costs of wind-energy systems.

In 2015, researchers at the National Wind Technology Center (NWTC) near the National Renewable Energy Laboratory (NREL) in Golden, Colorado, connected the 300-foot-tall turbine to the controllable grid interface (CGI) test facility, which simulates the real-time conditions of a utility-scale power grid.

This began an ongoing, DOE-funded research effort to test how wind turbines can remain connected to the grid during short periods of grid failure.

Why is this research important?
When a large electricity-generating plant (whether gas-burning, coal-burning, nuclear, or hydropower) shuts down, the frequency of the electric power grid drops due to an imbalance between generation and load. As a result, utility operators must increase the power output of generators at other conventional power plants to stabilize the frequency.

DOE researchers are evaluating the potential of wind farms to provide frequency-responsive back-up or “ancillary services” currently supplied to the grid by conventional power plants. That’s where the future is going.

We’re using our 1.5-MW turbine for this effort because it’s the most common wind turbine in the country and will demonstrate results that can be considered typical and can be applied widely to many of today’s wind farms.

The controllable grid interface test facility at the National Wind Technology Center makes it possible to research the effectiveness of wind energy in providing ancillary grid services such as frequency control. (Photo by Dennis Schroeder/NREL)

The controllable grid interface test facility at the NWTC makes it possible to research the effectiveness of wind energy in providing ancillary grid services such as frequency control. (Photo credit: Dennis Schroeder | NREL)

The NWTC is the only facility in the world where this research is conducted at a multi-megawatt scale under controlled grid conditions. The CGI provides a unique environment where wind turbine vendors can test their equipment under any possible grid fault condition.

Researchers such as Mark McDade, project manager for grid integration at the NWTC, and Vahan Gevorgian, NREL technical lead, can experiment with various grid conditions and test how utility-scale wind turbines can provide ancillary services for enhanced grid reliability.

For the energy industry, this ability helps save time and resources while minimizing integration issues, improving reliability, and advancing development of grid-friendly renewable and emerging energy technologies.

Together, DOE’s 1.5-MW turbine and the CGI are proving to be a winning research combination, helping stabilize electric grids and, by doing so, drive down costs, increase wind power installations, and create a renewable energy economy in the United States. Learn more about the U.S. Department of Energy’s Wind Program.


Filed Under: News

 

About The Author

Michelle Froese

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