Pitch-Controlled Variable-Speed Wind Turbine Generation

Research output: Contribution to conferencePaper


Wind energy is a viable option to complement other types of pollution-free generation. In the early development of wind energy, the majority of wind turbines were operated at constant speed. Recently, the number of variable-speed wind turbines installed in wind farms has increased and more wind turbine manufacturers are making variable-speed wind turbines. This paper covers the operation ofvariable-speed wind turbines with pitch control. The system we considered is controlled to generate maximum energy while minimizing loads. The maximization of energy was only carried out on a static basis and only drive train loads were considered as a constraint. In medium wind speeds, the generator and power converter control the wind turbines to capture maximum energy from the wind. In thehigh wind speed region, the wind turbine is controlled to maintain the aerodynamic power produced by the wind turbine. Two methods to adjust the aerodynamic power were investigated: pitch control and generator load control, both of which are employed to control the operation of the wind turbine. Our analysis and simulation shows that the wind turbine can be operated at its optimum energy capturewhile minimizing the load on the wind turbine for a wide range of wind speeds.
Original languageAmerican English
Number of pages8
StatePublished - 1999
Event1999 IEEE Industry Applications Conference: 34th Annual Meeting - Phoenix, Arizona
Duration: 3 Oct 19997 Oct 1999


Conference1999 IEEE Industry Applications Conference: 34th Annual Meeting
CityPhoenix, Arizona

Bibliographical note

For preprint version, including PDF, see CP-500-27143.

NREL Publication Number

  • NREL/CP-500-28065


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