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US 6,856,039 B2Granted
Variable speed wind turbine generator
AssigneeGeneral Electric Company
InventorsAmir S. Mikhail, Craig L. Christenson, Kevin L. Cousineau, William L. Erdman, William E. Holley
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Abstract
A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional, integral derivative (PID) pitch controller. The torque controller controls generator torque using field oriented control, and the PID controller performs pitch regulation based on generator rotor speed.
Claims29
A variable speed wind turbine system comprising:
- a wound rotor induction generator;
- a torque controller coupled to the generator to control generator torque using field oriented control, wherein the torque controller comprises a torque command generator to generate a torque command and a rotor current torque generator coupled to the wound rotor inductor generator to generate a rotor current torque component in response to the torque command;
- a rotor current generator, coupled to the wound rotor inductor generator, to generate a rotor current flux component in response to the power factor control;
- and
- a pitch controller coupled to the generator to perform pitch regulation based on generator rotor speed and operating independently of the torque controller.
2 more elements
Dependencies are inferred from the claim text.