Patent ID: 8977401
Filing Date: 2015-03-10
Classification: F03D,F05B,H02P,Y02E

Abstract:
1. A wind turbine, comprising: a wind turbine rotor comprising one or more blades, a generator coupled to the wind turbine rotor, a yaw actuator configured to adjust a yaw angle of the wind turbine, a generator temperature controller, and an estimator configured to estimate a temperature of the generator using a measured value of at least one of stator and rotor currents associated with the generator and provide the estimated temperature to the generator temperature controller, wherein the generator temperature controller includes a closed-loop regulation arranged to determine a deviation of the estimated temperature from at least one desired value, compute the magnitude of at least one control output in proportion to the determined deviation, and provide the at least one control output to at least one controller of the wind turbine in order to reduce the determined deviation, and the at least one controller of the wind turbine comprises control logic configured to control the operation of the yaw actuator in response to the at least one control output by changing the yaw angle of the wind turbine which influences the at least one temperature of the generator.