Patent ID: 8080890
Filing Date: 2011-12-20
Classification: F03D,F05B,Y02E

Abstract:
1. A method for the operation of a wind turbine comprising a rotor with at least one rotor blade, a generator and a speed regulator ( 22 ) for regulating the rotational speed of a drive train element by adjusting a generator torque (T) and/or a blade pitch angle (θ), comprising the steps of: determining the angular speed (ω) of the drive train element through the time derivative of an angular position signal (φ), determining the angular acceleration (α) of the drive train element, presetting desired values for said generator torque (T) and/or said blade pitch angle (θ), taking into account the angular speed (ω) of the drive train element and the angular acceleration (α) of the drive train element, characterised in that the angular acceleration (α) of the drive train element is determined from the angular position signal (φ), wherein a filtering with an upper cut off frequency is performed after the first time derivative of the angular position signal (φ) and before a second time derivative of the angular position signal (φ), said upper cut off frequency being tuned to a maximum adjustment speed of said generator torque (T) and/or of said blade pitch angle (θ).