Patent ID: 7905704
Filing Date: 2011-03-15
Classification: F03D,F05B,Y02E

Abstract:
1. A method for operating a wind energy plant with a rotor having rotor blades which have an adjustable blade pitch, wherein the wind energy plant is in full load operation in which a control of a rotational speed is performed by setting a desired value of the blade pitch and the adjustment of the blade pitch takes place with an adjustment velocity and/or an adjustment acceleration, wherein the magnitude of the adjustment velocity and/or the magnitude of the adjustment acceleration is depending from the desired value and an actual value of the blade pitch, and presetting of the adjustment velocity and/or of the adjustment acceleration takes place in a constant clock cycle in which the desired values are preset and the adjustment velocity and/or the adjustment acceleration is selected for a time interval such that at the end of the time interval, the actual value of the blade pitch has substantially, but not completely reached the desired value acquired at the beginning of the time interval, so that no sudden braking down of the shifting movement takes place before the end of the time interval, but instead the shifting movement is not yet completed at the end of the time interval.