Patent ID: 7714458

Claim:
Method for operating a wind energy plant, the wind energy plant having a rotor with at least one rotor blade which has an adjustable pitch angle, the wind energy plant having a generator coupled to the rotor, and a regulation means which, if there is a deviation of the rotation speed of the generator or rotor from a rotation speed set point, adjusts the pitch angle of the at least one rotor blade such that the rotation speed set point is reached again, wherein an electrical quantity provided by the wind energy plant by means of a generator and fed into a grid is reduced to a predetermined value in a short time by reduction of a preset value for the generator, characterized in that prior to the regulation means ( 12 ) noticing a deviation of the rotation speed of the rotor or generator (n GI ) from the rotation speed set point (n GS ) effected by the reduction of the preset value, an adjustment of the at least one rotor blade to a new pitch angle (υ) is initiated, wherein at the new pitch angle (υ) the rotation speed of the rotor or generator (n GI ) reaches the rotation speed set point at the reduced electrical quantity (P 1 , P 2 , P 3 , P 4 , P 5 ) and the current wind speed (V Wind ).