Patent ID: 7550862

Claim:
A wind energy installation, comprising: a pylon, a machine housing arranged on the pylon and having an azimuth position that can be adjusted by means of a pivoting device, a rotor configured to rotate on an end face of the machine housing and to drive a generator for production of electrical power, measurement devices for measurement of wind speed and direction and of an electromechanical quantity, a controller for the pivoting device, and a calibration module for the controller that comprises an efficiency measure element configured to calculate an efficiency measure for the production of the electromechanical quantity via the wind speed and an evaluation device, the evaluation device comprising a classifier with a first output for a first class with a positive wind direction, and a second output for a second class with a negative wind direction, to which a first calculation element for determination of a first mean value of the first class and a second calculation element for determination of a second mean value of the second class are connected, and a comparator element which is designed to determine the difference between the mean values of the first and second classes and to output a calibration signal corresponding to the difference to the controller for the pivoting device.