Method for estimating wind speed distribution profiles in wind turbines

摘要

The invention relates to methods for estimating the wind speed distribution profile (36, 38, 40) during operation of wind power plants (10, 30), which have a generator and a plurality of (24) rotor blades (14, 16, 18, 32) rotatable about a rotor hub (20) , 34, 64, 68) with a respective actuator for their individual pitch adjustment (64 ⇔ 68), wherein furthermore a control system for driving the actuators is provided. The method comprises the following steps: Detection of at least one instantaneous wind turbine-independent wind variable, in particular the wind speed at hub height, the rotational speed of the rotor or the electrical power output by the generator, detection of the current rotor rotational angle 26, detection of at least one instantaneous wind speed Rotor blade-specific wind-dependent measured variable, • determination of the instantaneous wind speed distribution profile (36, 38, 40) using the at least one rotor blade-independent wind-dependent measured variable, the rotor blade-specific wind-dependent measured variable and the rotor rotation angle (26), • provision of the determined wind speed distribution profile (36, 38, 40) to the control system, wherein said steps are repeated continuously, so that a temporal course of the variables considered results.