METHOD FOR ESTIMATING WIND VELOCITY DISTRIBUTION PROFILES FOR WIND TURBINES

摘要

The invention relates to methods for estimating the wind velocity distribution profile (36, 38, 40) during the operation of wind turbines (10, 30), which have a generator and a plurality of rotor blades (14, 16, 18, 32, 34, 64, 68), which can be rotated (24) about a rotor hub (20) and which each have an adjusting drive for the individual pitch adjustment (64⇔ 68) of the rotor blade, wherein furthermore a control system is provided for controlling the adjusting drives. The method comprises the following steps: • detecting at least one instantaneous rotor-blade-independent wind-dependent measured value, in particular the wind velocity at the hub height, the rotational speed of the rotor, or the electrical power output by the generator, • detecting the instantaneous rotor angle of rotation (26), • detecting at least one instantaneous rotor-blade-specific wind-dependent measured value, • determining the instantaneous wind velocity distribution profile (36, 38, 40) by using the at least one rotor-blade-independent wind-dependent measured value, the rotor-blade-specific wind-dependent measured value, and the rotor angle of rotation (26), • providing the determined wind velocity distribution profile (36, 38, 40) to the control system, • wherein said steps are repeated continuously so that a course of the examined values over time is produced.