A METHOD FOR THE DETECTION OF AN ANOMALY IN A WIND TURBINE BLADE

摘要

The invention relates to a method for identification of the presence of an anomaly in a specific wind turbine blade of a rotor of a wind turbine comprising a number N of wind turbine blades, said number N being an integer greater than one; said method comprises: i) while operating the wind turbine, performing physical measurements of one or more measured physical parameters of the wind turbine, or parts thereof, during a predetermined period of time T or during a predetermined magnitude of rotation R of the rotor; said one or more measured physical parameters being related to a performance yield of the wind turbine; ii) logging the azimuth angle of one or more of said wind turbine blades while performing the measurements in step i); iii) on the basis of step ii) correlating the position of one or more of said wind turbine blades to the measured physical parameter(s) measured in step i); iv) based on the correlation performed in step iii) identifying the presence of an asymmetric and/or unequal performance yield of one or more wind turbine blades amongst the number N of wind turbine blades; v) on the basis of the correlation performed in step iv) determining which wind turbine blade, if any, exhibiting an anomaly; or alternatively, on the basis of the correlation performed in step iv) determining that no wind turbine blades are exhibiting an anomaly.