UN METODO PARA LA IDENTIFICACION DE LA FRECUENCIA PRINCIPAL DEL TREN DE POTENCIA DE UN AEROGENERADOR.

摘要

Method for the identification in operation of the drive train main vibration frequency of a wind turbine, comprising online steps of: a) obtaining a input signal (r) of the generator speed (©) ; b) filtering the generator speed input signal ( r ) for obtaining a generator speed signal ( r1 ) in a suitable band for representing the oscillating signal ( o ) comprised in the input signal ( r ) of the generator speed (©); c) extracting the drive train main vibration frequency (f) from said filtered signal ( r1 ). The invention also comprise a method of damping the drive train vibrations of a wind turbine comprising steps of setting the generator torque reference (Tr ref ) as a function of the generator speed ( © ) and of the drive train main vibration frequency (f) identified by the above mentioned method and wind turbine control system implementing said damping method.