Fault diagnosis method and device for wind generating set

The invention provides a fault diagnosis method and device for a wind generating set. The method comprises the following steps of: acquiring a current signal and vibration data of a wind generating set; determining the angular displacement of a generator of the wind generating set according to the current signal; determining a first-order spectrum of the wind generating set according to the angular displacement and the vibration data, a first coordinate axis of the first-order spectrum being used for representing the angular displacement, a second coordinate axis of the first-order spectrum being used for representing the vibration data, and the angular displacement comprising a plurality of unit angular displacements; carrying out interpolation processing on the first-order spectrum to enable the number of the vibration data corresponding to each unit angular displacement to meet a preset condition, so as to obtain a second-order spectrum; and analyzing the second-order spectrum by adopting a fault diagnosis