Method for judging effectiveness of vibration acceleration data of offshore wind turbine generator system cabin

The invention relates to a method for judging the effectiveness of vibration acceleration data of an offshore wind turbine generator system cabin. The method comprises the following steps that a maincontrol system of a wind turbine generator system acquires vibration acceleration measurement values of two vibration acceleration sensors in the X direction and the Y direction in the wind turbine generator system in real time, and the measurement values are processed and calculated according to the following steps that 1) the main control system of the wind turbine generator system calculates absolute difference values of vibration acceleration measurement values of two vibration acceleration sensors in the same direction in real time according to collected vibration acceleration measurementvalues in the X direction and the Y direction; 2) the main control system of the wind turbine generator system calculates 10s average values of the absolute difference values in all directions in real time according to the ab