WIND POWER GENERATOR AND METHOD FOR DIAGNOSING THE INTEGRITY THEREOF

摘要

The present invention provides a wind turbine generator and a diagnosis method thereof, which diagnoses soundness of an accumulator provided in an oil passage of an oil pressure supply device as an interlock mechanism (safety arrangement) for the oil pressure supply device and soundness of a pitch movement of the blades are diagnosed so that the pitch control can normally work by the gas pressure of the accumulator in emergency, whereby the risk such that the measurement in emergency cannot be taken is reduced, and therefore the reliability of the operation of the wind turbine generator can be improved. The invention comprises an accumulator 49 provided in an oil circuit of the pressure supply device 40 and having a gas chamber for storing the pressure generated by the oil pump 41; a gas pressure judgment unit 81 for judging a soundness on the gas pressure of the gas chamber of the accumulator; a pitch movement judgment unit 83 for judging whether the pitch movement is performed soundly by the oil pressure accumulated in the accumulator if the gas pressure judgment unit judges that the gas pressure is sound; a start judgment unit 85 for judging a start condition to start the gas pressure judgment unit 81 every predetermined period or when a start switch is operated.