Wavelet packet diagnosis for wind turbine and vector control for wind power generation system

Wavelet transform was a signal analysis method from domain of time-frequency which was better in the wavelet packet, vibration signal was a carrier of fault features of the wind turbine driving chain, can effectively reflect most of the fault information of the wind turbine drive train. Wavelet transform for feature extraction was proposed as the characteristics of wind turbines in the presence of a large number of transient and non-stationary signals. The SCIG vector control system was designed and the simulation result shows this control system can realize optimal control for large wind energy conversion system which can effectively applied into SCIG wind power generation system for system modification.