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To diagnose the fault in the pitch actuator of wind turbines, a fault diagnosis method is proposed in this paper, which is based on the variable forgetting factor recursive least-squares(VFF-RLS) algorithm. According to the characteristic that the system parameters are changed by faults, the VFF-RLS system identification algorithm is adopted to estimate the changing parameters. The fault diagnosis...
The dynamic response of the pitch angle slows down when the pitch actuator of wind turbines fails, and the fault leads to fluctuations in the generator speed and in the output power. According to identification and analytical theories, a fault-tolerant control combined with fault estimation is proposed to solve this problem. The simplified two-order transform function of the pitch actuator is transformed...
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