T-S fuzzy robust fault-tolerant control strategy for wind energy conversion system

In this paper, a new fault tolerant control scheme for wind energy conversion system (WECS) is proposed considering the partial failure of actuators. By building and analyzing the state equation of WECS, actuator continual gain faults of WECS is converted into system parameter uncertainties. The T-S fuzzy theory is employed for the modeling of WECS with this parameter uncertainties. Using parallel distributed compensation state feedback structure, a robust fault-tolerant controller is designed as WECS suffers from actuator fault. Simulation results indicate that system with the proposed controller can still achieve maximum wind energy capture below the rated wind speed under actuator fault.