Adaptive Fault-tolerant Pitch Control of Wind Turbines

In order to effectively cope with the influence of internal/external factors on the wind turbine pitch control system and solve the dynamic uncertainty of the system, this paper proposes an adaptive fault-tolerant pitch tracking control method. A dynamic model of the wind turbine pitch control system is established with considering the aerodynamic resistance, partial actuator failure, unknown and time-varying system parameters and other factors suffered by wind turbines during actual operation. This method does not involve the specific values of unknown parameters in the controller design and can avoid continuous control parameter adjustment process. Besides, it can well handle the impact of actuator losses on the pitch system. Simulation results show that the proposed method is feasible, and the experiment further prove that the method can achieve stable pitch angle tracking control target and has practical application value.