Fault Tolerant Control of Wind Turbine Systems using Fuzzy Sliding Mode Control

This paper designs a robust control system for wind turbines using a fuzzy sliding mode controller. Due to the increasing use of wind turbines and the importance of reliability and efficiency of these systems, in this paper the tolerance of wind turbine system using a combination of classical nonlinear and intelligent control methods against the occurrence of possible faults has been investigated. The wind turbine system based on the permanent magnet synchronous generator has been studied in this paper. In the design of the fault tolerant controller, a combination of the sliding mode controller based on advanced exponential acquisition law and fuzzy system is employed and the control goal is to track the reference input when the system is under fault conditions. Also, the designed controller is able to reduce the chattering phenomenon. To evaluate the performance of the proposed control system, simulated faults with different characteristics such as amplitude, occurrence time and dynamic change speed have been developed. Results confirm that the designed controller is robust against to actuator faults in the wind turbine system. Also, the output voltage is perfectly set to the constant reference value.