Takagi–Sugeno fuzzy-based integral sliding mode control for wind energy conversion systems with disturbance observer

The wind energy conversion system (WECS) is a system which allows the conversion of wind-generated kinetic energy to electrical energy. One of the currently used systems to generate electrical energy is the permanent magnet synchronous generator. The proposed control method in this paper is Takagi–Sugeno (T–S) fuzzy model-based integral sliding mode control (ISMC). The ISMC method performs robustness to external disturbances and noises. The one important issue of the WECS is the variable wind speed which varies drastically over short periods of time. The solution to the problem of the wind speed estimation is the disturbance observer application which was also used to estimate the wind speed. The use of T–S fuzzy model is justified by the robustness to unmatched disturbances. The novelty of the proposed combination of control techniques is the solution to problems of nonlinearity, estimation of the aerodynamic torque and the chattering natural for sliding mode control. The simulation was conducted in MATLAB/Simulink software. The results are provided in the result-related section.