Design of control system based on adaptive sliding mode theory for power tracking in a brushless doubly-fed wind turbine

In this paper, a control system based on adaptive sliding mode theory is designed to track active and reactive powers in a wind turbine with a brushless doubly-fed induction generator. The dynamics of this type of turbine are nonlinear and include parametric uncertainties and perturbations such as wind speed changes. Therefore, to control this nonlinear and uncertain system, sliding model theory has been used. Due to the unknown of the bound of various uncertainties in this system, the adaptive type of sliding mode is used. In this method, the controller gain is considered as a variable with time and is designed to converge to the uncertainties upper bound. The proposed designed controller in a complete simulation in MATLAB software, on the model of a brushless doubly-fed wind turbine, is evaluated and the good performance of this proposed method in comparison with standard sliding model methods and the classical PID controller is shown.