Robust sliding mode control for variable speed wind turbine for power optimization

Abstract

This paper presents a strategy of sliding mode control, which solves the problem of power generation for variable speed wind turbine systems. The control objective is to track a wind speed profile to operate the wind turbine in maximum power extraction while reducing mechanical loads. The properties of the proposed controller are robustness to parametric uncertainties, external disturbances, and unmodeled dynamics, also finite reaching time. We use a realistic model which takes into account the nonlinear dynamic aspect of
the wind turbine and the turbulent nature of the wind. In order to validate the mathematical model and evaluate the performance of proposed controller in presence of disturbance, we used Matlab-Simulink. The results show better acquisition of power and reduction of loads in comparison with existing controllers.