Nonlinear control for a grid-connected Wind turbine with Induction Generator

This paper addresses the problem of control of wind power generator in variable speed. Sliding mode control strategy presents attractive features such as robustness to parametric uncertainties of the different components of the system. In this way, sliding-mode control laws are proposed for the purpose of generating the maximum power, regulating the DC link voltage and providing unity power factor. The Lyapunov method is employed to guarantee the reaching and sustaining of sliding mode and stability of the control system. Evaluation of the consistency and performance of the proposed sliding mode control approach has been established on a 3MW three-blade wind turbine. Simulation results show that the proposed control strategy is effective in terms of MPPT control strategy and reactive power regulation to guarantee unity power factor.