Doubly-fed induction generator control via integral high order sliding modes

In this paper, the integral sliding modes with high order sliding modes is presented to control a wind energy conversion system, with a doubly-fed induction generator connected to a wind turbine. The mathematical model takes into account the dynamics of the generator, the wind turbine and the connections with the electrical network The control objectives are the active power output and power factor regulation in the stator of the generator, which are achieved with the proposed controller without an extra control loop for the machine currents. An observer is not needed, since the control law depends on the terminal voltages and currents only that can be measured directly. A complete stability analysis of the closed-loop system is carried out. The effectiveness of the proposed controller was proved by simulations, in spite of perturbations.