Robust non-linear control of a wound rotor induction generator: Integral sliding modes

In this paper, we propose a sliding mode - based controller for a wind power system where an induction generator is connected to an infinity bus. To ensure robustness of the closed - loop system with respect to perturbations and plant parameter variations, first, we applied the conventional sliding mode (SM) control technique. Secondly, an integral sliding SM control is designed to reduce a chattering effect. Both the control schemes are proposed to control the electromagnetic torque and the stator reactive power of a wound rotor induction generator coupled with a wind turbine across a gear box. The performance of the designed controllers is validated through simulations.