Energy-Based Robust Control of Doubly-Fed Induction Generator

This paper presents a novel nonlinear robust controller for a doubly-fed induction generator based on passivity and high-order sliding modes techniques. The control objectives are the power factor and stator active power output regulation. At first, a state reference vector is defined according to the desired operation point taking into account the control objectives. Then, to take advantage of the passivity properties of the system, a sliding manifold is selected as a function of the Hamiltonian around the desired operation point. Finally, to add robustness and complete the proposed control scheme, the high-order sliding mode technique is applied with the designed sliding manifold by means of the super-twisting algorithm. This combination enables to reject the effect of the external disturbances due to the interconnections with electric power systems and parameter variations. The developed control scheme was tested through simulation to prove its effectiveness despite small and large disturbances.