Robust control based on the Lyapunov theory of a grid-connected doubly fed induction generator
1. LGEB Laboratory, Department of Electrical Engineering, Biskra University, Biskra 07000, Algeria; 2. LSPIE Laboratory, Department of Propulsion-Induction Electromagnetic Electrical Engineering University of Batna, Batna 05000, Algeria
This paper discusses the robust control of a grid-connected doubly-fed induction generator (DFIG) controlled by vector control using a nonlinear feedback linearization strategy in order to ameliorate the performances of the control and to govern the developed stator active and reactive power in a linear and decoupled manner, in which an optimal operation of the DFIG in sub-synchronous operation is given, as well as the control stator power flow with the possibility of keeping stator power factor at a unity. The use of the state-all-flux induction machine model gives place to a simpler control model. So, to achieve this objective, the Lyapunov approach is used associated with a sliding mode control to guarantee the global asymptotical stability and the robustness of the parametric variations.