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In this paper a variable structure control based on a sliding mode control (SMC) of a doubly fed induction generator (DFIG) grid-connected wind energy conversion system. incorporating a maximum power point tracker (MPPT) for dynamic power control has been presented. This structure has been used for reference tracking of active and reactive powers exchanged between the stator and the grid by controlling the rotor converter. Simulation results show good decoupling between stator active and reactive power and good performance obtained in the presence of the variations of wind speed. The obtained results demonstrate that the proposed DFIG system control operating at the variable speed may be considered as an interesting way for problems solution in renewable energy area.
