In this paper, the wind electrical conversion system (WECS) is described; the structure of WECS is based on the Induction generator. The global model of the WECS is presented. A study of the electrical parts (Induction machine and static converter) is developed. The goal of this paper is to control the power generated by the WECS to the grid. A strategy of control is developed signed based on the vector control applied to Induction Machine. A new controllers are designed using variable structure control with sliding mode to control active and reactive power. Simulation study was done to prove the validation of the strategy of control used and to show the high performance and robustness of the control technique used in power control.