Wind energy has many advantages, it does not pollute and it is an inexhaustible source. However, evaluation of control schemes for electrical generator is hard with wind turbine, since the wind speed varies. For similar environment of turbine, a wind turbine emulator (WTE) is used.The purpose of wind energy systemsis tomaximize energy efficiency, and extract maximum power from the wind speed. In other words, having a power coefficientis maximum and therefore the maximum power point tracking. in This case, the MPPT control becomes important,To realize this control, strategy conventional proportional and integral (Pi) controller is usually used. However, this strategy cannot achieve better performance. This paper proposes a robust control of a turbine which optimizes its production, that is improve the quality and energy efficiency, namely, a strategy of sliding mode control. The proposed sliding mode control strategy presents attractive features such as robustness to parametric uncertainties of the turbine; the proposed sliding mode control approach was applied to wind turbine emulator with Matlab/Simulink.