Wind energy is one of the most important sources of renewable energy globally with economic justification worldwide. Due to the growing needs for electrical energy, increased environmental pollution and limitations in fossil fuel resources, the use of wind energy in the power industry is increasingly necessary and inevitable. The broad use of wind turbines in the power system have caused turbines to have a dominant place in these systems. Because of the better power quality of variable speed wind turbines, they are more appropriate than the constant speed turbines. Advantages such as good quality control, high efficiency, improved power quality, no need for capacitor banks and cost effectiveness in doubly fed induction generator (DFIG) mean that they are increasingly being used. This paper presents a study of speed control of a doubly fed induction generator according to the sliding mode controller using a simulation in the MATLAB/Simulink environment and the simulation presented results that demonstrated the ability of the proposed control strategy.