This paper treats the issue of wind energy storage, mechanically, using the flywheel device. We control the speed of the wind turbine and the flywheel by means of traditional PID controllers. These controllers are designed depending on the system model and its parameters. Speed control is achieved by electromagnetic rotor flux orientation as called vector control. Speed reference value of the wind turbine will be generated in order to track the maximum power point. The flywheel reference speed is generated based on a second order filter of power which is considered as a new contribution in this field of research. Frequency converters are not modeled but we only consider the control strategy. The results of modeling and simulation in Matlab satisfy the power smoothing issue and reflect the importance of this study.