Accurate modeling of the wind energy conversion system is necessary to design and implementation of the control loop for the generator and the frequency converter, in order to extract maximum power from the wind and to investigate the effects of interconnection between wind farms and power system. In this paper the combination of a permanent magnet synchronous generator loaded with a diode rectifier, used in wind energy conversion system, is modeled using a state machine approach. The model is validated through comparison of the proposed model and the experimental results.