<p>A simple computational model for a small wind power generation system that consists of a wind turbine, a generator connected directly with turbine and a load was investigated. In this report, the load was controlled by maximum power point tracking (MPPT) method that maximizes output power of the generator at any time. With the MPPT control system,relevance of interval time of control to the lag time is important. As the result the effect of parameters such as wind speed,moment of inertia and energy balance between the components of the system for the lag time coefficient was evaluated.</p>