order to satisfy the on- site consumer in expansion of power demand. Microgrid is one of the key points for research in the field of distributed renewable energy source system. Microgrid that integrates with renewable energy sources is the answer for the crisis in increasing demand of power, T&D expansion which is vulnerable to natural or man- made interruption. In this paper, the transient operation of hypothetical example of microgrid is studied. Thus, the model with generation units (wind turbine)