Microgrid Control in Islanding and Connected Mode

In common practice a Microgrid can operate while connected to a MV network. When a preplanned or unplanned event like holding or occurring fault occurs in the MV network it is possible to cause the islanding state in the Microgrid. In this Paper the operation of the MV network in the islanding mode and how to control the Microgrid by using the controlling structure are investigated. In this paper the conventional droop method has been described and a new controlling methods for controlling the Microgrid are also proposed which in the first method the AC power theory for the controlling of the Microgrid. For comparing these two methods with the controlling method which is proposed in reference [14], these three methods have been simulated with PSCAD/EMTDC software.