Controlling and modeling power-electronic interface DERs in islanding mode operation micro grid

Distributed energy resources (DERs) such as micro turbine, wind turbine, fuel cell, photovoltaic system and so on, which are high-efficient, high quality and high reliable electrical sources, are been able to create flexible control on power generation during the islanded mode operation of micro grid by power-electronic interface. Performances of two types of inverter controller (PQ controller and VSI controller) show the important role of each model in balancing and power sharing within the islanded network. PQ controller prepares constant active power at specified power factor and VSI controller regulates frequency and voltage through system. This paper is prepared to model two kinds of controller and then investigated the role of controllers through changing load demand and output power of DERs during the islanded network. Moreover appropriate method for handling DERs such as PQ and VSI controller will be proposed in a simulation program which is developed using MATLAB® for one case study. The results are shown and compared in an abbreviated manner.