Current and voltage control strategy for different form of operation implemented in micro-grid

This paper discuss an increasing development and reduce energy crisis, in electric power with the use of renewable energy sources which plays a main role for continuous power supply. This situation is necessary for micro grid to continue to provide power to the load. In normal condition, each Distributed Generation (DG) system generally works in constant current control mode and provides power to the main grid. The DG system will identify islanding situation and switch to a voltage control mode when the micro grid is cut off from the main grid. The micro grid will provide a constant voltage to the critical load. A control strategy is used to describe grid-connected and intentional-islanding operations of distributed generation.