Grid Connected Efficient Controller to improve Power Quality using Islanding Operation

Abstract — This paper summarize the problems and solutions of the power quality in microgrids. Here control technique is implemented to operate micro grid in both grid connected mode called current controlled mode and grid disconnected mode called voltage controlled mode. A new algorithm implemented to identify the islanding mode and it operates the grid in intentional mode which is called islanding mode where DG and load is isolated from the utility system. This simple control strategy in micro grid model is realized with MATLAB and necessary paramaters are designed by using simulink model. A reclosure algorithm has been used for DG to resynchronize the inverter voltage with the grid. The quality of power can be improved by this proposed method