An Optimal Controlling Approach for Voltage Regulation and Frequency Stabilization in Islanded Microgrid System

Abstract

The control of distributed generations (DGs) with renewable resources is an important endeavor in modern power systems due to the fact that the system frequency and voltages are highly variable in these kinds of networks especially in the island mode. This paper introduces a new combination of conventional controllers for solving the critical problems in islanded microgrid systems. With considering the -phase operation of power networks and comfort controllability of the  system, the general controller is designed based on two mentioned techniques. The indicator of proper performance of studied microgrid controller is to provide reliable electric power in the presence of the transmission line impact and abnormal conditions. The control system parameters are optimized by Imperialist competitive algorithm (ICA) for enhancing the power quality. The effectiveness of recommended method is contrasted with other controllers and studies. The simulation results show the truth behavior of suggested controller for stabilizing the possible transient states.