Optimal DG allocation for enhancing voltage stability and minimizing power loss using hybrid gray wolf optimizer

Abstract

High penetration of photovoltaic and wind turbine-based distributed generators (DGs) can help reducecarbon emissions which is an important goal for the whole world. DG can be used to improve the voltage stability,present generation reserve/emergency, and consequently, the system power quality can be improved. However, it isvery important to select the right size and location of a DG so that the power system can increase the gained benefitsof such an installation to the maximum. In this paper, a hybrid optimization technique is proposed to determine theoptimal allocation of DG in the standard IEEE 33-bus radial distribution system in order to improve the voltage stabilityand minimize the total power loss. The proposed hyprid technique is based on the gray wolf optimizer algorithm withloss sensitivity factor. The performance of the system is analyzed without DG installation, then it is compared withthe performance of the system when DGs are installed with the predefined optimal sizes and locations. The study isperformed by MATLAB M-Files and NEPLAN software.