A Stability Index Based Analytical Technique for Optimal Placement of Various DG Types in Distribution Networks

This study presents a stability index based analytical technique for the optimal siting and sizing of different types of Distributed Generator (DG) unit in the distribution networks (DNs) with the objective to reduce line losses, improve voltage profile, and decrease pollution level. In order to identify the most appropriate location for DG placement, Voltage Stability Index (VSI) is utilized. A new formula is developed for the purpose of converting the multi-objective functions into a single-objective that is then minimized using the proposed analytical approach to obtain the optimal rating of DG. Furthermore, with an aim to judge the technical and environmental impact of DG, innovative and unique formulas are developed in this paper. Depending upon the reactive power absorption or generation ability, DG is classified into three types and using the proposed methods, optimal allocation is conducted separately for each type at different loading conditions. In addition, an analysis is executed based on their optimal performances to identify the most suitable type of DG for integrating into the power system.