Improvement in Voltage Stability by Optimal Placement of Distributed Generation

摘要

Loss reduction is important for utility companies as it directly increases company benefit in a competitive electricity market. Beside reaching power quality standards, it is too important as it has vital effect on customer orientation. This article presents an approach for the analysis of performance of distribution system employing distributed generation (DG) using the voltage stability index (VSI). Two generalized models of DGs are considered in the load flow for the detailed analysis. There is also improvement in power losses of the system using DG units. The differential evolution algorithm is used for finding the optimal position and size. The simulation study is carried out in IEEE 69 bus radial distribution system using MATLAB. Results show the efficiency of the proposed algorithm in reducing power loss, and improving voltage profile in voltage sensitive buses.