Performance Evaluation and Impact Analysis of Distributed Generation on Radial Power Distribution System

Abstract

This research focuses on evaluating and analyzing the behavior of smart grid power distribution system with multiple, interconnected distributed generations (DGs). This topic is especially relevant to Thailand, which employs a radial distribution topology and has insufficient use of energy storage system (ESS). Integration of DGs with distribution power systems is a necessity to achieve reliable and efficient performance. The characteristics of each category of DGs must be studied to improve the power system. The main task of the interconnected system is to control and maintain voltage of the power system in an acceptable range for high reliability, efficiency and quality. The proposed study consists of two critical objectives. Firstly, we will investigate the principle operation of DGs that uses renewable energy sources interconnected with the smart grid. The second and final goal is to evaluate and analyze the impact of DGs on the power distribution system. Power injection from DGs can reduce total power loss and improve system performance. In addition, the presence of DGs can increase the voltage level and robustness of the system more than traditional electrical network. However, high penetration of DGs may have an effect on voltage changes at the bus.