Optimal siting and sizing of DG in Radial Distribution System and identifying fault location in Distribution System integrated with Distributed Generation

Abstract

The Distribution Companies (DISCOs) encourage the electricity market by introducing Distributed Generators (DGs) as the ancillary service for its significant benefits in loss reduction. The major issue in this process is the selection of appropriate size and location of DG in improving the performance of distribution systems. This means that the improper sizing and placing may reverse the beneficial factor of DG. Thus, the paper is proposed with a methodology to determine the optimal size and location of DG with an objective of reducing energy loss. The major contribution of this paper revolves with identifying location for DG based on Voltage Stability Index (VSI), impact of placing DG with random size in locations identified by VSI, identifying optimal DG size with feasible location using Particle Swarm Optimization (PSO) algorithm. Faults in the power distribution systems are considered to be the main contributor to the supply interruption and are responsible for poor service continuity indices. A methodology based on IMPEDANCE-BASED METHOD is presented for exact fault location. This proposed technique is tested and verified on IEEE 12 bus Radial Distribution System (RDS). The result shows the substantial reduction of total energy and importance of identifying optimal size and location for placing DG and also identifies the exact fault location.