Analysis and Improvement of Distribution System Reliability by Optimization of Distributed Generation

Abstract

The three components of a power system are generation, transmission, and distribution. The distribution system, which provides power to meet demand, is the main part of the power system. A measurement of the consistency and reliability of the power supply to consumers is the distribution system reliability assessment. Additionally, it offers details on the system's operation and aids in determining the expenses or losses a power outage will cause the utility and the consumer. This paper uses a variety of EEU data collected to analyze reliability and improve the Woldia distribution system. System reliability indices for the cases show that the system indices (SAIFI = 103.624 in./yr, SAIDI = 891.4559 hr/yr, CAIDI = 8.603 hr/int, ASAI = 0.8982 pu, and EENS = 4904.725 MWhr/yr) of the system is unreliable. A PSO is used to optimize the appropriate location and size for 1.2 MW of DG units, and the effectiveness of the suggested methodology is evaluated on a 15 KV outgoing Woldia University feeder. Following optimal DG allocation, the radial distribution system's reliability over the previous system is increased. The suggested method outperforms the current system, as shown by the test results, which show a 46.097% reduction in EENS, a 47.377% reduction in SAIFI, and a 47.695% reduction in SAIDI. Generally speaking, the findings show that increasing the test system's reliability requires determining the exact size and placement of distributed generation.