ANALYSIS OF POWER SYSTEM RELIABILITY IMPROVEMENT FOR 74-BUS RADIAL DISTRIBUTION SYSTEM

In Myanmar, electric power system planning is widely constructed because of more and more load growth and facing with failure of electricity, outage problems and system shut-down. Thus, not only making new power system network but also improving reliability of the existing system using suitable methods is very important to provide an adequate supply of electrical energy to its customers as economically and reliably as possible with an acceptable degree of continuity and quality that is designated by the term power system reliability, the primary function of an electric power system. No one wants to get the electricity interruption. 74- Bus radial distribution system is employed as a test system for a reliability assessment to understand the problems connected with the reliability of the power system and to suggest the most appropriate ways of getting the applicable results. Reliability analysis is carried out with the reliability assessment and reliability indices are calculated by using ETAP software. Also, expected energy not supplied, expected cost and annual service availability index is shown for various cases compared with base case. From the simulation results, the most relevant reliability arrangement for the improvement of radial distribution system is revealed clearly in this paper.