Availability Assessment of Three 11kv Feeders Benin City, Edo State, Nigeria

Abstract

Nigeria’s power supply has been experiencing incessant interruptions due to failures in the distribution system. The availability assessment of power system is a necessary criterion in meeting the customer’s demand. In this study, the availability of three 11kv feeder in Benin Electricity Distribution Company (BEDC), Edo State Nigeria were evaluated. These was carried out by collating the failure data which includes; time of failure, time outage was restored, outage duration, causes of failure, and load interruption from the Injection substations G.R.A Injection substations for the years, 2020 and 2021 using Monthly and Yearly data. Mean time between failure (MTBF), Mean time to repair (MTTR), failure rate, repair rate, availability evaluated for the analysis. The results of the analysis reveals that there was a decrease for MTBF for the feeders (which implies decline in Performance). The year 2021 had the accumulated higher MTTR than 2020 as a result of decline in response to faults except for Ihama Feeder. After the computations, the year 2020 had a better availability than the year2021