RELIABILITY, AVAILABILITY AND MAINTAINABILITY ASSESSMENT OF SELECTED 11KV FEEDERS

ABSTRACT
In this present time, demand of electric energy is increasing rapidly with technological and economic growth and the energy demand of the customers supposed to be met. However, Nigeria’s power supply has been experiencing incessant interruptions due to failures in the distribution
system. These requires the need for the Reliability, Availability, and Maintainability assessment of three feeders (G.R.A Etete, Ihama, and Oko) in Benin Electricity Distribution Company (BEDC).
These was carried out by collating and collecting the failure data which includes; outage time, time
outage was restored, causes of failure, and load interruption from the Injection substations for the
year, 2020 and 2021. The repair time and failure time was computed after which the following
approaches; Monthly trend analysis, Non parametric method (Distribution Free Method),
Customer based reliability indices (SAIFI, SAIDI, CAIFI, CAIDI, ASAI, and ASUI) and parametric method (Exponential and Weibull Distribution) were deployed for the analysis.