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Reliability Analysis of Power Distribution System in Nigeria: A Case Study of Ekpoma Network, Edo State

Onime Franklin 1 and Adegboyega Gabriel A. 2
1. Electrical and Electronics Engineering Department, Federal University of Technology, Akure, Ondo State, Nigeria
2. Department of Electrical and Computer Engineering, Bells University of Technology, Ota, Ogun State, Nigeria
Abstract—Reliability engineering with regard to distribution systems involves gathering outage data and evaluating system designs. The great majority of service interruptions that affect customers are caused by problems on the distribution system. Customer service interruptions in Ekpoma were also caused by failure in distribution substations. Time series load data on the feeders were collected from Power Holding Company of Nigeria (PHCN) daily operational log book from January to December 2012. Outages were classified into types, frequency and durations. The reliabilities of the feeders were evaluated on monthly basis for one year. The average availability of Iruekpen, Irrua, and Express feeders were 0.61, 0.63 and 0.64 respectively. The distribution feeders experience outages on a daily basis due to faults and suggestions were made to minimize system failure in order to improve the reliabilities of the network.

Index Terms—distribution feeders, availability, reliability Indices and distribution networks

Cite: Onime Franklin and Adegboyega Gabriel A., "Reliability Analysis of Power Distribution System in Nigeria: A Case Study of Ekpoma Network, Edo State," International Journal of Electronics and Electrical Engineering, Vol. 2, No. 3, pp. 175-182, September 2014. doi: 10.12720/ijeee.2.3.175-182
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