RELIABILITY EVALUATION OF 11KV DISRIBUTION NETWORK FOR GWARINPA HOUSING ESTATE, ABUJA
Publication Date : 01/08/2009
This paper presents the reliability assessment of three (3) 11KV feeders for Gwarinpa distribution network, through the computation of customer based reliability indices: System Average Interruption Duration Index (SAIDI); System Average Interruption Frequency Index (SAIFI); Customer Average Interruption Duration Index (CAIDI); Average System Availability Index (ASAI) and Average Service Unavailability Index (ASUI) as well as other relevant reliability parameters. This aimed at improving awareness among distribution system planning and operation personnel in reliability issues and application, thereby improving the overall system performance and customer satisfaction. Data was obtained from the Gwarinpa office of Power Holding Company of Nigeria (PHCN) Plc for the period of five years (2002 – 2006). Matlab and Microsoft excel are used in the data analysis and representation of the results. The paper also analyzes the contribution of system component failures to the unavailability of power supply for the period under study. The results of the findings have shown that most of the power outages are due to failures of overhead lines, protective/ isolation equipments and failures of lightening arrestors. Network reconfiguration, good workmanship and use of good quality system components would address these problems.
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