Reliability Study of Electrical Distribution Network in Kampala East
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Date
2023-04
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Kampala International University
Abstract
This research focuses on the reliability study of the electrical distribution network in Kampala East which is connected to Lugogo, Nakawa, Kireka and Ntinda substations. The network is unable to supply its customers with reliable power at all times. Methodology involves data identification, collection, cleaning, analyzing and interpretation. Other methods include determination of reliability indices, identification of causes of supply interruptions and improvement of reliability through network reconfiguration by placement of sectionalizing and tie-line switches on feeders. Depending on the reliability study outcome, the electrical distribution network in Kampala East has customer hours lost (SAIDI) of 8.34 per month per customer, number of outages per month per customer (SAIFI) is 5.65 hours, Energy not served (ENS) to customers of 2.14 GWh per month and Faults resolution time (CAIDI) of 1.58 hours. These values indicate the areas of Kampala East still has reliability problems to deal with and does not agree with the 2022 target set by the utility company Umeme and the Uganda Regulatory Authority (ERA). The major cause of reliability problems in this area are the interruptions due to unplanned shutdowns. In this study, through appropriate combinations of opening of sectionalizing and closing of tie-line switches on feeders, the reliability is improved to 4.18 customers hours lost per month per customer and the number of outages per month per customer is 5.35, the energy not served of 0.18 GWh and faults resolution time of 0.84 Hours.