<![CDATA[The quality of electrical energy received by customers is influenced by the distribution system. It requires an electric power distribution system with good reliability. An electric power distribution system can be said to be reliable if the disturbances and blackouts that occur within a certain period of time are below the established reliability index numbers. The measure of the reliability of a system can be expressed by calculating the SAIFI (System Average Interruption Frequency Index) and SAIDI (System Average Interruption Duration Index), namely how often the system experiences blackouts and how long the outages occur within a certain time span, namely one year. This study aims to analyze the reliability of the electric power distribution system at PT. PLN ULP Dharmo Permai is based on the SAIDI and SAIFI reliability index by using distribution disruption data that occurred during 2019. The steps taken by the author are collecting disturbance data, blackout data, and customer data obtained at PT. PLN (Persero) ULP Dharmo Permai. Then the results of these calculations are compared with the values according to the SPLN 68-2: 1986 and IEEE std 1366-2003 standards. At the ULP Dharmo Permai the Saidi and Saifi values are very good because they do not exceed the limits specified by SPLN 68-2: 1986 and IEEE std 1366 - 2003.]]>
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