Analisa Keandalan Sistem Distribusi Tenaga Listrik 20 kV Dangan Indeks Saifi dan Saidi pada PLN ULP Manahan

Electrical energy is needed for all people In this very modern era,. Then it needs to be considered in the electricity distribution service, so that consumers can feel the continuity in the distribution of electricity. An electric power distribution system can be said to be reliable if disturbances and outages occur within a certain period of time below the specified reliability index number. Determine the reliability of the distribution system, it is necessary to calculate the SAIFI index (System Average Interruption Frequency Index) which can be seen from how often (frequency) there is a one-year outage and the SAIDI (System Average Interruption Duration Index) which can be seen from how long blackouts for a year. This research takes data at PLN Surakarta UP3 and his research at PLN ULP Manahan using data in 2018. These data according to IEEE standards 1366 - 2003, GDO.2 feeders are categorized as less reliable because the SAIFI value exceeds the standard limit of 1.57 times / customer / year. According to the standards of WCS (World Class Service) & WCC (World Class Company), namely PT. PLN (Persero) the value of SAIDI for GDO.2 feeders is categorized as less reliable because it exceeds the maximum limit with a value of 1.75 hours / time / customer