Reliability of 6 Feeder Electrical Distribution PT. PLN ULP Gunungsitoli

PT PLN (Persero) ULP Gunungsitoli is responsible for ensuring a reliable and continuous electricity supply to customers in the Nias area. Frequent disruptions and power outages in the form of system equipment operating failures and natural disasters, especially at the 6 feeders at ULP Gunungsitoli, create a negative impact on community activities, businesses, and public services. In order to reduce this impact, it is necessary to optimize the system using a study in the form of analysis using the Failure Mode and Effect Analysis (FMEA) method, which is a form of approach aimed at identifying failure modes, causes of failure and the impact of failure. The reliability value of each feeder obtained in the distribution network of PT. PLN ULP Gunungsitoli, the feeder with the lowest level of reliability is the GMW feeder.02 SAIFI=0.6857 and SAIDI = 26.529, the feeder with the highest level of reliability is the GST feeder.02 SAIFI=0.3209 and SAIDI =9.3942. After optimizing the sectionalizer on feeders with a low level of reliability, an increase in reliability was obtained, namely: for SAIFI it reached 45% and SAIDI reached 33%. The level of reliability of the distribution network at the three feeders of PT. PLN ULP Gunungsitoli meets SPLN.