Load Performance Analysis of 630 kVA Mobile Substation Unit PGD067 Based on SAIDI and SAIFI Parameters

Abstract

Maintenance of electrical distribution substations is an effort to maintain reliability and stability of power distribution system. Maintenance activity is routine activity of PT. PLN (Persero) to minimize unpracticable damage in future. Conventional maintenance methods often lead to power outages particularly in UP3 Serpong area which can disrupt electrical transactions as measured by SAIDI and SAIFI indices. To reduce interruptions cause by these indices, a maintenance method utilizing MSU is implemented to achieve downtime of 0 hours/customer. Implementation of MSU was tested at PGD067 substation in 2023 resulting value of 0 hours/customer during maintenance period. PT. PLN sets targets of SAIDI 2.34 hours/year and SAIFI 1.98 times/year. In comparation, the SAIDI and SAIFI values in 2022 were 3.22 hours/customer/year and 2.8 times/customer/year following to 1.13 hours/customer/year and 1.2 times/customer/year.