Studi Keandalan Sistem Distribusi 20 Kv Berbasis GIS ( Geographic Information System ) Dengan Menggunakan Metode RIA ( Reliability Index Assessment )

Pada suatu sistem distribusi tenaga listrik, tingkat keandalan adalah hal yang sangat penting dalam menentukan kinerja sistem tersebut. Keandalan ini dapat dilihat dari sejauh mana suplai tenaga listrik bisa mensuplai secara kontinyu dalam setahun ke konsumen. Keandalan sangat berpengaruh dalam suatu kualitas jaringan distribusi yang dapat beroperasi sesuai dengan fungsi dalam rentang waktu dan kondisi tertentu. Kemudian keandalan ini diterapkan pada GIS ( Geographic Information System ) sebagai tool yang digunakan untuk mempermudah pekerjaan manusia dalam memonitoring keandalan suatu system distribusi. Indeks – indeks yang digunakan dalam menentukan suatu keandalan adalah SAIFI (System Average Interruption Frequency Indeks), SAIDI (System Average Interrruption Duration Index), dan CAIDI (Customer Average Interruption Duration Index). Metode RIA (Reliability Index Assessment). Metode RIA ini mendata kegagalan yang terjdai pada peralatan secara komprehensif, kemudian mengindetifikasi kegagalan, dan menganalisis mode kegagalan tersebut. Hasil GIS pada kondisi perfect switching diketahui nilai parameter keandalan SAIDI = 1.718 jam/pelanggan/tahun, SAIFI = 5.514 kali/pelanggan/tahun, dan CAIDI = 3.00 jam/gangguan/pelanggan,sedangkn pada kondisi imperfect switching didapat SAIDI = 135.3 jam/pelanggan/tahun, SAIFI = 20.17 kali/pelanggan/tahun, dan CAIDI = 6.71 jam/gangguan/pelanggan. Serta MAIFI keseluruhan sistem = 1.842 gangguan/tahun. ================================================================================================================== At a distribution system electricity, the reliability is importance in determining the performance of the system. The reliability can be seen from the extent to which electric power supply can supply continuously in a year to consumers. Reliability is very influential in a quality distribution network that can operate in accordance with the functions in a span and certain conditions. Then this reliability applied to GIS ( Geographic Information System ) as the tool used to facilitate the work of man in a distribution system reliability supervisory. Index-index used in determining a the reliability of is SAIFI (System Average Interruption Frequency Indeks), SAIDI (System Average Interrruption Duration Index), and CAIDI (Customer Average Interruption Duration Index). RIA Method (Reliability Index Assessment) is an approach used to predict the failure of distribution system based on the system topology and data-data about the component reliability. This RIA method logs a failure on equipment comprehensively, then to identified failure, and analyzing the failure mode. And calculation result of GIS in perfect switching condition in SAIDI = 1.718 hour/fault/load point, SAIFI = 5.514 times/load point/year, and CAIDI = 3.00 hour/fault/load point, whereas in imperfect switching condition gets SAIDI = 135.3 hour/fault/load point, SAIFI = 20.17 times/load point/year, CAIDI = 6.71 hour/fault/load point. As soon as MAIFI for all system = 1.842 fault/year