Lightning characteristics and performance of distribution system around Jakarta

A real-time lightning location network started to operate in Indonesia in mid 1995 and began providing reliable data in the end of the same year. The network consists of 8 signal receiving stations and works using the time-of-arrival (TOA) technique. The present paper reports on lightning characteristics observed by the LPATS-III network for 5 consecutive years from 1996 to 2000 on the Java Island, Indonesia. Performance of the MV distribution system in Jakarta recorded for the same period is analyzed in relation to the lightning activity. Lightning activity on the Island shows a consistent high density. The spatial and temporal distribution of lightning activity on the Island as reported by Hidayat and Ishii are confirmed. OH line outages and temporary outages dominate the performance of MV distribution line in Jakarta. Both types of outage exhibit strong correlation with lightning activity. The performances of OH lines and cable for Jakarta distribution system are estimated to be 36.2 and 24.6 outages per 100 km per year, respectively.