Lightning Activity Evaluation in South Sumatera Region

An automated system for lightning localization has been developed in many industries especially in electricity company. Lightning detection system output can be used as a guide to improve transmission and distribution lines performance and to identify electrical failure in power system network. By using combined method, magnetic directional finding (MDF) and time of arrival (ToA), lightning strike location point can be determined. Lightning detection system in Indonesia can provides map of lightning density, level of vulnerability of lightning exposure to transmission lines, and help to evaluate lightning relationship to transmission fault/disturbance. Lightning mapping in South Sumatera region was presented in this paper. According to the recorded data from July 2018 toward October 2018, there were 58.612 lightning activity which consist of 88.71% negative cloud to ground. Negative cloud to ground lightning mostly ranged within 20 kA to 24.9 kA, while positive cloud to ground lightning mostly ranged within 25 kA to 29.9 kA. The lightning density in South Sumatera is range from 0.1 to 3 lightning/km
²
/month. Lightning exposure on 150 kV transmission line and transmission line evaluation using lightning data was presented on this paper to show the benefit of lightning detection system.