Partial discharge diagnosis of Gas Insulated Station (GIS) using acoustic method

This document recently, gas insulated switchgear (GIS) is widely used in electrical system. This is due to the fact that GIS has many advantages compared with other types of switchgear, like more efficient space for installation and better protection from pollution. However, GIS is still vulnerable to operation malfunction and even breakdown caused by defects within it. One of the methods to assess GIS insulation condition is by diagnosing partial discharges that occur within GIS which caused by the aforementioned defect.This final project reports the presence of partial discharges in the GIS compartments which have decomposition level above CIGRE standard of 1000 ppm using acoustic emission method. Based on the PD measurement result, insulation condition of GIS was investigated. This diagnosis were done in Gunung Salak substation. From this research it is known that possible source of defect within GIS such as protrusion, free particle, or loose shields, can be detected using acoustic emission method.