The Anomaly Power Transmission and Analysis at a 500kV GIS Substation

Abstract

In view of the extension which steps up from 220kV to 500kV at the switching station, induced the flashover of insulation spacer in gas chamber from 500kV line side, the voltage fault of 500kV bus, the discharge of junction which between oil-gas casing of 500kV main transformer from 220kV bus side and GIS branch bus, due to improper installation. The paper analyzes connection diagram, graph of fault recorder and repair with disassembly point for point. It also suggests the recommendations for improvement, to avoid the appearance.