Through using ultrahigh-frequency partial discharge(PD) online-monitoring system of GIS
the PD signal was found in the compartment of Xiugao No.1 line of 110 kV GIS in 110 kV Gaoxin substation.The live partial discharge detection and location of GIS
as well as uncovering check
were conducted
and the PD source was found at A-phase cable terminal joint of Xiugao No.1 line of 110 kV GIS in 110 kV Gaoxin substation.By replacing the A-phase cable terminal joint
the PD signal disappeared
and a possible accident was hence avoided
which demonstrates that the method of ultra high frequency partial discharge(PD) online-monitoring system of GIS is effective in detecting the fault of cable terminal joint in GIS.