Title :
Propagation characteristics of UHF electromagnetic waves induced by partial discharge in GIS
Author :
Wang, Jiansheng ; Qiu, Yuchang ; Xianghua Wut ; Sun, Xiaobin
Author_Institution :
Xi´´an High Voltage Apparatus Res. Inst., China
Abstract :
The principle of the UHF method to detect partial discharge (PD) in GIS is to measure the UHF electromagnetic waves (EMWs) excited by PD pulses. Such EMWs propagate along the GIS busbar in not only TEM modes, but also of TE and TM modes. The coaxial busbar of the GIS acts as a waveguide in which the UHF EMWs travel. The PD source can be located accurately by this method. Experimental results show that single PD pulse can result in resonances of EMWs inside the GIS which are of much longer duration compared with the pulse width itself. In addition, the attenuation of the EMWs along the GIS busbar are investigated on a GIS test setup in laboratory
Keywords :
UHF measurement; UHF radio propagation; busbars; gas insulated substations; insulation testing; partial discharge measurement; resonance; GIS busbar; TE modes; TEM modes; TM modes; UHF electromagnetic waves; coaxial busbar; coaxial line; gas-insulated substation; partial discharge; propagation characteristics; single PD pulse; wave attenuation; wave resonances; Electromagnetic measurements; Electromagnetic propagation; Electromagnetic scattering; Geographic Information Systems; Partial discharge measurement; Partial discharges; Pulse measurements; Space vector pulse width modulation; UHF measurements; UHF propagation;
Conference_Titel :
Electrical Insulation, 2000. Conference Record of the 2000 IEEE International Symposium on
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-5931-3
DOI :
10.1109/ELINSL.2000.845514
