Title :
Sensitivity of UHF coupler and loop electrode with UHF method and their comparison for detecting partial discharge in GIS
Author :
Hoshino, T. ; Maruyama, S. ; Sakakibara, T. ; Ohtsuka, S. ; Hikita, M. ; Ueta, G. ; Okabe, S.
Author_Institution :
Toshiba Corp., Kawasaki
Abstract :
We introduce in this paper the sensitivity of two UHF couplers, disc-type measuring electrode and loop-type measuring electrode embedded in an epoxy insulator, for detecting partial discharge (PD) and diagnosing GIS. Each of the couplers has sufficient performance for detecting the electromagnetic waves up to 8 GHz. The attenuation characteristic of electromagnetic waves is changed depending upon the location of defects, such as a particle on an enclosure or on a conductor.
Keywords :
UHF couplers; electrodes; electromagnetic waves; epoxy insulation; fault diagnosis; gas insulated switchgear; partial discharge measurement; GIS; UHF coupler; attenuation characteristic; conductor; electromagnetic waves; enclosure; loop electrode; partial discharge; Attenuation; Electrodes; Electromagnetic coupling; Electromagnetic measurements; Electromagnetic scattering; Geographic Information Systems; Insulation; Partial discharge measurement; Partial discharges; UHF measurements; Disc-type & Loop-type measuring electrodes; Gas-Insulated Switchgear; Partial discharge; UHF Method;
Conference_Titel :
Condition Monitoring and Diagnosis, 2008. CMD 2008. International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-1621-9
Electronic_ISBN :
978-1-4244-1622-6
DOI :
10.1109/CMD.2008.4580299
