Title :
Development of detection and diagnostic techniques for partial discharges in GIS
Author :
Oyama, M. ; Hanai, E. ; Aoyagi, H. ; Murase, H. ; Ohshima, I. ; Menju, S.
Author_Institution :
Toshiba Corp., Kawasaki, Japan
fDate :
4/1/1994 12:00:00 AM
Abstract :
This paper describes detection and diagnostic techniques for partial discharges in gas insulated substations (GIS). Partial-discharge current waveforms of SF6 gas and external noise characteristics of actual substations were investigated, and a measuring system having sensors in GIS and employing frequency range of VHF band was developed. By this system, detecting very small partial discharges of several 10 pC level has become possible. Also, a neural network system, focusing attention as a method for recognizing patterns, was applied for determining causes for partial discharge in GIS, and its applicability has been proved
Keywords :
charge measurement; electric current measurement; gaseous insulation; neural nets; partial discharges; power engineering computing; substations; sulphur compounds; GIS; SF6; SF6 gas; VHF band; detection techniques; diagnostic techniques; external noise characteristics; gas insulated substations; neural network system; partial discharges; partial-discharge current waveforms; pattern recognition; Current measurement; Frequency measurement; Gas detectors; Gas insulation; Geographic Information Systems; Noise measurement; Partial discharge measurement; Partial discharges; Sensor phenomena and characterization; Substations;
Journal_Title :
Power Delivery, IEEE Transactions on
