Title :
Experience with Partial Discharge detection at high voltage Gas Insulated Switchgear by ultra high frequency (UHF) method
Author :
Chan, L.K. ; So, K.L. ; Chow, KIN KEE
Author_Institution :
CLP Power Hong Kong Ltd., Hong Kong, China
Abstract :
The paper reviews the experience of Partial Discharge (PD) detection at 400kV and 132kV Gas Insulated Switchgear (GIS) by UHF method. It outlines the principle of UHF signal emission from possible PD inside HV GIS and relevant detection methods applied. Two real cases with detected incipient fault modes at 400kV and 132kV GIS are being discussed. Moreover, the shortcoming of UHF detection at metallic shielded GIS is identified and feasible solving through detection points at non-metallic secondary wiring terminals of Current Transformer (CT) and Voltage Transformer (VT) is described.
Keywords :
current transformers; gas insulated switchgear; partial discharges; potential transformers; GIS; UHF detection; UHF signal emission; current transformer; gas insulated switchgear; nonmetallic secondary wiring terminals; partial discharge detection; voltage 132 kV; voltage 400 kV; voltage transformer; Couplers; Detectors; Gas insulation; Handheld computers; Partial discharges; Sensitivity; Wiring; Condition monitoring; Gas insulation; Highvoltage techniques; Partial discharges; Switchgear; UHF measurements;
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2013 IEEE PES Asia-Pacific
Conference_Location :
Kowloon
DOI :
10.1109/APPEEC.2013.6837317
