Partial Discharge Detection in Gas Insulation Load Breaker Switch
This paper aims to discuss the measurement and recognition of partial discharge (PD) signals in gas insulation load breaker switch (GILBS) by using high frequency current transformer (HFCT) and acoustic emission (AE) sensors.Three kinds of fault were made purposely within the GILBS that sealed up with SF6 gas.Then we increase the voltage onto the GILBS until it produce PDs and measure the signals with HFCT and AE sensors.If PD occurs inside the solid insulators, the phase of the electrical signals detected by HFCT, compared with the 60-Hz power line, will locate in 0°~90° and 180°~270°.If there were aluminum screenings and knobs inside the GILBS or tips on the high voltage side, the signals detected will occur between 90° and 270° due to the discharge in SF6 gas.Because the discharge occurs at the end of the high voltage side, the electrical signals of the negative half cycles measured by HFCT are larger than those of the positive half cycles.According to the arrival time difference between HFCT sensors measuring and AE sensors measuring, the discharge place can be identified.By comparing with the electricity magnitude measured from the electrical signals, the discharges generate 30 pC (picocoulomb) or so.This detection method can also be applied to the online measurement of gas insulation switchgear (GIS).
Gas insulation load breaker switch (GILBS) Partial discharge (PD) High frequency current transformer (HFCT) Acoustic emission (AE) Gas insulation switchgear (GIS)
Chien-Yi Chen Yu-Hsun Lin Ching-Chau Su Ju-Chu Hsieh Cheng-Chi Tai
Department of Electrical Engineering,National Cheng Kung University,1 University Road,Tainan City 70 Department of Electrical Engineering,Nan Jeon Institute of Technolog,178 Chaoqin Road,Yanshui Dist.,
国际会议
成都
英文
1-4
2011-11-01（万方平台首次上网日期，不代表论文的发表时间）