한국전기전자재료학회:학술대회논문집 (Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference)
- 한국전기전자재료학회 2005년도 추계학술대회 논문집 Vol.18
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- Pages.142-144
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- 2005
초고압 전력케이블용 중간 접속부 내의 부분방전신호 검출을 위한 박전극 응용
The Application of Al-foil Electrode for Detecting Partial Discharge Signal in Middle Joint Box of EHV Power Cable
- Lee, Yong-Sung (Wonkwang University) ;
- Yang, Jong-Kyung (Wonkwang University) ;
- Yang, Jong-Keok (Wonkwang University) ;
- Choi, Yong-Sung (Wonkwang University) ;
- Park, Dae-Hee (Wonkwang University)
- 발행 : 2005.11.10
초록
To detect partial discharge of 154kV joint box, we have made experiment by using the Al-foil electrode sensor. Generally the signals which are detected in partial discharge test of underground power transmission cable are accompanied wi th both noises of high voltage and noises of surrounding power cable. The most noise in near to end part of joint box is corona, beside other noises flowed from surrounding area. Partial discharge test is difficulty due to these noises. First, we had used Al-Foi1 sensor on middle joint box of 154[kV] underground transmission power cable, and then analyzed reliability of calibration signal by using the Al-Foi1 electrode sensor of NJB. From above results, decrement properties measured highly. But incase of injecting calibration signal of 500[pC] after measuring signals in IJB, the S/N ratio had about 25[dB] acquisition.