Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Partial Discharge Measurement by a Capacitive Voltage Probe in a Gas Insulated Switch

가스절연개폐기에서 용량성 전압프로브를 이용한 부분방전 측정

  • 최수연 (한국해양대학교 전기전자공학부) ;
  • 박찬용 (한국해양대학교 전기전자공학부) ;
  • 박대원 (한국해양대학교 전기전자공학부) ;
  • 김일권 (한국해양대학교 전기전자공학부) ;
  • 길경석 (한국해양대학교 전기전자공학부)
  • Published : 2007.11.01
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Abstract

This paper described the partial discharge (PD) measurement techniques for diagnosing gas-insulated switches in overhead power distribution system. A capacitive voltage probe to detect PD pulse was designed and fixed on the surface of a bushing. We also designed a coupling network to attenuate AC voltage by 270 dB, and a low-noise amplifier having the gain of 40 dB and 500 kHz~20 MHz 3 dB. From the calibration, it was calculated that the sensitivity of the measurement system was 0.94mV/pC. In the application experiment, we could measure a PD pulse of 45 pC.

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