Proceedings of the KSR Conference (한국철도학회:학술대회논문집)

The Korean Society for Railway (한국철도학회)
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A Study on the measurement and Method of Partial Discharge in High Voltage CV Cable

고압 CV 케이블에서의 부분방전 측정과 위치검출 방법에 관한 연구

  • 송재용 (한국해양대학교 전기전자공학부) ;
  • 서황동 (한국해양대학교 전기전자공학부) ;
  • 박대원 (한국해양대학교 전기전자공학부) ;
  • 길경석 (한국해양대학교 전기전자공학부) ;
  • 한문섭 (한국철도기술연구원) ;
  • 장동욱 (한국철도기술연구원)
  • Published : 2005.05.01

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Abstract

This paper describes the measurement and location method of partial discharges in high voltage CV cables. Coupling capacitors were used to detect partial discharge signal. Impedance characteristic of the coupling circuit and an amplifier with a high Common Mode Rejection Ratio(CMRR) were studied to improve sensitivity of the circuit. From the calibration experiment, the sensitivity of the partial discharge detection circuit was about 100pC. Also, we confirmed that the location of partial discharges in cables can be estimated by calculation of time difference between the first pulse and the second one reflected from the other end of the cable.

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