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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On Line Partial Discharge Measurement Method for Transformer

온라인 변압기 부분방전 측정기법

  • 권동진 (한전 전력연구원 전력계통연구실) ;
  • 최인혁 (한전 전력연구원 전력계통연구실) ;
  • 송일근 (한전 전력연구원 전력계통연구실) ;
  • 박재준 (중부대학교 정보공학부)
  • Published : 2001.05.11
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Abstract

This paper describes an application of the on line partial discharge measurement method in operating transformer. In the operating transformer, the partial discharge signal may be superimposed by radio intereference voltage(RIV) and pulse shaped noise signals generated by external corona. The partial discharge quantity showed about 3,800pC due to very high sinusoidal interferences at the measuring impedance terminal of the transformer bushing tap. In order to reject these noises, this paper applied RIV filter, band-pass filters and noise gating method. The resulting measuring sensitivity was improved from 3,800pC to 160pC.

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