한국전기전자재료학회논문지 (Journal of the Korean Institute of Electrical and Electronic Material Engineers)

  • 제26권4호
  • /
  • Pages.309-314
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  • 2013
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  • 1226-7945(pISSN)
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  • 2288-3258(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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절연유중 부분방전 검출을 위한 안테나의 최적 설계

Optimal Design of an Antenna for the Detection of Partial Discharges in Insulation Oil

  • 이정윤 (이엠아이테크(주)) ;
  • 조향은 (한국해양대학교 전기전자공학부) ;
  • 박대원 (한국해양대학교 전기전자공학부) ;
  • 길경석 (한국해양대학교 전기전자공학부) ;
  • 오재근 (국립과학수사연구원)
  • Lee, Jung-Yoon (EMI Tech. Co. Ltd.) ;
  • Jo, Hyang-Eun (Division of Electrical and Electronics Engineering, Korea Maritime University) ;
  • Park, Dae-Won (Division of Electrical and Electronics Engineering, Korea Maritime University) ;
  • Kil, Gyung-Suk (Division of Electrical and Electronics Engineering, Korea Maritime University) ;
  • Oh, Jae-Geun (National Forensic Service)
  • 투고 : 2013.03.20
  • 심사 : 2013.03.24
  • 발행 : 2013.04.01
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초록

This paper dealt with the radiated electromagnetic wave detection of partial discharge (PD) in oil for insulation diagnostics of oil-immersed transformers. Three types of electrode system were fabricated to simulate the insulation defects that could occur in oil-immersed transformers. Frequency components of radiated electromagnetic wave in oil was measured by broadband bi-conical antennas of 300 MHz~2 GHz and a spectrum analyzer of 9 kHz~3 GHz. Frequency component of electromagnetic waves from PD in oil were highly distributed at 500 MHz. From the result, a narrow-band monopole antenna with the center frequency of 500 MHz was fabricated. We could detect PD signal in insulation oil without an influence of external noise by a measurement system which consists of the prototype monopole antenna, a LNA (Low Noise Amplifier), an oscilloscope and a spectrum analyzer.

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참고문헌

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