The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Measurement of the Propagation Constant of a Power Cable Using a Two-Port Time-Domain Reflectometry Technique

Two-Port Time Domain Reflectometry 방법을 이용한 XLPE 전력용 케이블의 전파 특성 측정

  • Shin, Dong Sik (Department of Electrical Engineering, Pohang University of Science and Technology) ;
  • Cho, Hyeon Dong (Department of Electrical Engineering, Pohang University of Science and Technology) ;
  • Park, Wee Sang (Department of Electrical Engineering, Pohang University of Science and Technology) ;
  • Yi, Sang-Hwa (Korea Electrotechnology Research Institute) ;
  • Sun, Jong-Ho (Korea Electrotechnology Research Institute)
  • 신동식 (포항공과대학교 전자전기공학과) ;
  • 조현동 (포항공과대학교 전자전기공학과) ;
  • 박위상 (포항공과대학교 전자전기공학과) ;
  • 이상화 (한국전기연구원) ;
  • 선종호 (한국전기연구원)
  • Received : 2012.11.30
  • Accepted : 2013.01.25
  • Published : 2013.03.31
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Abstract

This paper presents a two-port time-domain reflectometry(TDR) measurement technique for extracting the complex propagation constant of a cross-linked polyethylene(XLPE) cable. For the extraction, a short pulse transmitted through the cable is measured in the time domain and analyzed in the frequency domain. The propagation constant of a 22.9 kV XLPE cable with a conductor area of 325 $mm^2$ is extracted up to a frequency of approximately 2.14 GHz. The $S_{21}$ measured using a network analyzer and the two-port TDR technique are compared for verification. As a result compared with previous TDR method, the upper possible frequency limit for extracting the propagation constant increases and the measurement error decreases.

본 논문에서는 전력 케이블의 전파상수를 추출하는 2-port time-domain reflectometry(TDR) 방법을 제안한다. 케이블을 투과하는 펄스 신호를 시간 영역에서 측정하고 주파수 영역에서 분석하여 전파상수를 추출하였다. 22.9 kV 325 $mm^2$ XLPE 케이블의 전파상수를 2.14 GHz까지 추출하고 network analyzer 로 측정한 케이블의 $S_{21}$을 비교하여 2-port TDR 방법의 타당성을 입증하였다. 그 결과, 기존의 TDR 방법보다 측정 가능한 상한 주파수가 증가하고, 고주파수에서 오차가 줄어드는 것을 확인하였다.

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References

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