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Localization of Concentric Neutrals Corrosion on Live Underground Power Cable Based on Time-frequency Domain Reflectometry

시간-주파수 영역 반사파 계측법 기반 활선 상태 지중 전력 케이블의 중성선 결함 위치 추정 연구

  • Lee, Chun Ku (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Yoon, Tae Sung (Department of Electrical Engineering, Changwon National University) ;
  • Park, Jin Bae (Department of Electrical and Electronic Engineering, Yonsei University)
  • Received : 2012.10.02
  • Accepted : 2013.01.18
  • Published : 2013.02.01

Abstract

In this paper, we propose a time-frequency domain reflectometry (TFDR) based measurement method for localizing concentric neutrals corrosion on live underground power cable. It consists of two inductive couplers which can transmit the reference signal into live underground power cable and measure the reflected signals from the impedance discontinuities of concentric neutrals corrosion. In order to compensate the dispersion of the measured reflected signal via inductive coupler, an equalizer based on Wiener filtering is designed. To improve the localizing performance of concentric neutrals corrosion in the vicinity of the measurement point, the reference signal is removed from the measured reflected signals. The localization performance of the proposed method is verified by the concentric neutrals corrosion localization experiment.

Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)

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