Wavelet Transform Based Time-Frequency Domain Reflectometry for Underground Power Cable

지중 전력 케이블에 대한 웨이블릿 변환 기반 시간-주파수 영역 반사파 계측법 개발

  • Received : 2011.09.23
  • Accepted : 2011.11.01
  • Published : 2011.12.01


In this paper, we develope a wavelet transform based time-frequency domain reflectometry (WTFDR) for the fault localization of underground power cable. The conventional TFDR (CTFDR) is more accurate than other reflectometries to localize the cable fault. However, the CTFDR has some weak points such as long computation time and hard implementation because of the nonlinearity of the Wigner-Ville distribution used in the CTFDR. To solve the problem, we use the complex wavelet transform (CWT) because the CWT has the linearity and the reference signal in the TFDR has a complex form. To confirm the effectiveness and accuracy of the proposed method, the actual experiments are carried out for various fault types of the underground power cable.


Fault localization;Time-frequency domain reflectometry;Complex wavelet transform;Underground cable


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Supported by : 한국에너지 기술평가원(KETEP)