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http://dx.doi.org/10.5762/KAIS.2011.12.11.5123

The measurement of the half period modulated pulse on earth for detection of a underground electric leakage point  

Kim, Jae-Hyun (Electrical Safety Research Institute of KESCO)
Jeon, Jeong-Chay (Electrical Safety Research Institute of KESCO)
Yoo, Jae-Geun (Electrical Safety Research Institute of KESCO)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.12, no.11, 2011 , pp. 5123-5127 More about this Journal
Abstract
Research and development for the technology, that is about maintenance and accidents prevention of underground power distribution line, are demanding. The precise detection of leakage point of underground power line is very important, because it is difficult to detect the exact location of a fault in underground power line and to repair faults. When earth electric potential is measured to detect underground electric leakage point after transmitting AC electric pulse wave to underground power line, it must be measured in a specific half period of AC pulse wave because the distribution of the electric earth potential varies with the polarity of the transmitted wave. In this paper we proposed the measurement of half period modulated earth potential as a method to detect a underground leakage point. And We compared the proposed method with other methods. Through experiments we verified that the proposed method can be implemented and operated properly.
Keywords
Electric Leakage; Underground Power Line; Phase Inversion; Earth potential;
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