A New Approach to On-Line Monitoring Device for ZnO Surge Arresters

  • Lee Bok-Hee (Research Center for Next-generation High Voltage and Power Technology, School of Electrical Engineering, Inha University) ;
  • Gil Hyoung-Jun (Dept. of Electrical Engineering, Inha University) ;
  • Kang Sung-Man (Dept. of Electrical Engineering, Inha University)
  • 발행 : 2005.06.01

초록

This paper describes a new approach to the algorithm and fundamental characteristics of the device for monitoring the leakage currents flowing through zinc oxide (ZnO) surge arresters. In order to obtain a technique for a new on-line monitoring device that can be used in the deterioration diagnosis of ZnO surge arresters, the new algorithm and on-line leakage current detection device for extracting the resistive and capacitive currents using the phase shift addition method were proposed. The computer-based on-line monitoring device can sense accurately the power frequency leakage currents flowing through ZnO surge arresters. The on-line leakage current monitoring device of ZnO surge arresters proposed in this work has the high sensitivity compared to the third harmonic leakage current detection devices. As a consequence, it was found that the proposed leakage current monitoring device would be useful for forecasting the defects and degradation of ZnO surge arresters.

키워드

참고문헌

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  12. Bok-Hee Lee and Sung-Man Kang, 'A new on-line leakage current monitoring system of ZnO Surge Arresters' Materials Science and Engineering B, accepted for publication on Dec. 2004