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Characteristics of Leakage Current on Transmission Insulators Contaminated Artificially with Soluble and Nonsoluble Materials  

최인혁 (한전 전력연구원)
최장현 (한전 전력연구)
이동일 (한전 전력연구)
김찬영 (우석대학교 전기전자공학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers C / v.53, no.9, 2004 , pp. 464-469 More about this Journal
Abstract
The leakage current of transmission insulators contaminated with salt, clay, and kaolin was examined in the Gochang's Long Periods Testing Center. The Insulators were artificially contaminated and estimated with the method of equivalent salt deposit density(ESDD). The artificially contaminated insulators were installed with the same condition as in the real transmission power line and applied with 154 (kV). The leakage current of the artificially contaminated insulators was measured with environment conditions, such as temperature and humidity by the a automatic leakage current detecting system. The leakage current of heavily contaminated insulator was abruptly increased above 72［%］ of humidity, even though the leakage current was similar between the contaminated and non-contaminated insulators below 72［%］ of humidity. Also, it was found that the humidity was much more important than the temperature in the leakage current of transmission insulators. The leakage current of contaminated insulator was decreased when it was plenty of rainfall, resulting from natural washing.
Keywords
Artificial Contamination; Porcelain Insulators; Leakage Current; ESDD;
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