Performance of non-ceramic insulators in tropical environments

被引：0
|
作者：
Fernando, M.A.R.Manjula [1 ]
机构：
[1] Chalmers Univ of Technology, Goteborg, Sweden
来源：
Doktorsavhandlingar vid Chalmers Tekniska Hogskola | 1999年 / 1544期
关键词：
Contamination - Flashover - Hydrophobicity - Leakage currents - Mathematical models - Neural networks - Waveform analysis;
D O I：
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中图分类号：
学科分类号：
摘要：
Parallel laboratory tests were carried out on insulators to develop a method of evaluating insulator performance. A leakage current data acquisition system was developed. Leakage current waveforms were measured on naturally and artificially contaminated material samples. A nonlinear behavior of leakage current was observed. It was found that this nonlinearity was caused by the formation of dry band on hydrophilic surfaces in the presence of contamination. Its relation to surface hydrophobicity and electric stress was described. Nonlinear leakage currents were modeled by RC components characterizing a polluted surface.
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页码：1 / 140
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