摘要
覆冰绝缘子的电气特性是绝缘子防冰闪措施研究的关键技术难题,国内外学者对此进行了大量试验、理论研究,取得了很多有价值的成果,但输电线路冰闪事故仍时常发生。因此,总结了国内外关于绝缘子覆冰闪络的研究进展,为国内外从事绝缘子防冰闪工作的研究人员提供参考。结合近80年国内外对绝缘子覆冰闪络及其防治方法的丰富科学研究经验,从覆冰绝缘子表面冰层的物理特性、覆冰绝缘子试验方法、覆冰闪络特性及其冰闪数学模型等方面系统地总结分析了覆冰绝缘子闪络的各种影响因素/机理。得出了覆冰类型、染污盐密、覆冰水电导率、覆冰程度、气压、电压类型等因素对绝缘子冰闪电压的影响规律。并提出了绝缘子覆冰闪络特性、机理及其冰闪数学预测模型等亟待研究的内容,对未来绝缘子覆冰闪络的研究提出了一些极具价值地建议和设想。
The electrical characteristics of ice-covered insulators is one of the key issues in developing anti-flashover measures for the insulators. Although there are many experiments and theoretical investigations of this issue worldwide, from which a lot of valuable results has been obtained, icing flashover accidents are still far from being prevented. There- fore, it is necessary to summarize these research results of flashovers on ice-covered insulator, so as to provide references for and guide further efforts on development of anti-flashover measures. On the basis of the rich experimental investiga- tions on icing flashover and anti-icing measures of insulators carried both at home and abroad in last eighty years, we systematically summarized and analyzed various factors and mechanisms that affect icing flashover from aspects includ- ing physical characteristics of icing surface, test methods, characteristics and mathematical models of icing flashovers, etc., and consequently presented the relations of the icing flashover voltage of insulators to icing type, salt density of con- tamination, conductivity of icing water, icing amount, pressure, type of applied voltage, etc. We also proposed some key topics, which covered icing flashover＇s mechanism and characteristics and its mathematical prediction models, as well as some suggestions and ideas, for future researches of icing flashovers on insulator.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2014年第2期317-335,共19页
High Voltage Engineering
基金
国家重点基础研究发展计划(973计划)(2009CB724502
2009CB724501)
国家创新研究群体基金(51021005)~~
关键词
覆冰
绝缘子
闪络特性
闪络模型
防治措施
研究进展
icing
insulator
flashover performance
flashover model
prevention measure
research and development
