摘要
基于人工覆冰试验,给出了长串直流绝缘子的覆冰闪络特性。研究结果表明,直流绝缘子串的覆冰闪络电压与串长呈非线性,根据试验结果提出了冰闪电压随串长变化的经验公式;并进行了不同类型绝缘子的直流冰闪电压对比试验,包括钟罩型、三伞型、双伞型和复合绝缘子,在严重覆冰条件下,不同伞型绝缘子的冰闪电压很接近。最后给出了覆冰区的绝缘子设计串长及防冰闪措施。
Based on the data of artificial icing test for insulators, the DC flashover performance of ice-coated long insulator strings is presented. Research results show that the DC flashover voltage of insulator strings is nonlinear with respect to strings length. According to test results an experimental formula of ice-coated insulators＇ flashover voltage varying with string length is put forward; and comparative tests of DC icing flashover voltages for different kinds of insulators, including three-shed types of insulators DC anti-fog, double-shed and as well as composite insulators are carried out, under serious icing condition the icing flashover voltages of different shed types of insulators are very close. The string length of insulators designed for ice-coated area of HVDC transmission lines and the measures to prevent the icing flashover are given.
出处
《电网技术》
EI
CSCD
北大核心
2006年第17期74-78,共5页
Power System Technology
关键词
高压直流输电线路
覆冰
绝缘子串
冰闪电压
高电压与绝缘技术
HVDC transmission line
icing
insulator string
icing flashover voltage
high voltage and insulation technology
