1000kV输电线路污秽绝缘配置的初步探讨  

The Research on 1 000kV Transmission Lines Polluted Insulation

作　　者：吴光亚[1] 蔡炜[1] 张锐[1] 徐涛[1] 

机构地区：[1]武汉高压研究所,湖北武汉430074

出　　处：《电瓷避雷器》2005年第6期1-5,9,共6页Insulators and Surge Arresters

摘　　要：1990年和2001年大面积污闪事故基本上发生在Ⅱ～Ⅲ级,笔者认为,发生污闪的根本原因是输电线路外绝缘配置总体水平不足。建议在1000kV输变电工程中,采用300kN普通型绝缘子双联悬垂串,其片数、串长和爬电距离在Ⅰ级(盐密为0.03mg/cm2)下,分别为50片、9750mm和25250mm;在Ⅱ级(盐密为0.06mg/cm2)下,分别为60片、11700mm和30300mm;在Ⅲ级(盐密为0.10mg/cm2)下,分别为67片、13 065mm和33 835mm;建议1000kV输变电工程Ⅱ级及以上采用的复合绝缘子,其结构高度和爬电距离取瓷绝缘子的80%,即Ⅱ级结构高度为9750mm,爬电距离为25250mm,Ⅲ级结构高度为10452mm,爬电距离为27 068mm。The base cause of pollution flashover accident which happened in wide area in 1990 and 2001 is insufficient external insulating level for transmission lines. The double insulator string consisting of 300kN standard insulator was advised to be used on 1 000kV transmission line. The string unit amount, spacing and creepage distance is 50 units, 9 750mm and 25 250mm in pollution class Ⅰ （ESDD of 0.03mg/cm^2）,60 units, 11 700mm and 30 300mm in pollution class Ⅱ （ESDD of 0.06mg/cm^2）, 67 units, 13 065mm and 33 835mm in pollution class Ⅲ（ESDD of 0.10mg/cm^2）. The composite insulators are suggested to be used in pollution class Ⅱ and above, and the composite insulators height and creepage distance is 80% of that of cap and pin insulator, namely the height and creepage distance is 9 750mm and 25 250mm in pollution class Ⅱ, and is 10 452mm and 27 068mm in pollution class m.

关 键 词：1 000kV输电线路 污秽绝缘 外绝缘配置 

分 类 号：TM85[电气工程—高电压与绝缘技术]