电工技术学报2017，Vol.32Issue(13)：248-254,270,8.DOI:10.19595/j.cnki.1000-6753.tces.151720
盐雾条件下染污绝缘子交流污闪特性
AC Pollution Flashover Characteristics of Polluted Insulatorsunder Salt Fog Conditions
摘要
Abstract
The surface pollution of polluted insulators absorbs fog water and damps in the salt fog. Meanwhile, the salt in the salt fog deposits on insulators surface, which increases the surface conductivity and degrades the flashover performance of insulators. Insulators may flashover under lower voltage level even under operating voltage. This will threaten the safe and stable operation of the power grid. In this paper, experiments on three typical insulators, i.e. porcelain, glass and composite insulators, were conducted in different salt deposit densities (SDD) and fog water conductivities (γ20). The concept of additional salt deposit density (ASDD) was proposed to analyze the relationship among ASDD, SDD and fog water conductivity. The test results show that the ac flashover voltage decreases with the increases of both SDD and fog water conductivity, which has a negative exponential relationship with SDD while a linear relationship with fog water conductivity. The ASDD can be applied to analyze the combined effects of SDD and fog water conductivity. The relation between the fog flashover voltage and SDD and ASDD is a negative power exponent. The fog flashover can be treated as a special kind of pollution flashover.关键词
雾水电导率/附加盐密/污染/交流闪络特性/盐雾Key words
Fog water conductivity/additional salt deposit density/pollution/AC flashover characteristics/salt fog分类
信息技术与安全科学引用本文复制引用
郭裕钧,蒋兴良,孟志高,李源军,高标..盐雾条件下染污绝缘子交流污闪特性[J].电工技术学报,2017,32(13):248-254,270,8.基金项目
国家重点基础研究发展计划(973计划)(2014CB260401),输配电装备及系统安全与新技术国家重点实验室自主重点项目(2007DA10512714101)和国家创新研究群体基金(51021005)资助. （973计划）
