架空输电线路绝缘子在典型鸟粪污染条件下的闪络特性

Flashover Performance of Insulator for Overhead Transmission Line Under Typical Bird Contamination Conditions

为研究架空输电线路绝缘子在鸟粪污染条件下的闪络特性,根据现场绝缘子串受鸟粪污染的典型形态和参数,提出了绝缘子串鸟粪类污秽试验的涂污形式,并考虑不同环境污秽程度,开展了110 kV、220 kV绝缘子串附加鸟粪模拟液的人工污秽试验,给出了不同条件下鸟粪污染绝缘子串的闪络电压。分析得出：在环境污秽度较轻的地区,110 kV线路采用9片普通型绝缘子串,220 kV线路采用15片普通型绝缘子串,均不会因鸟粪污染绝缘子表面导致污闪。试验结果为涉鸟故障原因分析和防治措施的选择提供了参考。

To study the flashover performance of insulator for overhead transmission line under typical bird contamination conditions, we put forward an artificial contaminating method to simulate the insulator contamination of bird excretion based on the typical morphology and parameters of contaminated insulator string. Artificial pollution tests were carried out to investigate the insulator string of 110 kV and 220 kV AC transmission lines with additional bird con-tamination stimulant liquid considering the different environmental pollution levels. The tests show, under the different flashover voltages and variant contaminated conditions and in the regions of slight pollution, contaminant flashover will not occur for the string of 9 discs used in 110 kV AC transmission line and the string of 15 discs used in 220 kV AC transmission line. Those results of tests provide references for the analysis of bird-related outage and the selection of prevention measures.