电力勘测设计Issue(5)：19-24,56,7.DOI:10.13500/j.dlkcsj.issn1671-9913.2026.05.004
高海拔地区交流特高压线路绝缘配置研究
Research on Insulation Configuration of AC UHV Transmission Lines in High Altitude Areas
马江波 1谭浩文 1米凯 1周文武 1李小亭 1王子悦1
作者信息
- 1. 中国电力工程顾问集团西北电力设计院有限公司,陕西 西安 710075
- 折叠
摘要
Abstract
Investigation on the application status of composite insulators and disc insulators in existing ac uhv line projects in China,and analyzing the configuration principles and applicable scope of insulator strings in low altitude regions.Relying on the research results and practical experience of the Sichuan Chongqing AC UHV Project under construction,it is believed that the structural height of composite insulators in high altitude areas is controlled by the switching overvoltage gap,and the insulation coordination method is to match the tower head with the dry arcing distance after stringing.Based on the results of the pollution outer insulation test conducted by CEPRI,the recommended structural height and minimum creepage distance of composite insulators in high-altitude areas are obtained.Analyzing the altitude correction formula for the number of insulator pieces and pollution withstand voltage in existing standard specifications,the results show that the correction method in GB 50665-2011 has not undergone altitude iteration,and the correction coefficient for the number of insulator pieces is a fixed value.The correction coefficient for the number of insulator pieces obtained by the correction method in DL/T 368-2010 increases with the increase of the characteristic index of air pressure influence and altitude.Recent scientific research findings from ongoing AC UHV projects indicate that the correction coefficient for the number of three-umbrella insulator units is positively correlated with altitude,whereas for bell-type insulators it exhibits an abnormal sharp increase at altitudes of 2 000 m～3 000 m.At the same altitude,the correction coefficient is higher for class c pollution severity than for class d,and higher for bell-type insulators than for three-umbrella insulators.关键词
交流特高压/高海拔修正/绝缘配置/污耐压Key words
AC UHV/high altitude correction/insulation configuration/pollution withstand voltage分类
信息技术与安全科学引用本文复制引用
马江波,谭浩文,米凯,周文武,李小亭,王子悦..高海拔地区交流特高压线路绝缘配置研究[J].电力勘测设计,2026,(5):19-24,56,7.
