输电线路覆冰拆地线后避雷器选型问题研究  

Selection of Lightning Surge Arrester in the Event of Removing Ground Wires From Iced Transmission Line

作　　者：邹建章 张宇 胡京 张敦晶 周龙武 ZOU Jianzhang;ZHNG Yu;HU Jing;ZHANG Dunjing;ZHOU Longwu(Electric Power Research Institute,Jiangxi Electric Power Company of State Grid,Nanchang 330096,China;Nanchang University,Nanchang 330031,China)

机构地区：[1]国网江西省电力有限公司电力科学研究院,南昌330096 [2]南昌大学,南昌330031

出　　处：《电瓷避雷器》2022年第3期26-31,41,共7页Insulators and Surge Arresters

基　　金：国网江西省电力有限公司科技项目(编号:521820180013)。

摘　　要：地线覆冰是导致输电线路冰害故障的重要原因之一,在特殊区段,可将拆除地线作为防冰措施。拆除地线对线路防雷性能产生直接影响,为保证线路应有的防雷水平,建议加装线路避雷器。无地线情况下,对线路避雷器通流能力及安装方式提出新的要求。笔者主要对地线拆除对线路防雷性能影响、以及无地线情况下线路避雷器通流能量等问题进行研究,以指导线路避雷器合理选型及安装,保证线路避雷器的安全可靠运行和防雷保护效果。Ground wire icing is one of the important reasons for ice damage of transmission lines. In special sections, removing ground wires can be used as anti-icing measures. The removal of the ground wires has a direct impact on the lightning protection performance of the line. In order to ensure the lightning protection level of the line, the line arrester can be installed. In the case of no ground wires, new requirements are put forward for the current carrying capacity and installation mode of line arrester. The author mainly studies the impact on the lightning protection performance of lines after removing ground wires and the energy capability of line arresters without ground wires, so as to guide the rational selection and installation of line arresters, ensuring the safe and reliable operation and lightning protection effect of line arresters.

关 键 词：拆除地线 避雷器 分流系数 通流容量 

分 类 号：TM862[电气工程—高电压与绝缘技术]