单相安装并联间隙在10 kV多回架空线路中的应用方法  

Application Method of Single-Phase Installation Parallel Gap in 10 kV Multi-Circuit Overhead Line

作　　者：胡嘉宴 杨鑫[1] 汤昕[2] 王延夫 HU Jiayan;YANG Xin;TANG Xin;WANG Yanfu(College of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410114,China;Changsha Electric Power Technical College,Changsha 410131,China;State Grid Xiangtan Power Supply Company,Xiangtan 411100,China)

机构地区：[1]长沙理工大学电气与信息工程学院,长沙410114 [2]长沙电力职业技术学院,长沙410131 [3]国网湘潭供电公司,湖南湘潭411100

出　　处：《电瓷避雷器》2023年第5期1-9,共9页Insulators and Surge Arresters

基　　金：国家自然科学基金面上项目(编号:52177015);湖南省教育厅科学研究项目(编号:19C0007和20C0004)。

摘　　要：加装单相同线安装方式的并联间隙,可有效提升10 kV架空裸导线路的耐雷水平。但目前相关研究仅针对10 kV单回架空线路,多回线路中仍存在并联间隙的安装数量、安装位置和放电电压数值的匹配问题。为此,本研究基于ATP-EMTP软件,搭建10 kV双回架空配电线路雷电过电压仿真模型。针对多回10 kV架空线路,分析了单相安装并联间隙的配置方法,并设计了多回线路耐雷水平的计算流程。以双回线路为计算实例,线路遭受感应雷过电压时,建议在每回线路的最高相上均安装一只并联间隙;线路遭受直击雷过电压时,仅在第一回线路的最高相安装一相并联间隙的防雷效果优于其他安装方式。所得结果为10 kV多回架空配电线路防雷方法的应用提供了参考。The method of installing parallel gaps on a single same line can effectively improve the lightning resistance level of 10 kV overhead distribution lines.However,the research methods at present mostly rely on simulation calculations,and only involve the effect on the lightning withstand level of 10 kV single-circuit overhead lines.There are still problems in the matching of the number of parallel gaps,installation positions and discharge voltage values in multi-circuit lines.For this reason,the author constructs a multi-conductor coupling model,and obtains the calculation method of the coupling overvoltage suppressed on the remaining lines when a parallel gap is installed on m conductors in an n-conductor system.The ATP-EMTP software is used to establish a 10 kV double-circuit overhead line lightning overvoltage simulation calculation model,which verifies that the quantitative calculation results derived from the theory and the simulation calculation results are highly equivalent.For multi-circuit 10 kV overhead lines,the configuration method of single-phase installation parallel gap is analyzed,and the calculation process of the line lightning resistance level under different parallel gap installation methods is obtained.Taking a double-circuit line as a calculation example,when the line is subjected to induced lightning overvoltage,it is recommended to install a parallel gap on the highest phase of each line;when the line is subjected to direct lightning overvoltage,install only on the highest phase of the first line.The lightning protection effect of one-phase parallel gap is better than other installation methods.The obtained results provide a reference for the application of lightning protection methods for 10 kV multi-circuit overhead lines.

关 键 词：10 kV架空线路 同塔多回 并联间隙 单相同线安装方式 耐雷水平 

分 类 号：TM863[电气工程—高电压与绝缘技术]