特高压直流线路限制操作过电压用无间隙避雷器的安装方式  

Installation mode of gapless arrester for limiting operating overvoltage on UHV DC line

作　　者：杨博[1] 孙成贤 王宁宁[1] 孙传政 赵庆周 YANG Bo;SUN Chengxian;WANG Ningning;SUN Chuanzheng;ZHAO Qingzhou(Shandong Electric Power Engineering Consulting Institute Co.,Ltd.,Jinan 250100,China)

机构地区：[1]山东电力工程咨询院有限公司,山东济南250100

出　　处：《电力科学与技术学报》2021年第4期188-195,共8页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金(51307121)。

摘　　要：当前架空输电线路主要安装限制雷电过电压避雷器,限制操作过电压无间隙避雷器的安装及应用仍是空白,这种避雷器在±1100 kV昌吉—古泉特高压直流输电线路上首次安装,可将全线操作过电压限制在1.5 p.u.以下,从而缩减间隙值、减少杆塔尺寸及交叉跨越距离,大大节省工程投资。该文提出在线路直线塔和耐张塔上安装避雷器的多种方案;通过对比分析,选用外挑支架悬挂式安装避雷器方案为最佳方案;并在此基础上分析避雷器静、动态荷载,创新设计塔头布置型式、选型引流线及设计连接金具。通过实际工程中的安装和运行,首次验证特高压直流线路安装无间隙避雷器的可行性,为线路安装避雷器提供范例。Most of arresters are external gap arresters for limiting the lightning overvoltage on overhead transmission lines.Arresters for limiting operating overvoltage are not applied on power transmission lines.After the first installation of gapless arresters for limiting operating overvoltage on±1100 kV Changji-Guquan UHV DC transmission line,the operating overvoltage for the whole line can be limited below 1.5 p.u.,thus the clearance value is reduced,tower size and cross-over distance are reduced,engineering investment is significantly saved.The installation schemes of arrester for line tangent and tension tower are proposed in this paper.Through comparative analysis,the hanging mounting scheme on the outer pick bracket is selected as the best scheme.The static and dynamic loads of arresters,innovative tower head layout design,drainage line selection and connection hardware design are analyzed on the basis of the best scheme.Through Installation and operation on real lines,the feasibility of installing gapless arresters on UHV DC lines is verified for the first time,and provides an example for the installation of gapless arresters.

关 键 词：无间隙 避雷器 限制操作过电压 特高压直流 直线塔 耐张塔 

分 类 号：TM753[电气工程—电力系统及自动化]