±800 kV特高压直流输电线路地线选型  

Selection of Ground Wire for ±800 kV UHVDC Transmission Lines

作　　者：朱罡 杨禹太 单军 王世龙 杨永宽 ZHU Gang;YANG Yutai;SHAN Jun;WANG Shilong;YANG Yongkuan(China Energy Engineering Group Yunnan Electrie Power Design Institute Co.,Ltd.,Kunming 650051,China;State Grid Weihai Power Supply Company,Weihai 264200,China;Shandong Eleetrie Power T＆T Engineering Company Co.,Ltd.,Jinan 250118,China;State Grid Shandong Electrie Power Construetion Company,Jinan 250001,China)

机构地区：[1]中国能源建设集团云南省电力设计院有限公司,云南昆明650051 [2]国网山东省电力公司威海供电公司,山东威海264200 [3]山东送变电工程有限公司,山东济南250118 [4]国网山东省电力公司建设公司,山东济南250001

出　　处：《山东电力技术》2018年第6期62-64,69,共4页Shandong Electric Power

摘　　要：利用解析法和数值法相结合的方式计算地线表面电场强度的变化情况。建立一个简单线路模型,分析地线表面电场强度变化规律,得出在满足设计规范要求下所需地线的截面积。在选择地线型号时应综合考虑地线截面积、导线极间距、地线保护角、对地距离等因素。从地线表面电场强度角度看,推荐±800 k V山西—江苏特高压直流输电线路工程一般段线路采用150 mm^2截面积地线。In this paper,the variation of the electric field intensity on the ground surface is calculated using both the analytical method and the numerical method.By establishing a simple circuit model,we analyzed the law of the variation of the electric field intensity on the ground surface and obtained the section area of the ground wire for complying design specification.In this paper,it is considered that the ground wire section area,the pole spacing,the ground wire protection angle and the distance to the ground should be taken into account when selecting the ground wire.From the electric field strength of the ground surface＇s point of view,it is recommended that the general line section of ±800 k V UHVDC transmission line from Shanxi to Jiangsu should be 150 mm2 cross-sections.

关 键 词：特高压架空输电线路 地线表面电场强度 有限元 

分 类 号：TM721[电气工程—电力系统及自动化]