特高压直流输电线路与金属回线共塔经济性研究  

Economic analysis of UHVDC transmission line and metal return line on the same tower

作　　者：肖明杰 刘文勋 吴高波 张瑚 柏晓路 XIAO Mingjie;LIU Wenxun;WU Gaobo;ZHANG Hu;BAI Xiaolu(Central Southern China Electric Power Design Institute Co.,Ltd.,of China Power Engineering Consulting Group,Wuhan Hubei 430071,China)

机构地区：[1]中国电力工程顾问集团中南电力设计院有限公司,湖北武汉430071

出　　处：《宁夏电力》2022年第2期7-11,共5页Ningxia Electric Power

摘　　要：直流输电线路工程存在接地极极址及接地极线路路径选择困难这一突出问题。采用金属回线来代替大地回线且金属回线与极导线同塔架设,可以取消接地极和接地极线路,节约走廊资源和工程投资。针对四种典型共塔塔型,从铁塔费用和走廊费用两方面进行经济性对比分析,给出杆塔型式选择的建议:一般工程应用条件下,推荐采用塔型一,其塔材指标先进、走廊费用低,经济性好;在交叉跨越物较多地区,塔型二塔材指标先进,但运维要求高,需与塔型一进行综合对比,选择合理塔型。HVDC transmission line projects face problems in selection of grounding electrode site and grounding electrode line path. Metal return line is used to take place of ground return and set up with HVDC polar conductor in the same tower. So the grounding electrode and grounding electrode line could be abolished and corridor resources and project investment could be saved. In view of four typical tower types, economic analysis and comparison are made from two aspects of tower cost and corridor cost, and suggestions for tower type selection are given. Under the general engineering conditions, tower type one is recommended, whose tower material index is advanced, corridor cost is low, and economical efficiency is good. In area where there are many crossings, for tower type two, the tower material index is advanced, the operation and maintenance requirements is high. So comprehensive comparison of tower type one and tower type two should be made for a better type selection.

关 键 词：直流输电 极导线 金属回线 走廊 经济性 

分 类 号：TM721.1[电气工程—电力系统及自动化]