特高压交直流并行输电线路混合电场分布  

Research on Hybrid Electric Field Distribution of UHV AC/DC Parallel Transmission Lines

作　　者：方书博 冯智慧[1,2,3] 张广洲 姚德贵[4] 李牧 FANG Shubo;FENG Zhihui;ZHANG Guangzhou;YAO Degui;LI Mu(NARI Group Corporation Ltd.,Nanjing 211106,China;Wuhan NARI Limited Liability Company,State Grid Electric Power Research Institute,Wuhan 430074,China;Hubei Key Laboratory of Power Grid Lightning Risk Prevention,Wuhan 430074,China;State Grid Henan Electric Power Research Institute,Zhengzhou 450052,China)

机构地区：[1]南瑞集团有限公司,江苏南京211106 [2]国网电力科学研究院武汉南瑞有限责任公司,湖北武汉430074 [3]电网雷击风险预防湖北省重点实验室,湖北武汉430074 [4]国网河南省电力公司电力科学研究院,河南郑州450052

出　　处：《中国电力》2020年第3期84-90,共7页Electric Power

基　　金：国家电网公司科技项目(±800 kV直流线路与交流线路并行时的电磁环境监测及评估研究)~~

摘　　要：为了降低交直流并行线路混合电场在输电走廊附近民房及金属支架上产生的静电感应影响,在交直流线路并行区域民房平台上搭建平行于线路的屏蔽线,分别测量了平行线路方向的工频电场和直流合成场分布,分析了屏蔽线架设高度、根数等对线路混合电场的屏蔽效果。在并行区域地面搭建了葡萄架模型,测量了不同网架结构的感应电压分布。结果表明,架设屏蔽线能够有效改善导线下方空间混合电场且存在最佳屏蔽方式,葡萄架感应电压受架设方式和长度的影响较大,最大感应电压对人体无电击刺痛感。In order to reduce the electrostatic induction effect of hybrid electric field generated by the UHV AC/DC parallel lines on residential houses and metal supports near the transmission corridor,this paper put up shielding wires paralleled to the AC/DC lines on the platform of residential buildings in the parallel to the AC/DC lines were established,and measured Distributions of the power frequency electric field and DC ionized field in parallel line direction were measured respectively,and the impacts of wires’height and number on the shielding effect on the hybrid electric field were also analyzed.And then built grape trellis metal support models for grape growing parallel to the AC/DC lines were set up,and the induced voltage distributions with different grid structures were measured.The results show that the shielding wires can effectively improve the spatial mixed electric ionized field under transmission lines can be effectively reduced by the shielding wires,and that has exist the best shielding structure of the wires also exists.The induced voltage of the metal support was greatly influenced by the support,and the maximum voltage value had no tingling sensation to the human body.

关 键 词：并行线路 混合电场 静电感应 屏蔽线 屏蔽效果 

分 类 号：TM75[电气工程—电力系统及自动化]