基于新型地线结构和运行方式的输电线路冰害防治技术  

Anti-icing Technology for Transmission Lines Based on New Ground Wire Structures and Operation Modes

作　　者：陈原[1] 范硕超 王馨[1] 于竞哲 宋鹏[1] 卢毅[1] CHEN Yuan;FAN Shuochao;WANG Xin;YU Jingzhe;SONG Peng;LU Yi(North China Electric Power Research Institute Co.,Ltd.,Beijing 100045,China;State Grid Jibei Electric Power Co.,Ltd.,Beijing 100052,China)

机构地区：[1]华北电力科学研究院有限责任公司,北京100045 [2]国网冀北电力有限公司,北京100052

出　　处：《高电压技术》2024年第11期4933-4941,共9页High Voltage Engineering

摘　　要：针对雨雪冰冻气象条件下的线路薄弱点——架空地线(含光纤复合架空地线(OPGW)及地线支架),首次提出“覆冰导致张力增大”与“放电温升导致局部机械强度下降”的双因素地线断线机理,相应提出基于新型地线结构和运行方式的线路冰害防治技术,包括:采用新型光纤搭载技术的分裂导线,大幅度提升架空地线覆冰载荷的承受能力,地线逐基开耐张且增设按线路操作过电压配置的地线耐张绝缘子,基于地线跳线拆装的防冰运行方式。该技术突破常规防冰理念,通过消除冰害期间的导-地线放电,以降低地线断线、倒塔和电网停运概率,具有投资增幅小、运维工作量小、提高光纤通信安全、可实施基于导线光纤的线路状态监测等优势。The overhead ground wire(including optical fiber overhead ground wire(OPGW)and ground wire support)is the weak point of lines under rainy,snowy,and frozen weather conditions.A dual factor mechanism for ground wire breakage is proposed for the first time in this paper,including two factors:increased tension caused by icing and a decrease in local mechanical strength caused by discharge temperature rise.Furthermore,a transmission line ice disaster prevention technology based on a new ground wire structure and operation mode is proposed,for example,adopting the new fiber-optic-carrying technology,significantly improving the ice load affordability of overhead ground wire,increas-ing the ground wire tension transform tower by tower,and adding ground wire tension insulators configured according to operating over-voltage,and adopting the antiicing operation mode based on disassembly and assembly of ground wire jumper,etc.The proposed technology breaks through conventional anti-icing concepts and effectively reduces the probability of ground wire breakage,tower collapses,and power outages by eliminating the discharge of ground wires during ice disaster.The technology also has significant advantages such as small increase in engineering costs,small operation and maintenance workload,improved fiber optic communication safety,and implementing line status monitoring based on wire optical fiber technology.

关 键 词：雨雪冰冻气象 输电线路 架空地线 地线开耐张 地线耐张绝缘子 防冰运行方式 导线光纤 

分 类 号：TM752[电气工程—电力系统及自动化]