强风作用下四分裂输电导线子导线不同步脱冰跳跃动力响应研究  

Dynamic Response Analysis of Sub-conductor Non-synchronous Ice-shedding Under Strong Winds of Four-bundle Conductor

作　　者：杨展豪 吴田 刘会家[2] 王明 钟垒锋 王少奇 YANG Zhanhao;WU Tian;LIU Huijia;WANG Ming;ZHONG Leifeng;WANG Shaoqi(Hubei Provincial Engineering Technology Research Center for Power Transmission Line,China Three Gorges University,Yichang,Hubei 443002,China;College of Electrical Engineering and New Energy,China Three Gorges University,Yichang,Hubei 443002,China;State Grid Hubei Power Transmission and Transformation Engineering Co.,Ltd.,Wuhan,Hubei 430000,China)

机构地区：[1]三峡大学湖北省输电线路工程技术研究中心,湖北宜昌443002 [2]三峡大学电气与新能源学院,湖北宜昌443002 [3]国网湖北送变电工程有限公司,湖北武汉430000

出　　处：《广东电力》2024年第11期92-101,共10页Guangdong Electric Power

基　　金：国家自然科学基金资助项目(51807110)。

摘　　要：针对现有脱冰研究大多数将分裂导线等效为单根导线而忽视子导线不同步脱冰,且未考虑强风的问题,以JLHA1/G1A-300/70型钢芯铝绞线为研究对象,在ABAQUS软件中建立五档连续四分裂导线绝缘子间隔棒的脱冰跳跃模型;研究强风作用下4根、1根、2根及3根子导线脱冰工况下的动力响应,分析不同脱冰工况对子导线振动同步性的影响。结果表明:强风对四分裂导线最大脱冰跳跃高度存在显著影响,导线张力随风速的增加而增大;强风作用下大档距四分裂导线子导线不同步脱冰时,斜向对角子导线同步脱冰和横向上方子导线同步脱冰时较为稳定,子导线振动趋势相同;其他工况子导线不同步脱冰时,子导线振动不同步,导线存在严重扭转现象,这种扭转可能是不可逆的。研究强风作用下四分裂输电导线子导线不同步脱冰跳跃动力响应对输电线路空气绝缘间隙设计和线路运行维护具有重要的工程价值。Current ice-shedding studies predominantly consider bundled conductors as equivalent to single conductors,neglecting the asynchronous ice-shedding of sub-conductors and not accounting for strong wind conditions.This paper takes the JLHA1/G1A-300/70 typed steel-cored aluminum stranded conductor as the object,establishing an ice-shedding jump model in ABAQUS for a five-span continuous four-bundled conductor-insulator-spacer system.It studies the dynamic response of four,single,two,and three sub-conductor ice-shedding scenarios under strong wind conditions to examine the impact of different ice-shedding conditions on sub-conductor vibration synchronization.The results indicate that strong winds significantly affect the maximum ice-shedding jump height of four-bundled conductors,with conductor tension increasing with wind speed.Under strong wind conditions,when sub-conductors shed ice asynchronously in large-span four-bundled conductors,synchronous ice-shedding of diagonally opposite and upper transverse sub-conductors is relatively stable,with sub-conductors exhibiting similar vibration trends.In other cases of asynchronous ice-shedding,sub-conductors exhibit asynchronous vibrations and severe conductor torsion,which may be irreversible.It is of significant engineering value for the design of insulation gaps and the operation and maintenance of transmission lines studying the dynamic response of asynchronous ice-shedding jumps in quad-bundled transmission line sub-conductors under strong wind conditions.

关 键 词：四分裂导线 子导线 强风 不同步脱冰 动力响应 

分 类 号：TM752.5[电气工程—电力系统及自动化]