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基于多物理场耦合的J型线夹仿真分析 被引量:5

Simulation Analysis of J-Type Wire Clamp Based on Multi-Physics Coupling
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摘要 随着配网大力开展10 kV线路带电作业,J型线夹被广泛用于断接火项目,对其在线工作状态开展研究具有重要意义。为此建立了J型线夹1:1等比例仿真模型及其力-电-热耦合模型,考虑辐射和空气自然对流对散热的影响,采用三维多物理场耦合方法对其应力分布、电流密度分布以及温度分布进行了分析。结果表明:线夹在线工作时,应力分布极不均匀,接触面应力较大,最大值达到了6.8 G N/m^(2),线夹最大位移为1.04 mm;电流密度分布亦不均匀,线夹与导线间电流传递集中于接触面的1/4区域,60%以上电流流经该处,接触面利用率不高,但上下线夹间电流密度分布较为均匀;由于电流分布不均,线夹表面温度也存在差异,温升最高点出现在火线凹槽部位,其值为50 K。 Live operation of 10 kV lines is carried out in distribution network,in which J-type wire clamp are widely applied to liveline connection/disconnetion operation.It is of great significance to study the working status of J-type wire clamp.Using the 3-D multi-physics coupling method,an equal proportion model and a 3-D mechanical-electrical-thermal coupled model are established to analyze the stress distribution,current density distribution and temperature distribution of 10 kV J-type wire clamp.The result shows that the stress distribution,current transmission and temperature distribution are extremely uneven.The maximum stress of contact surface reaches 6.8×10^(9) N/m^(2),and the maximum displacement of the wire clamp is 1.04 mm.The current between the wire clamp and the wire is concentrated in the 1/4 area of the contact surface,where more than 60%of the current flows,resulting in the utilization ratio of the contact surface is low,but the current density distribution between the wire clamp is relatively uniform.The highest temperature occurs in the groove of the wire,with a value of 50 K.
作者 吴勤斌 马冬二 邹德华 王学禹 罗日成 WU Qinbin;MA Donger;ZOU Dehua;WANG Xueyu;LUO Richeng(School of Electric and Information Engineering,Changsha University of Science and Technology,Changsha 410004,China;Maintenance Company of State Grid Xinjiang Electric Power Co.,Ltd.,Urumqi 830000,China;State Grid Hunan Electric Power Company Power Transmission Maintenance Branch,Changsha 421002,China;Live Inspection and Intelligent Operation Technology State Grid Corporation Laboratory,Changsha 410002,China)
出处 《南方电网技术》 CSCD 北大核心 2021年第5期115-121,共7页 Southern Power System Technology
关键词 配网 带电作业 J型线夹 多物理场耦合 distribution network live working J-type wire clamp multi-physics coupling
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