Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

Article retrieval

文章检索

首页 >> 文章检索 >> 往年索引

基于ANSYS电气设备接头的电热耦合场分析

来源:电工电气发布时间:2017-10-19 13:19 浏览次数:8
基于ANSYS电气设备接头的电热耦合场分析
 
李想,张琦,王晓娟,周颖
(三峡大学 电气与新能源学院,湖北 宜昌 443002)
 
    摘 要:因电气设备电接触不良而导致设备局部放热,是导致电网事故的主要原因之一。基于霍姆电接触理论,利用ANSYS 软件建立更为直观的球面导体接触模型。该模型充分考虑了电气设备连接处实际接触散热情况,利用有限元法对接头进行电热耦合场分析。仿真结果表明了在同种材料和不同材料接触时,最高温度均发生在接触斑点处;但当不同材料接触时,上下接头的温度场分布不一样,接头最终温度受材料的电阻系数、导热系数等因素影响,电阻系数越大,导热系数越小,最终接头的温度越高,如果电流过大,一般这种材料先发生软化或熔化。
    关键词:电接触;电热耦合;稳态热分析;有限元分析
    中图分类号:TM503+.5     文献标识码:A     文章编号:1007-3175(2017)10-0034-04
 
Analysis of Electro-Thermal Coupling Field of Electrical Equipment Contact Based on ANSYS
 
LI Xiang, ZHANG Qi, WANG Xiao-juan, ZHOU Ying
(College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China)
 
    Abstract: That the bad contact of electrical equipment leads to the equipment local heating is the main cause of power network accidents. Based on Holm's contact theory, the software ANSYS was used to build a more intuitive spherical conductor contact model. This model sufficiently considered the actual contact heat dissipation of the electrical equipment junction and used the finite element method to analyze the electro-thermal coupling. The simulation result shows that the highest temperature occurs at the contact spot whether the contact surfaces have the same materials or not. However, when the different materials contact, the upper and lower joints of the temperature field distribution are different, and the final temperature of the contact will be affected by resistance coefficient and heat conductivity coefficient etc. The bigger the resistance coefficient, the smaller the heat conductivity coefficient and the higher the final contact temperature. If overcurrent occurs, the material will soften or melt firstly.
    Key words: electrical contact; electro-thermal coupling; steady state thermal analysis; finite element analysis
 
参考文献
[1] 刘子民,吴骏,刘晓锋. 影响并沟线夹接触电阻的因素研究[J]. 电气技术,2016,17(10):132-134.
[2] 袁德富.10 kV并联电容器组发热原因分析及其对策[J]. 通讯世界,2016(14):154-155.
[3] WILSON C, MCINTOSH G, TIMSIT R S.Contact Spot Temperature and the Temperature of External Surfaces in an Electrical Connection[J]. International Conference on Electrical Contacts,2012,259(3):12-17.
[4] PARK S W, CHO H. A Practical Study on Electrical Contact Resistance and Temperature Rise at at the Connections of the Copper Busbars in Switchgears[J].Electrical Contacts,2015,5(17):1-7.
[5] 张建峰,王翠玲,吴玉萍,等. ANSYS有限元分析软件在热分析中的应用[J]. 冶金能源,2004,23(5):9-12.
[6] 任万滨,武剑,陈宇,等. 电触点材料接触电阻高精密测量技术[J]. 电工技术学报,2014,29(1):31-36.
[7] 周蠡,鲁铁成,张博,等. 基于三维分形接触电阻模型的粗糙表面多物理场耦合分析[J]. 电工技术学报,2015,30(14):226-232.
[8] 任晓霞. ANSYS在低压电器触头电接触稳态热分析中的应用[J]. 电气技术,2008,9(12):83-85.
[9] 卢旻. 基于ANSYS 仿真的10 kV 开关柜绝缘改造[J].电气技术,2015,16(9):83-85.
[10] 杨华威,袁广江,肖刘.ANSYS 接触单元在接触热阻仿真中的应用[J]. 微波学报,2012(S2):241-244.
[11] 侯亚丽,汪建文,刘志刚. 微细长竖圆柱外侧的自然对流换热[J]. 制冷学报,2013,34(2):60-65.
[12] 钱滨江,伍贻文,常家芳,等. 简明传热手册[K].北京:高等教育出版社,1983.