大电流封闭母线磁-流-热场耦合有限元分析  

Finite Element Analysis of Coupled Magneto-Fluid-Thermal Field for Large Current Enclosed Bus Bar

作　　者：丁斌[1] 徐耀良[1] 杨宁[1] 淡淑恒[1] 

机构地区：[1]上海电力学院电力系统及自动化学院,上海200090

出　　处：《高压电器》2010年第8期31-34,共4页High Voltage Apparatus

基　　金：上海市科委科技攻关项目资助(08240512000)

摘　　要：针对用解析法计算母线温升时存在的一些问题,笔者讨论了基于磁场-流场-热场耦合有限元分析的母线温升计算方法。首先计算母线的磁场和导体涡流分布,得到焦耳热源;然后基于流场-热场耦合的共轭传热模型,将前面计算得到的焦耳热加载为热源,进行温度场分析和温升计算。比较12500A大电流离相封闭母线的计算温升与该产品型式试验结果,误差小于2℃。该计算方法对于封闭母线的产品设计人员具有一定参考意义。Temperature rise calculation of enclosed bus bar based on finite element analysis of coupled magneto-fluid-thermal field is presented. Through magnetic field and eddy current analysis, the joule heat of bus bar and its metal enclosure is calculated. Then the joule heat is loaded into the conjugate heat transfer model with fluid-thermal field direct coupling to analyze temperature distribution of the bus bar. The error of simulated temperature rise of a 12 500 A enclosed bus bar is only about 2 ℃ compared to the experimental data.

关 键 词：母线 磁场 流场 共轭传热 耦合场分析 

分 类 号：TM645[电气工程—电力系统及自动化]