摘要
利用基于边单元的有限元法,按照磁-热弱耦合方法,建立了一台200km/h高速电力机车主变压器油箱的三维温度场有限元模型,并用有限元法分析计算优化前后油箱稳态温度场的分布。结果表明:最热点位置基本未变,但最热点温升由72.57°C降为71.34°C,左侧与右侧铜屏蔽最高温度下降3°C,温度分布更加均匀,验证了油箱屏蔽结构合理及优化分析正确。
This paper presents the analysis on the 3D thermal field of the oil tank of main transformer of 200km/h electric locomotive by the finite element method based on the edge element and coupled magnetic-thermal field method. The 3D steady-state thermal field of transformer oil tank before and after optimization is given and temperature rise is obtained. The analysis of the calculating results indicate that the location of hot-spot after optimization hardly varies, but the rise in temperature above air reduces from 72.57℃ to 71.336℃, the highest temperatures in both left and right copper shields decrease by 3℃ and temperature field distribution is more uniform. The correctness of optimization analysis and rationality of tank shield structure are confirmed.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2005年第8期21-23,共3页
High Voltage Engineering
关键词
电力机车主变压器
有限元法
耦合屏蔽结构
electric locomotive main transformer FEM
coupled-field
shield structure
