摘要
干式车载牵引变压器质量轻、安全系数高,但其内部热场随运行环境及负荷状态频繁波动。为实现干式车载牵引变压器绕组动态温度的快速计算,基于热电类比原理搭建分布式动态热网络拓扑结构,并借助CFD模型开展仿真试验,探究运行参数和风道尺寸对散热性能的影响,提出风道出口温度计算方法;基于干式车载牵引变压器绕组温升试验平台,验证动态温度计算模型的有效性。结果表明:针对不同结构参数和时变运行场景,所建绕组动态温度计算模型均能准确获取绕组区域温度分布及动态变化情况,相比CFD数值仿真节省99%以上的时间成本,有助于干式车载牵引变压器热容量的合理规划和设计效率的进一步提高。
The dry type vehicle mounted traction transformer,despite light weight and high safety factor,features frequently fluctuating internal thermal field with the operating environment and load status.To achieve rapid calculation of the dynamic temperature of the windings of dry-type vehicle mounted traction transformers,by constructing a distributed dynamic thermal network topology based on the principle of thermoelectric analogy,this paper conducted a series of simulation experiments using CFD models to explore the effects of operating parameters and duct size on heat dissipation performance.A calculation method was proposed for duct outlet temperature.Finally,the effectiveness of the dynamic temperature calculation model was verified based on the temperature rise test platform of the winding of the dry-type vehicle mounted traction transformer.The results show that for different structural parameters and time-varying operating scenarios,the established dynamic temperature calculation model of the winding can accurately obtain the temperature distribution and dynamic changes in the winding area.Compared with CFD numerical simulation,the model saves more than 99%of the time cost,and is helpful for the reasonable planning of the thermal capacity of dry vehicle traction transformers and further improving the design efficiency.
作者
王东阳
蔡小虎
夏颖怡
朱秋月
张涛
周利军
WANG Dongyang;CAI Xiaohu;XIA Yingyi;ZHU Qiuyue;ZHANG Tao;ZHOU Lijun(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China;China Southwest Architectural Design and Research Institute,Chengdu 610041,China;Safety Technology Center of National Railway Administration,Beijing 100160,China)
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2024年第4期38-46,共9页
Journal of the China Railway Society
基金
国家自然科学基金(U1834203)。
关键词
车载牵引变压器
热网络模型
动态温度计算
风道出口温度
热点温度
vehicle mounted traction transformer
thermal network model
dynamic temperature calculation
air duct outlet temperature
hotspot temperature
