Transient thermal network model for train-induced wind cooling dry-type on-board traction transformer in electric multiple units  

作　　者：Lijun Zhou Shuai Yuan Qiuyue Zhu Dongyang Wang Lujia Wang 

机构地区：[1]School of Electrical Engineering,Southwest Jiaotong University,Chengdu,China [2]School of Electrical and Power Engineering,China University of Mining and Technology,Xuzhou,China

出　　处：《High Voltage》2023年第3期514-526,共13页高电压（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Numbers:U1834203,52207180;Sichuan Science and Technology Plan Project(Youth Science and Technology Innovation Research Team Project),Grant/Award Number:2020JDTD0009;Fundamental Research Funds for the Central Universities,Grant/Award Number:2682022CX015。

摘　　要：Thermal characteristic is one of the key performances of dry-type on-board traction transformer(D-OBTT),which directly affects the operation safety of the new generation electric multiple units.However,due to the particularity of train-induced wind cooling mode of D-OBTT,the existing efficient thermal modelling methods cannot be used under fluctuating air velocity and load.A time-saving transient thermal model for D-OBTT is proposed.First,the framework of the transient thermal network model(TTNM)is proposed considering the coexistence of non-fully and fully developed state of the train-induced wind and the addition heat flow in the solid domain.Then,a novel formula for calculating the length of non-fully developed section considering the geometric dimensions and heat flux density is proposed based on computational fluid dynamics(CFD)parametric sweeps for the first time.The accuracy of TTNM is validated by a D-OBTT experimental setup,and the time consumption is significantly reduced compared with CFD.

关 键 词：TRACTION network THERMAL 

分 类 号：TM41[电气工程—电器]