高速列车屏蔽线转移阻抗与屏蔽效能研究  

The research on the surface transfer impedance and shielding effectiveness of high-speed railway shielded cable

作　　者：胡小龙 李常贤[1,2] Hu Xiaolong;Li Changxian(School of Automation and Electrical Engineering,Dalian Jiaotong University,Dalian 116028,China;National and Local Joint Engineering Research Center for Rail Transit Equipment,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]大连交通大学自动化与电气工程学院,大连116028 [2]大连交通大学轨道交通装备国家地方联合工程研究中心,大连116028

出　　处：《电子测量技术》2022年第5期80-85,共6页Electronic Measurement Technology

摘　　要：针对高速动车组屏蔽线缆受电磁干扰问题,在单层屏蔽转移阻抗解析法模型的基础上,考虑双层屏蔽对屏蔽层直流阻抗和小孔电感的影响,提出用于计算高速动车组屏蔽线缆转移阻抗的双层屏蔽解析法优化模型。同时结合传输线与屏蔽效能理论,推导屏蔽效能与转移阻抗的定量关系,以及芯线受到传导干扰后的理论数学模型。最后,以某动车组屏蔽线缆为研究对象进行建模仿真,分析线缆受扰情况,对比CST仿真值与计算值,验证了本文所提优化模型的正确性。优化模型在各频段的计算误差均值低于10%,验证了优化模型的有效性。揭示了高速动车组屏蔽线缆的受扰机理。Aiming at the problem of electromagnetic interference in the shielded cables of high-speed railway.On the basis of the analytical model of single-shielded transfer impedance.Considering the effect of the double-shielded on the DC impedance and small-hole inductance of the shielded layer,an analytical optimization model is proposed for the shielded cables of high-speed railway.Combined with the theory of transmission line and shielding efficiency,the quantitative relationship between shielding efficiency and transfer impedance is proposed,and the theoretical mathematical model of core wire subjected to conduction interference is given.Finally,the shielded cable of high-speed railway is taken as the research object for modeling and simulation,in order to analyze the disturbance situation of the cable.Comparing the simulation value and the calculated value,which verifies the correctness of the model.The error rate of the optimization model is less than 10%,which verifies the effectiveness of the model.The disturbance mechanism of shielded cable of high-speed railway is revealed.

关 键 词：转移阻抗 屏蔽效能 双层屏蔽 传输线理论 电磁兼容 

分 类 号：TM248[一般工业技术—材料科学与工程]