高速铁路站内绝缘节处轮轨接触阻抗研究  

Contact Impedance between Wheel and Rail in Insulating Section of high-speed Railway Station

作　　者：王晓明[1] 尚文斌 董昱[2] 尚文卿 WANG Xiao-ming;SHANG Wen-bin;DONG Yu;SHANG Wen-qing(School of Electrical and Inlbnnation Engineering,Lanzhou University of Technology,Lanzhou 730050,China;School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Department of Information Engineering,Shijiazhuang Engineering Vocational College,Shijiazhuang 050000,China)

机构地区：[1]兰州理工大学电气工程与信息工程学院,兰州730050 [2]兰州交通大学自动化与电气工程学院,兰州730070 [3]石家庄工程职业学院信息工程系,石家庄050000

出　　处：《铁道标准设计》2018年第6期151-155,共5页Railway Standard Design

基　　金：国家自然科学基金(61663021);甘肃省自然科学基金(1508RJZA090)

摘　　要：在分析切断点绝缘节处产生电弧放电原因的过程中,轮对经过绝缘节时形成的接触电阻对整个牵引回路具有很大的影响。接触电阻大小在短时间内大幅度的变化是形成电流突变的一个先决条件。因此,分析计算接触电阻的大小及其变化对研究切断点绝缘节处钢轨及绝缘节的烧损是必不可少的。目前,国内外在研究绝缘节处产生电弧放电的过程中,多采用实际测量的方式。而我国高铁迅速发展的情况下,这种方法加大了成本和工作量。提出将电接触理论运用到绝缘节处轮轨接触阻抗的计算过程中,建立相应的Mayr电弧模型,并通过相应案例分析来验证。分析显示:轮轨间的污染膜层对接触电阻大小的影响巨大,研究对绝缘节处电弧形成原因的理论分析具有重要意义。In analyzing the cause of the arc-discharge at the cut-off point insulation section,it is found that the contact resistance generated by the passing wheel has great influence on the whole traction loop.The significant change of the contact resistance in a short time is a prerequisite of the abrupt current change. Therefore,the analysis of the contact resistance and its changes is essential to the research on the burning of the insulation joint and the rail in the cut-off point insulation section. At present,the field measurement method is typically employed to study the arc-discharge in insulation section at home and abroad. However,with the rapid development of high-speed rail in China,this method has increased the cost and workload. For this reason,this paper proposes a Mayr arc model,which applies the electric contact theory to the calculation of the wheel-rail contact impedance in the insulation section and is verified by the corresponding case analysis. The analysis shows that the contamination layer between the wheel and the rail has great influence on the level of contact resistance. Therefore,the study in this paper has great significance to the theoretical analysis of the cause of arc-discharge in the insulation section.

关 键 词：电接触理论 污染膜层 动态接触电阻 Mayr电弧模型 

分 类 号：U238[交通运输工程—道路与铁道工程] U284.25