基于端口宏模型的移频轨道电路雷击响应分析  

Analysis of lightning strike response in frequency-shifted track circuit based on port macro-model

作　　者：赵斌[1] 李森森 宋玉华 高丽霞 王东 付帅 ZHAO Bin;LI Sensen;SONG Yuhua;GAO Lixia;WANG Dong;FU Shuai(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;China Railway 21st Bureau Group,Lanzhou 730070,China)

机构地区：[1]兰州交通大学自动化与电气工程学院,甘肃兰州730070 [2]中铁二十一局集团有限公司,甘肃兰州730070

出　　处：《铁道科学与工程学报》2025年第2期852-862,共11页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(51967010)。

摘　　要：为了解决轨道电路雷电过电压时域计算分段数多且计算复杂的问题,以ZPW-2000A型无绝缘移频轨道电路为例,基于Agrawal场线耦合模型建立轨道电路雷击响应分析模型。首先推导了牵引供电与轨道电路组成的多导体传输线系统的Agrawal场线耦合模型的解,并建立了一个易于实现的宏模型。将提出的宏模型与电磁暂态仿真软件PSCAD中“频率相关(相位)模型”组件结合,建立了用于计算轨道电路雷电过电压的模型。通过与时域有限差分法(FDTD)和实验数据对比验证该方法的准确性。最后,分析雷击接触线和雷击钢轨2种情况下的轨道电路雷电过电压,讨论传输距离和道床电阻等不同影响因素对雷电过电压的影响以及牵引网多导体传输线的线间耦合干扰。研究结果表明:当雷电直击钢轨时,雷电过电压极易超过信号设备的耐压范围,随着雷击点离轨道电路接收端距离减小,钢轨过电压的峰值随之增加,存在轨旁信号设备被击穿损坏的风险;道床电阻越大钢轨过电压的峰值也随之增大,其雷电过电压的危害越严重;大地电导率对钢轨过电压的影响较小,随着大地电导率的增加,钢轨过电压的峰值也有小幅度的增大;雷击接触线时,在牵引供电系统中接触线过电压峰值最大而保护线上的耦合过电压较小,各导线的终端响应存在震荡。研究结果对轨道电路雷电防护的理论计算具有一定的应用价值。To address the issue of excessive segmentation and the complex calculations involved in the time-domain analysis of lightning overvoltage in track circuits,a lightning response analysis model was established based on the Agrawals field-to-line coupling model.By taking the ZPW-2000A uninsulated frequency shifting track circuit as a case study,the lightning response analysis model of track circuit was established based on the Agrawals field-to-line coupling model.First,the solution of the Agrawals field-to-line coupling model for the multi-conductor transmission line system composed of traction power supply and track circuit was derived,and a practical macro model was established.The proposed macro-model was combined with the“Frequency Dependent(Phase)Model”component of the electromagnetic transient simulation software PSCAD to develop a model for calculating the lightning overvoltage of track circuit.The accuracy of the method was verified by comparing with the finite difference time domain(FDTD)method and experimental data.Finally,the lightning overvoltage of track circuit was analyzed for both lightning strikes on contact wire and lightning strikes on rails,and the effects of different influencing factors,such as the transmission distance and the resistance of the roadbed,were discussed,as well as the interline coupling interference of the traction network’s multi-conductor transmission lines.Research results show that:when lightning strikes the rail,lightning overvoltage is likely to exceed the voltage range of signaling equipment,with the lightning strike point from the receiving end of the track circuit distance decreasing and the peak value of the rail overvoltage increasing,i.e.,there is a risk that the trackside signaling equipment is damaged by breakdowns.The greater increase the bed resistance of the rail overvoltage peak experiences,the more serious the harm of lightning overvoltage is.The earth’s electrical conductivity exerts smaller effect on the rail overvoltage,with the peak value of rail o

关 键 词：轨道电路 Agrawal场线耦合模型 PSCAD 雷电过电压 线间耦合 

分 类 号：U284.2[交通运输工程—交通信息工程及控制]