铁道科学与工程学报2025，Vol.22Issue(2)：852-862,11.DOI:10.19713/j.cnki.43-1423/u.T20240716
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
摘要
Abstract
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 overvoltage slightly increasing with increasing earth conductivity.Lightning strikes the contact line in the traction power supply system;in the contact line,overvoltage peak value is the largest and the protection line of the coupling overvoltage is smaller,and the terminal response of each conductor there is an oscillation.The results of the study have certain application value for the theoretical calculation of lightning protection of track circuit.关键词
轨道电路/Agrawal场线耦合模型/PSCAD/雷电过电压/线间耦合Key words
track circuit/Agrawal's field-to-line coupling model/PSCAD/lightning overvoltage/line coupling分类
交通运输引用本文复制引用
赵斌,李森森,宋玉华,高丽霞,王东,付帅..基于端口宏模型的移频轨道电路雷击响应分析[J].铁道科学与工程学报,2025,22(2):852-862,11.基金项目
国家自然科学基金资助项目(51967010) （51967010）
