Transient Analysis of ZPW-2000 Track Circuit Based on FDTD Interface Method
WANG Zicheng1, GUO Jin1, ZHANG Yadong1, SU Lina1, SUN Ningxian2, CHEN Mingbao2
1. School of Information Science and Technology, Southwest Jiaotong University, Chengdu 611756, China; 2. Beijing HollySys Co. Ltd., Beijing 100176, China
Abstract：A track circuit performs a transient process when a train enters or departs a section. Therefore, its circuit state can be judged by the transient change of signals at the receiving end. The finite-difference, time-domain (FDTD) is a common numerical solution for the transmission line. However, the structure of the ZPW-2000 track circuit is more complex than that of general ones. Thus, the direct FDTD method does not work well. Therefore, an FDTD-based transient analysis method and an alternative transient program-electromagnetic transients program (ATP-EMTP) interface model for a ZPW-2000 track circuit is introduced. The entire module is divided into two parts:transmission line and centralised parameter network. The two parts are related by a controlled current source. The transmission line is solved using FDTD, and the centralised parameter network is solved using the ATP-EMTP. The simulation results of the ZPW-2000 track circuit show that the ballast and shunt residences have great impacts on the receiving-end signals. When the ballast resistance falls to 0.6 Ω·km, the receiving-end voltage drops from 2.0 V to about 0.5 V;when the shunt resistance increases to 0.2 Ω, the residual voltage at the receiving end rises to about 1.0 V. If only the threshold comparison method is used, the state of the track circuit is indistinguishable. However, a transient mutation ccurs in the receiving-end signals when the train enters or departs. This can be used to determine the shunt state of the track circuit.
米根锁,王彦快,王文波. 雷达图法在轨道电路分路不良预警中的应用[J]. 铁道学报,2013,35(11):66-70 MI Gensuo, WANG Yankuai, WANG Wenbo. Application of radar chart in poor shunting early warning for track circuit[J]. Journal of the China Railway Society, 2013, 35(11):66-70
[2]
孙上鹏,赵会兵,全宏宇,等. 基于定性趋势分析的无绝缘轨道电路电气绝缘节设备故障诊断方法[J]. 中国铁道科学,2014,35(1):105-113 SUN Shangpeng, ZHAO Huibing, QUAN Hongyu, et al. Equipment fault diagnosis for electrical separation joint of jointless track circuit using qualitative trend analysis[J]. China Railway Science, 2014, 35(1):105-113
[3]
赵斌,张友鹏,魏蕾. 轨道电路时域响应分析[J]. 铁道学报,2014,36(9):68-72 ZHAO Bin, ZHANG Youpeng, WEI Lei. Analysis on time responses of track circuits[J]. Journal of the China Railway Society, 2014, 36(9):68-72
[4]
赵斌,张友鹏. 基于傅里叶变换结合Q-D算法的轨道电路暂态分析[J]. 铁道学报,2015,37(11):78-83 ZHAO Bin, ZHANG Youpeng. Transient analysis of track circuits based on FFT & Q-D algorithm[J]. Journal of the China Railway Society, 2015, 37(11):78-83
[5]
傅佳伟,王小敏,郭进. ZPW-2000轨道电路的多轮对动态分路建模研究[J]. 铁道科学与工程学报,2018,15(9):2374-2384 FU Jiawei, WANG Xiaomin, GUO Jin. Research on dynamic multi-wheel sets shunted track circuit modeling[J]. Journal of Railway Science and Engineering, 2018, 15(9):2374-2384
[6]
张友鹏,祁欢,赵斌. 轨道电路分路态检测方法研究[J]. 铁道学报,2017,39(1):70-75 ZHANG Youpeng, QI Huan, ZHAO Bin. Research on method for detection of shunt state of track circuits[J]. Journal of the China Railway Society, 2017, 39(1):70-75
[7]
赵会兵,章宇舟,汪希时. 电容补偿式轨道电路若干问题的研究[J]. 铁道学报,1998,20(4):77-81 ZHAO Huibing, ZHANG Yuzhou, WANG Xishi. Study on some problems of track circuit with compensating capacitors[J]. Journal of the China Railway Society, 1998, 20(4):77-81
[8]
PAUL C R. Analysis of multi-conductor transmission lines[M]. New York:Wiley,1994:240-258
[9]
刘少斌,刘崧,洪伟. 色散介质时域有限差分方法[M]. 北京:科学出版社,2010:49-67
[10]
YUICHI T. Circuit-based FDTD method for transient analysis of mutually coupled system[C]//Proceedings of the 15th IEEE International Conference Electronics,Circuits and Systems. Washington D C:IEEE,2008:101-104
[11]
RACHIDI F, NUCCI C A, IANOZ M. Transient analysis of multi-conductor lines above a lossy ground[J]. IEEE Transactions on Power Delivery, 1999, 14(1):294-302
[12]
PAOLONE M, NUCCI C A, PETRACHE E, et al. Mitigation of lightning-induced over-voltages in medium voltage distribution lines by means of periodical grounding of shielding wires and of surge arresters:Modeling and experimental validation[J]. IEEE Transactions on Power Delivery, 2004, 19(1):423-431
