钢轨互阻抗对邻线信息传输的干扰影响分析  

Effect Analysis of the Rail Mutual Impedance on Adjacent Line Information Transmission

作　　者：赵翠琴 武晓春 ZHAO Cui-qin;WU Xiao-chun(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学自动化与电气工程学院

出　　处：《兰州交通大学学报》2020年第1期73-79,共7页Journal of Lanzhou Jiaotong University

摘　　要：列控车载设备通过电磁感应的方式接收来自ZPW-2000轨道电路的移频信号.在此过程中,信号易因耦合干扰而导致接收有误,影响行车安全及效率.针对多线并行轨道,基于耦合干扰原理,建立钢轨单元耦合干扰等效电路模型.根据传输线的互阻抗求解方法,通过对路基沉降前后钢轨互阻抗进行仿真.结果表明,钢轨互阻抗越大,线路衰耗越大,邻线干扰问题越严重,且路基沉降会使钢轨互阻抗增大.The on-board equipment of train control system receives the frequency-shift signal from ZPW-2000 track circuit by electromagnetic induction.In this process,the signal is easily disturbed by the coupling interference,which may affect the driving safety and efficiency.Based on the principle of coupling interference,the equivalent circuit model of the rail element coupling interference for the multi-line parallel track circuit is established.According to the method for the calculation of the mutual impedance of the transmission line,the mutual impedance of the rail is simulated before and after the subgrade settlement.The results show that the greater mutual impedance of the rail,the greater the line attenuation;The more serious of the adjacent crosstalk problems,the greater the mutual impedance of the rail caused by the subgrade settlement.

关 键 词：轨道电路 邻线干扰 耦合干扰 互阻抗 路基沉降 

分 类 号：U284.93[交通运输工程—交通信息工程及控制]