摘要
随着通信技术发展,城市轨道交通信号系统已经全面进入移动闭塞控制时代,对应的系统架构早已脱离传统地面轨道电路的束缚。但是,为保证通信设备故障时不影响全线正常运营,大部分城市的轨道交通仍然采用计轴器作为次级轨道检测系统,负责检测列车占用轨道区段的情况。对于我国城市轨道交通来说,采用交流27.5 kV高压供电属于个例,由于目前各城轨线路普遍采用脉冲式计轴轨道电路,而供电接触网特性的改变造成交流牵引回流在钢轨传导,势必会对计轴磁头产生干扰,特别是在牵引回流瞬间产生变化时,计轴设备会出现受扰故障,轨道区段显示占用,从而影响行车。该文针对大兴机场线正线与库内停送电过程中,出现计轴受扰的问题展开研究,为后续市域高速轨道交通项目的发展打好基础。
With the development of communication technology,urban rail transit signaling system has fully entered the era of moving block control,and the corresponding system architecture has long been separated from the constraints of traditional ground rail circuit. However,in order to ensure that the failure of communication equipment will not affect the normal operation of the whole line,axle counters are still used as the secondary track detection system in most urban rail transit to detect the occupation of track sections by trains. For China’s urban rail transit,the use of AC 27.5 k V high voltage power supply is an example. At present,pulse axle counter track circuit is widely used in all urban rail lines,and the change of the characteristics of power supply catenary causes the AC traction return flow to conduct on the rail,which is bound to interfere with the axle counter head,especially when the traction return flow changes instantaneously. The axle counter equipment will be disturbed,and the track section shows occupation,whitch will affect the normal operation of the train. This paper studies the problem of axle counter interference in the process of power outage and transmission in the main line and depot of Daxing airport line,so as to lay a good foundation for the development of subsequent municipal high-speed rail transit projects.
作者
王鹏
黄健
袁大鹏
张洋洋
WANG Peng;HUANG Jian;YUAN Da-peng;ZHANG Yang-yang(Hebei Xiongan Rail Express Co.,Ltd.,Hebei 071700,China;Traffic Control Technology Co.,Ltd.,Beijing 100070,China)
出处
《自动化与仪表》
2022年第1期6-9,29,共5页
Automation & Instrumentation
关键词
计轴受扰
高压交流供电
牵引回流
axle counter disturbed
high voltage AC power supply
traction reflux
