摘要
为分析在接触网检修接地时,由单根轨条和回流线短接产生的不平衡条件对25 Hz相敏轨道电路的影响,在六端网络的基础上建立轨道电路不平衡传输模型,通过仿真计算和对比,得到在不平衡传输条件下,信号接收端轨面电压的衰减和扼流变压器上不平衡牵引电流,随道床泄漏导纳、单轨条接地位置、吸上与横向连接设置变化的关系,并利用实验数据和现象验证计算结果。结合实际案例中检修接地的不平衡传输条件导致轨道电路“红光带”问题,给出其产生原因,并验证上述理论。给出减少不平衡传输条件对轨道电路造成影响的方法,尽可能避免该类型“红光带”问题的出现。
In this study,to analyze the impact of unbalanced conditions caused by short circuit of a single rail and the traction return cable on the 25 Hz phase sensitive track circuit during the catenary maintenance grounding,firstly,an unbalanced transmission model was established for the track circuit based on six-port network.Through the simulation and comparison,under the unbalanced transmission conditions,the attenuation of the rail top voltage at the signal receiving side and the unbalanced traction current on the impedance bond transformers were found to be affected by the leakage admittance of the track,the grounding position of the single rail and the changes in the setting of the boosting cable and transverse connection wire.Those relationships were verified by the track circuit data and phenomena in experiments.After that,the study further gave the reasons for the“red light strap”problem of track circuit display equipment caused by the unbalanced transmission conditions during maintenance grounding in combination with practical cases,so that the theory was verified.Finally,the study provided ways to prevent the unbalanced transmission conditions from affecting the track circuit,so as to avoid the occurrence of this type of“red light strap”problem as far as possible.
作者
范景腾
杨武东
郭进
杨轶轩
冯小川
FAN Jingteng;YANG Wudong;GUO Jin;YANG Yixuan;FENG Xiaochuan(School of Information Science and Technology,Southwest Jiaotong University,Chengdu 611756,China;CRSC Research&Design Institute Group Co.,Ltd.,Beijing 100070,China;Chengdu Turboost Railway Signal Technology Co.,Ltd.,Chengdu 610041,China)
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2024年第5期76-84,共9页
Journal of the China Railway Society
基金
中国国家铁路集团有限公司科技研究开发计划(K2021G016)
中国铁路青藏集团有限公司科技研究开发计划(QZ2021-D01)。
关键词
不平衡传输条件
轨道电路
接触网检修
牵引回流
红光带
unbalanced transmission condition
track circuit
catenary maintenance
traction current
red light strap
