摘要
研究目的:铁路运营中信号设备遭受列车过电分相产生的瞬态电磁干扰造成工作异常时有发生,给行车安全带来隐患。本文旨在通过理论分析,现场车载、地面信号设备受列车过分相干扰实测,弄清列车过分相干扰产生机理和干扰途径、方式及影响程度,从而为采取有效措施,降低或消除此类干扰提供技术支撑。研究结论:(1)列车过分相产生的瞬态骚扰通过空间辐射和传导方式传播,最终对信号设施产生瞬态电磁影响;(2)列车过分相对车载BTM端口造成的瞬态干扰主要是通过BTM天线直接耦合的差模脉冲干扰,其电平有时大于BTM接收信号电平,信噪比最差时可达-9 d B,从而影响BTM正常工作;(3)列车过分相产生的瞬态干扰通过牵引回流各途径共同作用耦合到轨旁信号设施中,在单个闭塞区间长度信号电缆感应电动势瞬时干扰测量值最大可达360 V,远超相关标准中60 V的限值要求,会对人身和设备的安全造成影响;(4)本研究结论可为高速铁路工程信号干扰防护设计提供参考依据。
Research purposes： In railway operation, because signal equipment suffers transient electromagnetic interference during the high - speed EMU （ Electric Multiple Unit） passing phase insulator, working abnormally often takes place, and brings hidden danger to operation safety. The objective of the paper is to clarify the disturbance product mechanism, route, mode, and influence level by theory analysis and disturbance test of on - board and trackside sensitive signal equipment, so as to provide technical support for taking effective measures to reduce or eliminate the disturbance. Research conclusions： （ 1 ） The transient disturbance generated by the EMU passing phase insulator would spread both through space radiation and conduction coupling, effecting on the signal equipment finally. （2） The transient interference caused by the EMU passing phase insulator to the on - board BTM port was mainly differential mode pulse interference directly coupled from the antenna of on - board BTM. The interference level was sometimes greater than the received signal level of BTM, the worst SNR achieved to - 9 dB. It could affect the normal work of the BTM. （3） The transient disturbance signal generated by the EMU passing phase insulator would be coupled to trackside signal facilities with all routes of traction current together. The maximum measured value of transient induced voltage in signal cable with length of single block section achieved to 360 V, which was far beyond the limit value of 60 V stipulated by the relevant standard, and would affect personal and equipment safety. （4） This research result can provide references for interference protection design of high speed railway signal system.
出处
《铁道工程学报》
EI
北大核心
2016年第7期71-77,共7页
Journal of Railway Engineering Society
关键词
动车组
过分相
暂态过程
信号设备
瞬态骚扰
EMU （electric multiple unit）
passing phase insulator
transient process
signal equipment
transient disturbance
