交流电气化铁道通信电磁防护的研究  

Research on Electromagnetic Protection of Communication on Electrified Railway

作　　者：王邠[1] 

机构地区：[1]南京铁道职业技术学院,南京210015

出　　处：《铁道工程学报》2007年第3期60-64,共5页Journal of Railway Engineering Society

摘　　要：研究目的:交流电气化铁路不仅对通信系统引起干扰,还会使电气化铁路附近的金属与导体间或金属导体与大地间产生感应电压而危及设备和人员安全,干扰通信设备正常工作。为保证通信安全,需要对电气化铁路对铁道通信的电磁影响和电磁防护进行研究,从而给铁路现场实际工作提供一定的理论依据。研究方法:本文利用电磁场对地下传输系统激励耦合的传输线方程及其一般解,建立了交流电气化铁路对地下传输系统干扰影响的分析方法。研究结果:研究得出了电气化铁路对铁道通信的影响机理,电气化铁路对铁道通信危险影响的限值,以及磁耦合影响、地电流影响和干扰影响计算公式,计算出了引起超限隔距数据。研究结论:电气化铁路的铁道通信电缆和铁道通信光缆电磁防护措施,可以有效地控制交流电气化铁路对铁道通信光、电缆的影响,达到电磁防护的目的。Research purposes： The alternate current electrified railway not only causes the interference to the railway communication system, but also generates induction voltage between metal and conductor, or between metal conductor and the earth nearby the electrified railway, which would interfere the normal work of the communication equipments. So it is necessary to do the researches on the interferences on communication by electrified railway, and electromagnetic protection of the communication system in order to provide certain theoretic basis for the real works to guarantee the running safety of communication system. Research methods： In this paper, the method of analyzing the interferences on the underground communication system by electrified railway was established by adopting the equation of electromagnetic field to activate coupling of underground transmission line and its solution. Research results： The following mechanism, limitation value, formula and data are obtained and calculated： the mechanism for the interference on railway communication by electrified railway, the limitation value of interfering railway communication by electrified railway, formulas for calculating interference of magnet coupling and interference of earth current, and the data related to causing isolated distance exceeding limitation value. Research conclusions：The interference on the cable and fiber cable in the railway communication system by electrified railway can be controlled effectively by adopting the relevant protection measures for the cable and fiber cable, therefore,the purpose of electromagnetic protection can be achieved.

关 键 词：电气化铁道 通信 电磁防护 

分 类 号：TN913[电子电信—通信与信息系统]