城市轨道交通系统产生的无线电干扰频率和源强特性的研究

Radio Interference Frequency and Source Strength Features Produced by Urban Rail Transit System

城市轨道交通系统运行时将产生宽频带的无线电干扰,可能影响沿线信号楼、调度楼内通信信号设备和车站机电设备的正常工作,从而影响行车指挥、调度系统、客服系统以及防灾等系统的可靠性,影响城轨系统的运输安全和效率。对目前普遍应用的几种牵引供电制式的城轨交通进行了研究,测试并分析其产生的无线电干扰的频率和源强特性,得出了距线路10 m、9 kHz^1 000 MHz频段的无线电干扰频率特性曲线及干扰源强,评价其是否符合相关标准,指出了其对通信、信号、机电等设备干扰影响的分析方法。本项研究成果对城市轨道交通电磁干扰分析具有重要的参考价值。

The broadband radio interference produced in the operation of urban rail transit system may affect the daily work of the communication,mechanical and electrical equipment in the signal buildings and dispatch buildings along the line,that will threaten the reliability of traffic command system,dispatching system,customer service system and disaster prevention system,weaken the transportation security and urban rail transit efficiency.In this paper,some kinds of traction power supply system commonly used in urban rail transit system are studied,the radio interference frequency produced by rail transit and the source strength characteristics are tested and analyzed,the interference frequency characteristic curve in 9 kHz^1 000 MHz frequency band 10 m away from the line,and the interference source strength are obtained,its compliance with the relevant standards is evaluated.On this basis,the analysis method of radio interference effect on communication,signal,mechanical and electrical equipment is proposed.This research has a certain reference value for the analysis of urban rail transit electromagnetic interference.