电气化铁道脉冲电磁骚扰的Simulink模型  

Modeling and Simulating Impulse RF Noises of Electrical Railways in Simulink^(TM) Environment

作　　者：陈嵩[1] 沙斐[1] 王国栋[1] 

机构地区：[1]北京交通大学抗电磁干扰研究中心,北京100044

出　　处：《铁道学报》2009年第1期55-58,共4页Journal of the China Railway Society

基　　金：国家863计划课题(2007AA01Z277);铁道部科技研究开发计划项目(2007X006-B)

摘　　要：从分析电气化铁道弓网电火花的形成机理及条件入手,介绍在Simulink仿真环境中对该复杂条件模型的建模方法。模型由离线事件模拟器、放电电压条件判决器、触发源等模块组成,将机车车速、定位点跨距、弓网接触压力、受电弓质量、离线概率等诸多因素作为仿真的输入参数,能反映出机车运行时弓网间电火花噪声的动态变化。在此模型的基础上进行仿真并统计噪声的幅度概率分布。本文的研究为分析预测电气化铁道脉冲电磁骚扰对无线通信系统的干扰等问题提供了计算机仿真模型。在获取电气化铁路实际典型工况噪声采样的基础上,使用该模型可以对电气化铁道脉冲电磁骚扰进行普适性的模拟和研究,在一定程度上可以替代周期长、成本高的路测试验。A novel Simulink^TM RF（Radio Frenquency） noise model is proposed in order to analyze and predict the electromagnetic disturbance of electrical railways. The spark-gap phenomenon is the main RF noise source of electrical railways, which happens when the pantograph-catenary is disconnected transitorily. The model is constructed upon several conditions that meet the demands for discharging of electricity. It consists of several separated modules including a disconnection events simulator, a discharge voltage condition estimator and a sources trigger. The train velocity, catenary anchor span, contact pressure between pantograph and catenary, mass of pantograph and disconnection probability are all taken into consideration and they serve as the input parameters of the model. Simulation results based on this model illustrate the dynamic characteristics of the RF noises caused by spark gaps during locomotive running, and also provide some prediction for interference of electrical railways.

关 键 词：弓网离线 火花隙 击穿电压 脉冲噪声 建模与仿真 

分 类 号：U228.3[交通运输工程—道路与铁道工程] TN929[电子电信—通信与信息系统]