电力机车弓网离线电弧电磁辐射特性分析  

Analysis on the electromagnetic radiation properties of the offline bow net arc from the electric locomotive

作　　者：何成功 邓联文[1] 贺君[1] He Chenggong Deng Lianwen He Jun(School of Physics and Electronics, Central South University, Changsha 410083, China)

机构地区：[1]中南大学物理与电子学院,长沙410083

出　　处：《电子测量技术》2016年第9期31-33,50,共4页Electronic Measurement Technology

摘　　要：在电气化铁路系统中,由电力机车顶部受电弓与供电牵引网之间不正常接触产生的离线电弧成为电力机车电磁干扰的主要来源。对电力牵引系统中电力机车弓网离线电弧高频电磁辐射的产生机理进行了探讨,分析了常压下气体放电物理过程,基于流注理论,将交流电弧的近阴极效应产生的电子堆振荡作为弓网离线电弧的辐射源,并将电子堆振荡等效为对称振子,借助高频电磁仿真软件模块HFSS15对远场方向图进行了仿真分析,相关结果与有关文献报导的实测结果基本相符。In the electrified railway sections ,the offline bow net arc caused by pantograph‐catenary detachment is a main EMI noise to electrifed railways .The paper discussed the mechanism of EMI noise production through the theoretical analysis of the basic form of the gas discharge at atmospheric pressure .Then the dissertation further elaborated that electron swarm oscillate ,caused by near cathode effect of AC arc is the radiation source based on streamer theory . According to the electron swarm oscillate ,a dipole antennas model was presented in the paper .Moreover ,HFSS15 was used to simulate radiation characteristics of pantograph contact loss electric arc .The results are consistent with the experimental results reported in the literature .

关 键 词：弓网离线 电磁干扰 电子堆振荡 对称振子 

分 类 号：U228.2[交通运输工程—道路与铁道工程]