弓网分离时刻牵引电流相位对弓网离线电磁骚扰影响研究  

Study on the Influence of Traction Current Phase on the Off-Line Electromagnetic Disturbance of Pantograph-Catenary at the Time of Pantograph-Catenary Separation

作　　者：张明志 杨轶轩 金梦哲 胡曼 曹鹤飞 刘尚合 ZHANG Mingzhi;YANG Yixuan;JIN Mengzhe;HU Man;CAO Hefei;LIU Shanghe(CRSC Research&Design Institute Group Co.,Ltd.,Beijing 100070,China;School of Traffic and Transportation,Shijiazhuang Tiedao University,Shijiazhuang Hebei 050043,China;School of Information Science and Technology,Shijiazhuang Tiedao University,Shijiazhuang Hebei 050043,China;Research Center for Electromagnetic Environmental Effects,Shijiazhuang Tiedao University.,Shijiazhuang Hebei 050043,China)

机构地区：[1]北京全路通信信号研究设计院集团有限公司,北京100070 [2]石家庄铁道大学交通运输学院,河北石家庄050043 [3]石家庄铁道大学信息科学与技术学院,河北石家庄050043 [4]石家庄铁道大学电磁环境效应研究中心,河北石家庄050043

出　　处：《中国铁道科学》2023年第2期151-158,共8页China Railway Science

基　　金：中国铁路通信信号股份有限公司十三五重大科技专项(2300-K1200039)。

摘　　要：弓网离线电弧引起的电磁辐射,是列控系统主要的电磁骚扰源之一。为研究弓网离线时刻牵引电流相位对弓网离线电磁辐射特性的影响,在实验室中搭建弓网分离时刻电流相位可控的低压大电流弓网离线拉弧模拟试验平台,同步采集不同离线相位下的电弧电压、电弧电流及电磁辐射的时域波形数据,通过对电磁辐射时域信号进行快速傅里叶变换(FFT),分析离线相位对电磁辐射信号频域特性的影响规律。结果表明:弓网离线拉弧放电过程中,起弧和熄弧时刻的电磁辐射通常大于稳定燃弧时的电磁辐射;离线拉弧电磁辐射主要频段的中心频率约为4,7,15和25 MHz左右,且不同频段电磁辐射强度与弓网分离时刻的牵引电流相位相关,4和7 MHz骚扰信号峰值出现在270°相位发生离线时,15 MHz骚扰信号峰值出现在234°相位发生离线时,25 MHz骚扰信号峰值出现在306°相位发生离线时;离线时刻相位的随机性是导致弓网离线干扰故障随机性的重要原因之一。试验结果对于搭建测试平台进行故障复现、研究过分相区断路器的分合闸控制策略以降低电磁骚扰,具有一定的借鉴和启发。The electromagnetic radiation caused by off-line arc of pantograph-catenary is one of the main electromagnetic disturbance sources in train control system.In order to study the influence of traction current phase on the off-line electromagnetic radiation characteristics of pantograph-catenary at the time of pantograph-catenary separation,a phase-controllable simulation test platform for off-line arcing of low-voltage high current pantograph-catenary at the time of pantograph-catenary separation was built in the laboratory;and the time domain waveform data of arc voltage,arc current and electromagnetic radiation under different off-line phases were synchronously sampled.Through the fast Fourier transform(FFT)transformation of electromagnetic radiation time domain signal,the influence law of off-line phase on the frequency domain characteristics of the electromagnetic radiation signal is analyzed.The results show that the electromagnetic radiation at the time of arc starting and arc extinguishing is usually greater than that at the time of stable arcing during the off-line arcing discharge of pantograph-catenary.The center frequencies of the main frequency band of the electromagnetic radiation of pantograph-catenary off-line arcing are about 4,7,15 and 25 MHz,and the electromagnetic radiation intensity in different frequency bands is related to the traction current phase at the time of pantograph-catenary separation.The peak value of 4 and 7 MHz disturbance signal appears when the current phase is 270°at the off-line time,the peak value of 15 MHz disturbance signal appears when the current phase is 234°at the off-line time,and the peak value of 25 MHz disturbance signal appears when the current phase is 306°at the off-line time.The randomness of the phase at the off-line time is one of the important reasons for the randomness of off-line interference fault of pantograph-catenary.The test results have certain reference and inspiration for building a test platform for fault recurrence and studying the opening and

关 键 词：弓网离线 电弧 电磁辐射 相位控制 逸出功 

分 类 号：U284.26[交通运输工程—交通信息工程及控制]