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轨道电路对分相区暂态牵引电流干扰的抑制方法

杨世武 陈炳均 陈海康 崔勇 唐乾坤

杨世武, 陈炳均, 陈海康, 崔勇, 唐乾坤. 轨道电路对分相区暂态牵引电流干扰的抑制方法[J]. 西南交通大学学报, 2019, 54(6): 1332-1341. doi: 10.3969/j.issn.0258-2724.20180692
引用本文: 杨世武, 陈炳均, 陈海康, 崔勇, 唐乾坤. 轨道电路对分相区暂态牵引电流干扰的抑制方法[J]. 西南交通大学学报, 2019, 54(6): 1332-1341. doi: 10.3969/j.issn.0258-2724.20180692
YANG Shiwu, CHEN Bingjun, CHEN Haikang, CUI Yong, TANG Qiankun. Suppression Solutions to Transient Traction Current Interference in Neutral Zone for Track Circuit[J]. Journal of Southwest Jiaotong University, 2019, 54(6): 1332-1341. doi: 10.3969/j.issn.0258-2724.20180692
Citation: YANG Shiwu, CHEN Bingjun, CHEN Haikang, CUI Yong, TANG Qiankun. Suppression Solutions to Transient Traction Current Interference in Neutral Zone for Track Circuit[J]. Journal of Southwest Jiaotong University, 2019, 54(6): 1332-1341. doi: 10.3969/j.issn.0258-2724.20180692

轨道电路对分相区暂态牵引电流干扰的抑制方法

doi: 10.3969/j.issn.0258-2724.20180692
基金项目: 中国铁路总公司技术标准编制项目(17CR062)
详细信息
    作者简介:

    杨世武(1967—),男,教授,工学博士,研究方向为铁路信号抗干扰技术,E-mail:ysw@bjtu.edu.cn

  • 中图分类号: U284.2

Suppression Solutions to Transient Traction Current Interference in Neutral Zone for Track Circuit

  • 摘要: 电力机车及动车组经过含分相区的轨道区段时,暂态牵引电流中包含的谐波电流可能对轨道电路形成干扰并引发故障. 为保障轨道电路在谐波影响下可靠工作,对暂态电流干扰抑制方法进行了研究. 首先,按照欧标中加窗FFT (fast Fourier transformation)方法设计了谐波数据处理流程,给出现场测试数据分析结果,说明对轨道电路形成干扰的原因;然后,以信号载频1 700 Hz和谐波1 750 Hz为实例,从直接抑制谐波干扰的角度简要讨论了基于FPGA (field-programmable gate array)的FIR (finite impulse response)数字滤波器方案和仿真结果,并指出由于信号频带与谐波干扰非常接近,必然以较高阶数和处理延时作为代价;最后,基于谐波干扰的电流源特征和工程可行性,提出并重点阐述了轨道电路发送器和衰耗器的协同优化方案,通过合理配置发送器电平和衰耗器级数,在满足轨道电路调整、分路和机车信号状态的约束条件下,提高对谐波干扰的抑制效果,可将信号干扰比提高6 dB.

     

  • 图 1  加窗FFT处理谐波数据流程

    Figure 1.  Flowchart of harmonic data processing by utilizing windowed FFT

    图 2  列车过分相区钢轨电流波形与轨面电压频谱

    Figure 2.  Waveform of rail current and spectrum of rail surface voltage when a train passes neutral zone

    图 3  轨道电路抑制谐波干扰示意

    Figure 3.  Sketch of suppressing harmonic interference to track circuit

    图 4  输入信号与输出信号频谱

    Figure 4.  Spectra of input and output signals

    图 5  轨道电路受扰模型

    Figure 5.  Model of track circuit with interference

    图 6  优化方法流程

    Figure 6.  Flowchart of optimization method

    图 7  优化后可取参数SIR示意

    Figure 7.  SIR using optimized parameters

    表  1  暂态谐波电流及比例

    Table  1.   Transient harmonic current and its proportion

    谐波频率/Hz电流/A比例/%谐波频率/Hz电流/A比例/%
    1 5500.1490.311 8000.0400.09
    1 6000.0850.181 8500.0580.13
    1 6500.1280.281 9000.1000.22
    1 7000.0630.161 9500.1490.31
    1 7500.2950.612 0000.0480.10
    下载: 导出CSV

    表  2  谐波1 750 Hz时测试数据

    Table  2.   Filed test data in the case of 1 750 Hz harmonic

    序号钢轨 1 电流/A钢轨 2 电流/A总电流/A不平衡度/%轨面电压/V视入阻抗/Ω
    1 0.425 0.347 0.772 10.01 0.090 1.159
    2 0.426 0.347 0.773 10.12 0.048 0.611
    3 0.386 0.309 0.695 11.12 0.102 1.313
    4 0.463 0.386 0.849 9.09 0.157 2.032
    5 0.579 0.463 1.043 11.12 0.143 1.231
    下载: 导出CSV

    表  3  数字滤波器衰减特性

    Table  3.   Attenuation characteristics of digital filter

    项目频率
    /Hz
    滤波前电压
    /mV
    滤波后电压
    /mV
    相对增益
    /dB
    谐波1 7504.250.30
    信号1 6712.051.2818.93
    1 7003.052.5021.29
    1 7292.081.5220.30
    下载: 导出CSV

    表  4  某故障区段发送器电平等级表

    Table  4.   Transmission voltage levels used in a fault section

    等级编号12345
    电平/V 142.0 126.0 111.0 95.0 79.2
    等级编号 6 7 8 9
    电平/V 62.8 47.3 31.8 15.8
    下载: 导出CSV

    表  5  不同电平等级对应衰耗参数

    Table  5.   Attenuation values for different voltage levels

    参数电平等级
    1234
    发送器电压/V 142 126 111 95
    衰耗参数范围 116∶(25~50) 116∶(28~53) 116∶(31~56) 116∶(37~60)
    SIR/dB 17.84~17.98 16.95~17.10 16.03~16.18 14.93~15.08
    SIR均值/dB 17.90 17.01 16.10 15.00
    下载: 导出CSV

    表  6  不同电平等级下优化组合仿真数据

    Table  6.   Simulation data of optimization strategy under different voltage levels

    项目参数电平等级
    1145
    参数取值发送器电压/V1421429579.2
    衰耗级数116:25116:50116:37116:43
    轨面干扰电压/V0.0950.0950.0950.095
    分路状态接收信号残压/V0.033 60.067 00.033 40.032 7
    接收干扰残压/V0.031 90.062 80.044 20.061 6
    接收器残压/V0.068 60.137 20.086 90.094 3
    机车信号短路电流/A1.016 31.016 30.679 90.566 9
    接收电压/V0.797 10.797 10.533 30.444 6
    衰减干扰/dB9.483.606.65
    信号/dB−0.24−6.23−0.18
    调整状态接收信号电压/V0.248 90.497 70.246 40.238 7
    接收干扰电压/V0.031 90.062 80.044 20.061 6
    调整SIR/dB17.8417.9814.9311.76
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-09-05
  • 修回日期:  2019-03-04
  • 网络出版日期:  2019-03-15
  • 刊出日期:  2019-12-01

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