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乙丙橡胶电缆终端气隙局部放电过程及特征提取

郭蕾 曹伟东 白龙雷 邢立勐 项恩新 周利军

郭蕾, 曹伟东, 白龙雷, 邢立勐, 项恩新, 周利军. 乙丙橡胶电缆终端气隙局部放电过程及特征提取[J]. 西南交通大学学报, 2021, 56(5): 1011-1019, 1028. doi: 10.3969/j.issn.0258-2724.20200157
引用本文: 郭蕾, 曹伟东, 白龙雷, 邢立勐, 项恩新, 周利军. 乙丙橡胶电缆终端气隙局部放电过程及特征提取[J]. 西南交通大学学报, 2021, 56(5): 1011-1019, 1028. doi: 10.3969/j.issn.0258-2724.20200157
GUO Lei, CAO Weidong, BAI Longlei, XING Limeng, XIANG Enxin, ZHOU Lijun. Partial Discharge Process and Feature Extraction of Air Gap in EPR Cable Terminal[J]. Journal of Southwest Jiaotong University, 2021, 56(5): 1011-1019, 1028. doi: 10.3969/j.issn.0258-2724.20200157
Citation: GUO Lei, CAO Weidong, BAI Longlei, XING Limeng, XIANG Enxin, ZHOU Lijun. Partial Discharge Process and Feature Extraction of Air Gap in EPR Cable Terminal[J]. Journal of Southwest Jiaotong University, 2021, 56(5): 1011-1019, 1028. doi: 10.3969/j.issn.0258-2724.20200157

乙丙橡胶电缆终端气隙局部放电过程及特征提取

doi: 10.3969/j.issn.0258-2724.20200157
基金项目: 四川省科技计划青年科技创新研究团队项目(2020JDTD0009)
详细信息
    作者简介:

    郭蕾(1981—),女,副教授,博士,研究方向为牵引供电系统建模和电能质量分析,E-mail:guolei_mail@swjtu.cn

    通讯作者:

    周利军(1978—),男,教授,博士,研究方向为电气设备状态检测与故障诊断,E-mail:zhoulijun@swjtu.cn

  • 中图分类号: TM852

Partial Discharge Process and Feature Extraction of Air Gap in EPR Cable Terminal

  • 摘要: 高速列车乙丙橡胶(ethylene propylene rubber,EPR)电缆终端由于制作、安装不规范,导致终端内部出现气隙,气隙部位的局部放电将严重影响高速列车的正常运行. 为了分析气隙缺陷下25 kV乙丙橡胶电缆的局部放电过程及特性,制作了含气隙缺陷的电缆试样,测量了试样自起始放电至击穿全过程的放电参量及局部放电相位(phase resolved partial discharge,PRPD)谱图发展过程,并基于Gaussian金字塔与灰度共生矩阵的方法对放电全过程的PRPD谱图进行了特征提取. 研究表明:根据放电参量的变化规律,可将整个放电过程分为放电发展阶段、放电持续阶段、临近击穿阶段;基于各阶段的PRPD谱图呈现的不同形貌,使用多尺度的灰度共生矩阵方法提取出的角二阶矩、熵、对比度等特征可用于放电阶段的表征.

     

  • 图 1  试验平台

    Figure 1.  Test platform

    图 2  试验加压方式示意

    Figure 2.  Schematic of test voltage-adding mode

    图 3  QpeakQavgN随时间变化

    Figure 3.  Changes of QpeakQavg and N with time

    图 4  ${k_{{Q_{{\rm{peak}}}}}} $${k_{{Q_{{\rm{avg}}}}}} $kN随时间变化

    Figure 4.  Changes of ${k_{{Q_{{\rm{peak}}}}}} $${k_{{Q_{{\rm{avg}}}}}} $ and kN with time

    图 5  放电量随时间变化

    Figure 5.  Discharge output varing with time

    图 6  放电发展阶段PRPD谱图随时间演变

    Figure 6.  Time-dependent evolution of PRPD spectra in discharge development stage

    图 7  放电持续阶段PRPD谱图随时间演变

    Figure 7.  Time-dependent evolution of PRPD spectra in discharge duration stage

    图 8  临近击穿阶段PRPD谱图随时间演变

    Figure 8.  Time-dependent evolution of PRPD spectra in near-breakdown stage

    图 9  绝缘内部气隙放电机理

    Figure 9.  Mechanism of air-gap discharge in insulation

    图 10  Gaussian金字塔构建过程

    Figure 10.  Gaussian pyramid formation process

    图 11  多尺度下特征量随时间变化趋势

    Figure 11.  Change tendency of features with time in multi-scale

    表  1  Gaussian金字塔图像系列特征

    Table  1.   Characteristics of Gaussian pyramid image series

    序列纹理种类045°90°135°平均值
    level0ASM0.9210.9200.9200.9200.920
    ENT0.2570.2770.2650.2760.269
    CON0.0320.0810.0500.0750.059
    level1ASM0.5190.5140.5240.5120.517
    ENT1.8511.9061.8181.9081.871
    CON0.2550.2650.2470.2840.263
    level2ASM0.3620.3550.3560.3120.346
    ENT2.5472.2162.3472.4792.397
    CON0.9550.9540.9550.9550.953
    level3ASM0.3020.3000.3150.3000.304
    ENT2.4342.6552.0222.5842.424
    CON0.9961.2370.4941.2440.993
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出版历程
  • 收稿日期:  2020-04-04
  • 修回日期:  2020-08-13
  • 网络出版日期:  2020-10-09
  • 刊出日期:  2021-10-15

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