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基于介电响应法的矿用电缆绝缘性能评估方法研究

雷志鹏 李蔚 何庆辉 门汝佳 王业 刘洋 吝伶艳

雷志鹏,李蔚,何庆辉,等. 基于介电响应法的矿用电缆绝缘性能评估方法研究[J]. 工矿自动化,2023,49(1):46-55.  doi: 10.13272/j.issn.1671-251x.18047
引用本文: 雷志鹏,李蔚,何庆辉,等. 基于介电响应法的矿用电缆绝缘性能评估方法研究[J]. 工矿自动化,2023,49(1):46-55.  doi: 10.13272/j.issn.1671-251x.18047
LEI Zhipeng, LI Wei, HE Qinghui, et al. Study on evaluation method of insulation performance of mine cable based on dielectric response method[J]. Journal of Mine Automation,2023,49(1):46-55.  doi: 10.13272/j.issn.1671-251x.18047
Citation: LEI Zhipeng, LI Wei, HE Qinghui, et al. Study on evaluation method of insulation performance of mine cable based on dielectric response method[J]. Journal of Mine Automation,2023,49(1):46-55.  doi: 10.13272/j.issn.1671-251x.18047

基于介电响应法的矿用电缆绝缘性能评估方法研究

doi: 10.13272/j.issn.1671-251x.18047
基金项目: 国家自然科学基金项目(51977137);山西省重点研发计划项目(202102040201001);山西省“1331”工程项目(晋教科〔2017〕 10号)。
详细信息
    作者简介:

    雷志鹏(1983—),男,山西太原人,副教授,博士,主要研究方向为矿用智能电器和电气绝缘性能评估,E-mail:leizhipeng@163.com

  • 中图分类号: TD611

Study on evaluation method of insulation performance of mine cable based on dielectric response method

  • 摘要: 矿用高压电缆在实际使用中易受电、热、机械应力等多种因素的复合作用,加速绝缘老化,易导致电缆漏电、短路或放电等故障。目前,介电响应法被引入矿用电缆绝缘性能及老化状态的分析、评估和诊断中。针对基于介电响应法的电缆绝缘性能及老化状态评估问题,以常用的三元乙丙橡胶(EPDM)绝缘矿用移动软电缆为研究对象,总结了介电响应法中回复电压法、极化/去极化电流法和频域介电谱法的基本原理和典型特征量,对比了3种方法的优缺点。介绍了扩展Debye模型提取的老化因子、修正介电驰豫模型提取的弛豫特征量、介质损耗积分谱等基于介电响应模型的电缆绝缘性能评估特征量。从基于回复电压法和极化/去极化电流法的矿用电缆电痕腐蚀程度判别,以及基于极化/去极化电流法和等温松弛电流、基于介电驰豫模型、基于介质损耗积分值的EPDM绝缘多应力老化状态评估等方面,综述了介电响应法在矿用电缆绝缘性能评估中的应用研究。针对基于介电响应法的矿用电缆绝缘性能评估存在的在线监测技术无法适应煤矿工况、评估用数据不足、绝缘劣化程度与特征量关系未知等问题,提出应重点研究电缆绝缘状态感知、绝缘劣化程度与特征量关系构建这2项关键技术。

     

  • 图  1  RVM原理

    Figure  1.  Return voltage method(RVM) principle

    图  2  PDC法原理

    Figure  2.  Polarization and depolarization current(PDC) method principle

    图  3  FDS法原理

    Figure  3.  Frequency-domain dielectric spectroscopy(FDS) method principle

    图  4  扩展Debye模型

    Figure  4.  Extend Debye model

    图  5  因电痕腐蚀引发故障的矿用电缆接头

    Figure  5.  Mine-used cable's joint with failure caused by electrical tracking corrosion

    图  6  不同电痕腐蚀程度的电缆绝缘用EPDM去极化电流

    Figure  6.  Depolarization current of ethylene propylene diene monomer(EPDM) for cable insulation with different corrosion degree of electrical tracking

    图  7  不同电痕腐蚀程度的电缆绝缘用EPDM回复电压

    Figure  7.  Return voltage of EPDM for cable insulation with different corrosion degree of electrical tracking

    图  8  多因素作用老化的EPDM极化电流和去极化电流

    Figure  8.  Polarization and depolarization currents of EPDM aged under multi factors

    图  9  EPDM的双弛豫Cole−Cole模型特征量

    Figure  9.  Characteristic parameters of double relaxation Cole-Cole model of EPDM

    图  10  不同老化时间下EPDM介质损耗积分值

    Figure  10.  Dielectric loss integral value of EPDM under different aging time

    表  1  介电响应法优缺点

    Table  1.   Advantages and disadvantages of dielectric response methods

    方法优点 缺点
    RVM 无损检测,易于现场测量,抗干扰能力强 易受电荷积聚影响,测量
    时间较长
    PDC法 无损检测,能分辨出电导
    极化现象
    易受现场干扰,高频信息
    损失严重,初始电流难以
    测量
    FDS法 无损检测,不受电荷积聚
    影响,信息丰富
    低频测量时间长,测量电
    压低
    下载: 导出CSV

    表  2  交联聚乙烯电缆绝缘状态评估用典型老化因子

    Table  2.   Typical aging factors for estimating insulation performance of XLPE cable

    电缆绝缘状态老化因子
    非常好0~1.75
    中年1.75~1.90
    老化严重1.90~2.10
    劣化>2.10
    下载: 导出CSV

    表  3  电缆绝缘电阻

    Table  3.   Insulation resistances of cable

    试样R/GΩR'/GΩ误差/%
    EPDM0360.93357.16
    EPDM1234.32225.26
    EPDM2142.01382.82
    EPDM3125.51271.17
    下载: 导出CSV

    表  4  不同老化时间下EPDM老化因子

    Table  4.   Ageing factors of EPDM under different ageing time

    老化时间/h015304560
    老化因子2.022.202.632.926.24
    下载: 导出CSV

    表  5  EPDM的Havriliak−Negami模型特征量

    Table  5.   Characteristic parameters of Havriliak-Negami model of EPDM

    老化时间/hχsτ/sσ0/
    (10−15 S·m−1)
    σH/
    (10−12 S·m−1)
    00.020.9301.290.85
    2000.280.0054.932.81
    4000.520.0704.964.99
    6001.101.03013.517.8
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-10-18
  • 修回日期:  2022-12-30
  • 网络出版日期:  2023-01-17

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