Article(id=1210577663060742979, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1210577662121209865, articleNumber=null, orderNo=null, doi=10.16790/j.cnki.1009-9239.im.2024.08.016, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1688400000000, receivedDateStr=2023-07-04, revisedDate=1694707200000, revisedDateStr=2023-09-15, acceptedDate=null, acceptedDateStr=null, onlineDate=1766553806318, onlineDateStr=2025-12-24, pubDate=1724083200000, pubDateStr=2024-08-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1766553806318, onlineIssueDateStr=2025-12-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1766553806318, creator=13701087609, updateTime=1766553806318, updator=13701087609, issue=Issue{id=1210577662121209865, tenantId=1146029695717560320, journalId=1149653034449285133, year='2024', volume='57', issue='8', pageStart='1', pageEnd='147', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1766553806095, creator=13701087609, updateTime=1766563971278, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1210620298043454173, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1210577662121209865, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1210620298043454174, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1210577662121209865, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=130, endPage=137, ext={EN=ArticleExt(id=1210577663324984133, articleId=1210577663060742979, tenantId=1146029695717560320, journalId=1149653034449285133, language=EN, title=A method for discriminating defect length and type of cable based on attenuation intensity evaluation of frequency domain reflected signal, columnId=1192878364340924664, journalTitle=Insulating Materials, columnName=Test and Analysis, runingTitle=null, highlight=null, articleAbstract=
To solve the problem that frequency domain reflectometry (FDR) can only distinguish defect polarity and cannot identify the defect length and type, a defect type discrimination method was proposed on the basis of signal attenuation intensity evaluation in this paper. The difference between the total refracted reflection intensity at each defect and the initial reflection intensity was calculated, and then the defect length and type can be discriminated by comparing the magnitude of difference. Combined with the polarity judgment method, the defect can be subdivided into four types. The results show that the method proposed in this paper can successfully identify the length and type of four common defects in cables, including grounding faults, excessive bending, cable body moisture, and long intermediate joints of cables, and the recognition results are consistent with the simulation modeling results. The defect type discrimination method in this paper can identify the common point defects and segment defects in cables.
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为解决频域反射法(FDR)只能判别缺陷极性而不能识别缺陷长度和类型的问题,本文提出了一种基于信号衰减强度评估的缺陷类型判别方法,通过利用各缺陷处总的折反射强度与首次反射强度作差,再利用差值的大小即可对缺陷的长度和类型做出判断,并结合极性判断方法将缺陷细分为了4种类型。结果表明:本文所提方法可成功识别电缆中常见的接地故障、过度弯折、本体受潮及长电缆中间接头4种缺陷的长度和类型,且与仿真建模的结果一致。本文缺陷类型判别方法可对电缆常见的点缺陷和段缺陷进行识别。
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唐作鑫(1998-),男(汉族),四川成都人,硕士生,研究方向为电力设备状态监测;
周凯(1975-),男(汉族),四川宜宾人,教授,研究方向为电缆绝缘检测及修复等。
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唐作鑫(1998-),男(汉族),四川成都人,硕士生,研究方向为电力设备状态监测;
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周凯(1975-),男(汉族),四川宜宾人,教授,研究方向为电缆绝缘检测及修复等。
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Reflection coefficient model of intact cable, figureFileSmall=xqHc0Chp4DON19t2DRw6wQ==, figureFileBig=312FNmZhOS2yYHFdtoEuRQ==, tableContent=null), ArticleFig(id=1218111681109087051, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=CN, label=图1, caption=
完好电缆反射系数模型, figureFileSmall=xqHc0Chp4DON19t2DRw6wQ==, figureFileBig=312FNmZhOS2yYHFdtoEuRQ==, tableContent=null), ArticleFig(id=1218111681218138960, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=EN, label=Fig.2, caption=
Reflectance coefficient model of cable with single point fault, figureFileSmall=31Bvq15LPCS7789EeCFL5w==, figureFileBig=sl3ShkiuD8DIx/Py9iN4fQ==, tableContent=null), ArticleFig(id=1218111681293636440, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=CN, label=图2, caption=
含单个点故障电缆的反射系数模型, figureFileSmall=31Bvq15LPCS7789EeCFL5w==, figureFileBig=sl3ShkiuD8DIx/Py9iN4fQ==, tableContent=null), ArticleFig(id=1218111681385911134, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=EN, label=Fig.3, caption=
Cable reflection coefficient model with joint or body affected with moisture, figureFileSmall=YAfYMZc8GoyUW2TnLytzog==, figureFileBig=/013Zz91o7P10hAt0FmCpQ==, tableContent=null), ArticleFig(id=1218111681465602919, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=CN, label=图3, caption=
接头受潮或本体受潮的电缆反射系数模型, figureFileSmall=YAfYMZc8GoyUW2TnLytzog==, figureFileBig=/013Zz91o7P10hAt0FmCpQ==, tableContent=null), ArticleFig(id=1218111681557877613, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=EN, label=Fig.4, caption=
Variation curves of defect amplitude and amplitude of end under different r values, figureFileSmall=7XiXEmjPIyOJcQ2rcXx5iQ==, figureFileBig=q+RFctG2AwRHV9nFgFNpeA==, tableContent=null), ArticleFig(id=1218111681679512437, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=CN, label=图4, caption=
不同r值下缺陷处幅值及末端处幅值的变化曲线, figureFileSmall=7XiXEmjPIyOJcQ2rcXx5iQ==, figureFileBig=q+RFctG2AwRHV9nFgFNpeA==, tableContent=null), ArticleFig(id=1218111681755009914, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=EN, label=Fig.5, caption=
The relationship curves between d and defect distance x, ratio r, figureFileSmall=YDxZ33jL+DlHXcxEpAPbxQ==, figureFileBig=qtGReUNHKDwCEMu6+DEPjA==, tableContent=null), ArticleFig(id=1218111681834701695, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=CN, label=图5, caption=
判定阈值d与缺陷距离x及比值r的关系曲线, figureFileSmall=YDxZ33jL+DlHXcxEpAPbxQ==, figureFileBig=qtGReUNHKDwCEMu6+DEPjA==, tableContent=null), ArticleFig(id=1218111681910199171, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=EN, label=Fig.6, caption=
Flow chart of cable defect identification method, figureFileSmall=HTt0z8ar61OE1sZ5w9Ea/A==, figureFileBig=PZpOwz0ddZpYoWqA63b6DA==, tableContent=null), ArticleFig(id=1218111681977308042, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=CN, label=图6, caption=
电缆缺陷识别方法流程图, figureFileSmall=HTt0z8ar61OE1sZ5w9Ea/A==, figureFileBig=PZpOwz0ddZpYoWqA63b6DA==, tableContent=null), ArticleFig(id=1218111682065388431, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=EN, label=Fig.7, caption=
Comparison of defect localization results and their reflection intensity spectra between two identification methods, figureFileSmall=2V0B3WqrIzy2aXtSVpx5Mw==, figureFileBig=SPJnMkswineLAOc/XPsKSA==, tableContent=null), ArticleFig(id=1218111682195411860, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=CN, label=图7, caption=
两种识别方法的缺陷定位结果及其反射强度谱的对比, figureFileSmall=2V0B3WqrIzy2aXtSVpx5Mw==, figureFileBig=SPJnMkswineLAOc/XPsKSA==, tableContent=null), ArticleFig(id=1218111682279297941, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=EN, label=Fig.8, caption=
Cable test platform, figureFileSmall=M8uSJuYcxqo5u6ulkGwKwQ==, figureFileBig=+Wf5KtHZKLZNWV9jDVIudg==, tableContent=null), ArticleFig(id=1218111682363184027, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=CN, label=图8, caption=
电缆测试平台, figureFileSmall=M8uSJuYcxqo5u6ulkGwKwQ==, figureFileBig=+Wf5KtHZKLZNWV9jDVIudg==, tableContent=null), ArticleFig(id=1218111682468041630, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=EN, label=Fig.9, caption=
27 m coaxial cable sample, figureFileSmall=Kz1mioSAzvRxA9ATZIzZIw==, figureFileBig=nPszOj/wxMXX2ZvkHFrOHQ==, tableContent=null), ArticleFig(id=1218111682598065060, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=CN, label=图9, caption=
27 m同轴电缆试样, figureFileSmall=Kz1mioSAzvRxA9ATZIzZIw==, figureFileBig=nPszOj/wxMXX2ZvkHFrOHQ==, tableContent=null), ArticleFig(id=1218111682702922671, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=EN, label=Fig.10, caption=
Comparison between the new reflection intensity spectrum and the original reflection intensity spectrum of coaxial cable sample, figureFileSmall=qw/0GTZP3vtpxKbEcMnF+g==, figureFileBig=BZBpajqPuRptqYcHKXCJ9g==, tableContent=null), ArticleFig(id=1218111682778420150, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=CN, label=图10, caption=
同轴电缆试样的新反射强度谱与原反射强度谱对比图, figureFileSmall=qw/0GTZP3vtpxKbEcMnF+g==, figureFileBig=BZBpajqPuRptqYcHKXCJ9g==, tableContent=null), ArticleFig(id=1218111682858111931, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=EN, label=Fig.11, caption=
Comparison between the new reflection intensity spectrum and the original reflection intensity spectrum of 20 m power cable sample, figureFileSmall=/6ZXWyE4ErVtHljME8/iMA==, figureFileBig=T+s5qcRLGvBltLzt/OQTMg==, tableContent=null), ArticleFig(id=1218111682921026497, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=CN, label=图11, caption=
20 m 电力电缆试样的新反射强度谱与原反射强度谱对比图, figureFileSmall=/6ZXWyE4ErVtHljME8/iMA==, figureFileBig=T+s5qcRLGvBltLzt/OQTMg==, tableContent=null), ArticleFig(id=1218111682996523976, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=EN, label=Fig.12, caption=
Comparison between the new reflection intensity spectrum and the original reflection intensity spectrum of 500 m power cable sample, figureFileSmall=t+S/8F6KiWDC9DZXz5HsZQ==, figureFileBig=gE5tEvKKTGMyP8Hf+CBgDg==, tableContent=null), ArticleFig(id=1218111683113964491, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=CN, label=图12, caption=
500 m电力电缆试样的新反射强度谱与原反射强度谱对比图, figureFileSmall=t+S/8F6KiWDC9DZXz5HsZQ==, figureFileBig=gE5tEvKKTGMyP8Hf+CBgDg==, tableContent=null), ArticleFig(id=1218111683176879054, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=EN, label=Table 1, caption=
Evaluation and analysis of defect signal attenuation, figureFileSmall=null, figureFileBig=null, tableContent=
| 预设缺陷 | A′x/Ax | 信号衰减强度评估结果 | 类型判断 | 极性 | 缺陷类型 |
|---|
| 中间接头 | 0.88 | >1/3 | 段缺陷 | 正 | 正极性段缺陷 |
| 接地故障 | 0.19 | <1/3 | 点缺陷 | 负 | 负极性点缺陷 |
), ArticleFig(id=1218111683269153750, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=CN, label=表1, caption=
缺陷信号衰减强度评估分析
, figureFileSmall=null, figureFileBig=null, tableContent=
| 预设缺陷 | A′x/Ax | 信号衰减强度评估结果 | 类型判断 | 极性 | 缺陷类型 |
|---|
| 中间接头 | 0.88 | >1/3 | 段缺陷 | 正 | 正极性段缺陷 |
| 接地故障 | 0.19 | <1/3 | 点缺陷 | 负 | 负极性点缺陷 |
), ArticleFig(id=1218111683336262616, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=EN, label=Table 2, caption=
Defect type judgment results of coaxial cable sample, figureFileSmall=null, figureFileBig=null, tableContent=
| 预设缺陷 | A′x/Ax | 信号衰减强度评估结果 | 类型判断 | 极性 | 缺陷类型 |
|---|
| 接地故障 | 0.31 | <1/3 | 点缺陷 | 负 | 负极性点缺陷 |
| 过度弯折 | 0.25 | <1/3 | 点缺陷 | 正 | 正极性点缺陷 |
), ArticleFig(id=1218111683516617695, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=CN, label=表2, caption=
同轴电缆试样的缺陷类型判别结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 预设缺陷 | A′x/Ax | 信号衰减强度评估结果 | 类型判断 | 极性 | 缺陷类型 |
|---|
| 接地故障 | 0.31 | <1/3 | 点缺陷 | 负 | 负极性点缺陷 |
| 过度弯折 | 0.25 | <1/3 | 点缺陷 | 正 | 正极性点缺陷 |
), ArticleFig(id=1218111684787491816, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=EN, label=Table 3, caption=
Defect type judgment results of power cable sample, figureFileSmall=null, figureFileBig=null, tableContent=
| 预设缺陷 | A′x/Ax | 信号衰减强度评估结果 | 类型判断 | 极性 | 缺陷类型 |
|---|
| 本体受潮 | 0.78 | >1/3 | 段缺陷 | 负 | 负极性段缺陷 |
), ArticleFig(id=1218111684921709548, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=CN, label=表3, caption=
电力电缆试样的缺陷类型判别结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 预设缺陷 | A′x/Ax | 信号衰减强度评估结果 | 类型判断 | 极性 | 缺陷类型 |
|---|
| 本体受潮 | 0.78 | >1/3 | 段缺陷 | 负 | 负极性段缺陷 |
), ArticleFig(id=1218111685034955762, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=EN, label=Table 4, caption=
Defect type judgment results of 500 m power cable sample, figureFileSmall=null, figureFileBig=null, tableContent=
| 预设缺陷 | A′x/Ax | 信号衰减强度评估结果 | 类型判断 | 极性 | 缺陷类型 |
|---|
| 中间接头 | 0.71 | >1/3 | 段缺陷 | 正 | 正极性段缺陷 |
), ArticleFig(id=1218111685144007668, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210577663060742979, language=CN, label=表4, caption=
500 m电力电缆试样的缺陷类型判别结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 预设缺陷 | A′x/Ax | 信号衰减强度评估结果 | 类型判断 | 极性 | 缺陷类型 |
|---|
| 中间接头 | 0.71 | >1/3 | 段缺陷 | 正 | 正极性段缺陷 |
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