1392023年2月/February2023echnicalColumnT技术专栏摘要：铅封是保护电缆接头部位的重要部件。为确保铅封的有效性，基于涡流技术设计了一种高压电缆铅封缺陷识别方法，并展开仿真分析。首先，设置一个含噪声的一维涡流检测信号，基于离散傅里叶变换得到频域信号，对所得数据进行多项式拟合，利用去噪的方式对涡流检测数据实施预处理。然后基于涡流技术设计电缆铅封缺陷判别方法，训练缺陷识别分类器，通过求解凸二次规划得到最优分类决策函数，结合分类结果设计缺陷识别算法。仿真实验中，高压电缆铅封中分别模拟感应电流与感应磁场的分布情况。结果显示，该方法的识别准确率始终保持在87.0%以上，其在无缺陷以及缺陷深度大于1mm时的识别精度在95%左右，可见该方法识别精度较高。关键词：涡流技术；高压电缆；高压电缆铅封；缺陷识别；仿真实验；数据去噪中图分类号：TN06文献标识码：A文章编号：1004-7204(2023)02-0139-07基于涡流技术的高压电缆铅封缺陷识别仿真研究SimulationStudyonIdentificationofLeadSealingDefectsofHighVoltageCableBasedonEddyCurrentTechnology苗堃，陈垒，李沛东，赵亚军，李健，郑城市，张胜利（国网河南省电力公司济源供电公司，济源459000）MIAOKun,CHENLei,LIPei-dong,ZHAOYa-jun,LIJian,ZHENGCheng-shi,ZHANGSheng-li(StateGridHenanElectricPowerCompanyJiyuanpowersupplycompany,Jiyuan459000)Abstract：Leadsealisanimportantparttoprotectcablejoints.Inordertoensuretheeffectivenessofleadsealing,aleadsealingdefectidentificationmethodforhigh-voltagecablesisdesignedbasedoneddycurrenttechnology,andsimulationanalysisiscarriedout.First,setaone-dimensionaleddycurrenttestingsignalwithnoise,obtainthefrequencydomainsignalbasedondiscreteFouriertransform,performpolynomialfittingontheobtaineddata,andpreprocesstheeddycurrenttestingdatabydenoising.Then,basedoneddycurrenttechnology,amethodforidentifyingcableleadsealdefectsisdesigned,andadefectrecognitionclassifieristrained.Theoptimalclassificationdecisionfunctionisobtainedbysolvingconvexquadraticprogramming,andadefectrecognitionalgorithmisdesignedbycombiningtheclassificationresults.Inthesimulationexperiment,thedistributionofinducedcurrentandinducedmagneticfieldintheleadsealofhigh-voltagecablearesim...
