采用时频矩阵奇异值分解的配电开关振动信号特征量提取方法.pdf

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1、第34卷第28期中国电机工程学报Vo1．34No．28Oct．5，201449902014年10月5曰ProceedingsoftheCSEE~2014Chin．Soc．forElec．EngDOh10．133348．0258-8013．pcsee．2014．28．028文章编号：0258—8013(2014)28—4990-08中图分类号：TM77采用时频矩阵奇异值分解的配电开关振动信号特征量提取方法郭谋发，徐丽兰，缪希仁，陈立纯2(1．福州大学电气工程与自动化学院，福建省福州市350108；2．福建省晋江市电力有限责任公司，福建省泉州市362200)AVibrationSign

2、alFeatureExtractionMethodforDistributionSwitchesBasedonSingularValueDecompositionofTime-frequencyMatrixGOUMoufa，XULilan，MIAOXiren，CHENLichun(1．CollegeofElectricalEngineeringandAutomation，FuzhouUniversity，Fuzhou350108，FujianProvince，China；2．FujianJinjiangElectricPowerCompanyLimited，Quanzhou3622

3、00，FujianProvince，China)ABSTRAC1Vibrationsignalsofdistributionswitchesthat得到的时频矩阵奇异值作为振动信号的特征量，用于表征配containmechanicalinformationarecharacterizedby电开关的机械状态。对配电开关在正常及卸掉A相触头绝nonlinearityandnonstationarity．Therefore，basedonthe缘拉杆、机械结构卡涩、底座螺丝松动等3种典型故障情况singularvaluedecompositionoftime·frequencymatr

4、ix，a下实测振动信号的时频矩阵奇异值做模糊c均值聚类，结果vibrationsignal~atureextractionmethodfordistribution表明该特征量能够准确、有效地表征配电开关的机械状态。switcheswasproposed．Hilbert-Huangtransform(HHT)band·-passfilterwasusedtoconstructthetime·frequency关键词：配电开关；振动信号；特征量提取；时频矩阵；奇matrixforthevibrationsigna1．Afterthesingularvalue异值分解；HHT带通滤波；

5、模糊C均值聚类decomposition(SVD)ofthetime—frequencymatrix，the0引言characteristicinformationofthevibrationsignalwouldbedecomposedintodiferenttime-frequencysubspaces，SOwecan统计分析表明，约80％的开关故障是由于机械gettime-frequencymarxsingularvaluesasthefeature特性不良造成的，且绝大多数故障是操动机构的问quantities，thefeaturequantitieswouldrepres

6、entthe题u】。中压配电开关分、合闸操作所产生的振动信mechanicalstateofdistributionswitches．Fuzzyc-mean(FCM1clusteringwasappliedtothesetime-frequencymatrixsingular号蕴含有机械状态信息，开关机械状态的改变将导valuesofvibrationsignalswhichwasmonitoredinnormal致振动信号的变化，因此，配电开关振动信号的有statesandthreekindsoftypicalmalfunctionsincluding效特征量可用于机械状态的识别

7、。relievedinsulatedpullrodofphaseAcontacts，mechanical配电开关振动信号属于瞬时非线性、非平稳信structureclampingstagnationstatesandscrewloosingstates．Theresultshowsthatthefeaturequantitycanrepresentthe号，不具有周期性，且由于开关操动机构内部各构mechanicalstateofdistributionswitche