基于LS_SVM的电力电子电路故障预测方法

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15820118ELECTRICMACHINESANDCONTROLVol.15No.8Aug.2011LS-SVM121111.2100162.232001leastsquaressupportvectormachineLS-SVM。BuckLS-SVM。LS-SVM2%。TP206A1007-449X201108-0064-05ResearchonfaultpredictionmethodofpowerelectroniccircuitsbasedonleastsquaressupportvectormachineJIANGYuan-yuan12WANGYou-ren1CUIJiang1SUNFeng-yan11.CollegeofAutomationEngineeringNanjingUniversityofAeronauticsandAstronauticsNanjing210016China2.CollegeofElectricandInformationEngineeringAnhuiUniversityofScienceandTechnologyHuainan232001ChinaAbstractAimingattheissueoffaultpredictiontechniqueofpowerelectroniccircuitsamethodbasedoncharacteristicparameterdataandleastsquaressupportvectormachineLS-SVMforthepredictionofpowerelectroniccircuitswasproposed.TakingtheBuckconvertercircuitasanexamplethefaultpre-dictionofpowerelectroniccircuitswasachieved.Firstlytheoutputvoltagewasselectedasmonitoringsignalandthentheaveragevoltageandripplevoltagewereextractedascharacteristicparameters.LastlyLS-SVMalgorithmwasusedtopredictBuckconvertercircuit.TheexperimentalresultsshowthattheLS-SVMalgorithmisespeciallyaccurateinpredictingtheaveragevoltageandripplevoltagewiththerelativeerrorlessthan2%.Thenewmethodcantracethecharacteristicparameters’trendandcanbeeffectivelyappliedinfaultpredictionofpowerelectroniccircuits.KeywordspowerelectroniccircuitsfaultpredictioncharacteristicparameterdatadrivingleastsquaressupportvectormachineLS-SVM2010-07-24608710092009ZD52045CXLX11-0183NS20100631982—1963—、、1977—、1983—。0、1-2。3。、。4、5、63。、。、。、。7-9。leastsquaressupportvectormachineLS-SVMLS-SVM。11.1。。1Buck。1MOSFETIRF151f=50kHzD=0.22L=43μHD1MUR405C=220μFESRRL=1.25Ω。1BuckFig.1Buckconvertercircuit1BuckDC-DC。。Buck、。Buck。。2a。uo1UoNuoii。Uo=1N∑Ni=1uoi。1b。。-。、-Δu。1.2LS-SVMLS-SVMSVM1011supportvectormachineregressionSVR。LS-SVMxHilbert。SVMfx=wTx+bw∈Rnb∈R。2fx·568LS-SVMxwwTwbRnnR。supportvectorSV2minwbeJwe=12‖w‖2+γ∑ni=1e2iS.t.yi=wTxi+b+ei}。3eiγxix=x1…xi…xniyiy=y1…yi…yni。LagrangeLagrangeαiLwebα=Jwe-∑ni=1αiwTxi+b+ei-yi。4Karush-Kuhn-TuckerLS-SVMfx=∑ni=1αiKxix+b。5Kxy=xyMercer、、、Sigmoid。1.3LS-SVM。2①。、1h、5h、24h②③、④⑤LS-SVM⑥LS-SVM⑦。21BuckPspiceuoMatlab7.6LS-SVMlabBuck。2Fig.2Flowchartofthefaultprediction2.1Buck812CESR、L、MOSFETRds、Vthgm11。1Buck2。66151BuckTable1TheparametersofthecomponentsinBuck/hC/μFRESR/mΩL/μHRds/mΩVth/Vgm/μ1220512431.62.8320.5221852342.93.62.8520.4321553242.85.72.8720.3421254442.68.02.8920.2520855742.4112.9120.1620557042.2152.9320720058342192.9519.9819460841.7242.9719.7918962141.5293.019.51018363741.1343.0319.22Table2Thecharacteristicparametersdata/h/V/V15.1370.76825.1350.78235.1320.79345.1300.80955.1260.82565.1230.84275.1180.85885.1120.88995.1060.905105.1000.9282.2LS-SVM121~67712~7684。LS-SVMgam=1003。3LS-SVMBuck2%。UoΔu3、4。○+1~67~104。3、4LS-SVMBuck。3Table3Predictionresultsofcharacteristicparameters3Fig.3Predictioncurvesofaveragevoltage4Fig.4Predictedcurvesofripplevoltage2BuckBuck。0.5V10%1V。5.1378V768LS-SVM0.7V340.5V1V4h。3SVM。SVM。SVM。。、、。1gam2gamsig2RBF4。4Table4Predictioneffectofdifferentkernelfunction%%gam=100.06570.9419gam=1000.04890.8196gam=100sig2=100.05941.2189gam=1000sig2=500.02980.54344。。3LS-SVM。Buck。。1LALLPHANDEMBHATCetal.Prognosticshealthmonito-ringPHMforprior-damageassessmentinelectronicsequipmentunderthermo-mechanicalloadsC//ProceedingsofElectronicComponentsandTechnologyConferenceMay29-June12007NewYorkUSA.20071097-1111.2MAZhangshan.AnewlifesystemapproachtotheprognosticandhealthmanagementPHMwithsurvivalanalysisdynamichybridfaultmodelsevolutionarygametheoryandthree-layersurvivabil-ityanalysisC//ProceedingsofIEEEAerospaceConferenceMarch7-142009BigSkyMontanaUSA.20091-20.3ORSAGHRBROWNDROEMERM.Prognostichealthman-agementforavionicssystempowersuppliesC//ProceedingsofIEEEAerospaceConferenceMarch5-122005BigSkyMon-tanaUSA.20053585-3591.4.ARJ.200930191-95.LVKehongQIUJingLIUGuanjun.ResearchonlifeprognosismethodforelectronicsbasedondynamicdamageandoptimizationARmodelJ.ActaArmamentarii200930191-95.5.BPJ.200926152-54.ZOUXinyaoYAORuohe.LifepredictionofelectronicdevicesbasedonforecastsystemofbackpropagationneuralnetworkJ.MicroelectronicsandComputer200926152-54.6.LS-SVMJ.200621177-80.JIANGTianhanShUJiong.Multi-steppredictionofchaotictimeseriesusingtheleastsquaressupportvectormachineJ.ControlandDecision200621177-80.7AMARALACARDOSOA.UseofESRtopredictfailureofout-putfilteringcapacitorsinboostconvertersC//ProceedingsofIEEEInternationalSymposiumonIndustrialElectronicsMay4-72004NewYorkUSA.IEEE20041309-1314.8IMAMADIVANDHABETLERTetal.Real-timeconditionmonitoringoftheelectrolyticcapacitorsforpowerelectronicsappli-cationsC//ProceedingsofIEEEAppliedPowerElectronicsCon-ferenceandExpositionFebruary25-March12007NewYorkUSA.IEEE20071057-1061.9CHENYaow-MingCHOUHsu-WeiLEEKungyen.Onlinefail-urepredictionoftheelectrolyticcapacitorforLCfilterofswitching-modepowerconvertersJ.IEEETransactionsonIndustrialElec-tronics2008551400-406.10.J.2007271062-66.74861511LIUJunHUANGMengzhiWANGYang.Researchonvector-controlsystemofPMSMbasedoninternalmodelcontrolofcurrentloopC//SecondInternationalWorkshoponComputerScienceandEngineeringOctorber28-

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