超声波法检测GIS局部放电的研究

上海交通大学硕士学位论文超声波法检测GIS局部放电的研究姓名：陈宏福申请学位级别：硕士专业：高电压与绝缘技术指导教师：曾奕20080101GasInsulatedSwitchgearGISGIS1GIS2GIS3GIS4GIS5GISGISGISGISABSTRACTMeasurementofpartialdischarge(PD)isanimportantmeansofmonitoringtheinsulationconditionandimprovingthereliabilityofpowerequipments.WithregardtoGasInsulatedSwitchgear(GIS),investigationofacousticbasedPDdetectionsystemwascarriedout.Inthedissertation,followingresearchinthePDon-linedetectionsystemwascovered.1.PresentstatusofPDdetectioninGISwasreviewed;2.AcousticbasedPDdetectionschemewasproposed;3.DesignandrealizationofthehardwareofacousticbasedPDdetectionsystem,includingacousticemissionsensor,pre-amplifier,dataacquisitionsystem,etc;4.DesignofthesoftwareofacousticbasedPDdetectionsystem,includingtheframeofthesoftware,flowchartofsignalprocessing,PDevaluationrules,etc;5.ConstructionofPDdetectionset-upinthelaboratory,includingGISexperimentmodel,artificialdefect,testingequipments,etc.Attheendofthisdissertation,asystematicalsummaryisgiven.Furtherworktotheresearchispointedout.KEYWORDS:GIS,Partialdischarge,Ultrasonic,Patternrecognition20084820084820084811.1GISGISSF6SF6[1]GISGISGISGISSF6GIS20%40%[2]GISGISGISGIS[3]GISGISGISGIS21.2GISGIS[4]1,UVSF6[5]GISGIS2SF6SOF2SO2F2,,1ppm[5][3]3GIS20250kHz,GIS(AE)10GIS3GISGIS4IEC60270IEC1981GIS40kHz1MHzGISGISGIS[5]5UHF2080CEGBUHFGISUHF(300MHz3GHz)UHF500MHz102dB/m,(510m),GISCIGRE1UHF2UHF3GIS[5]UHF1-1GIS41-1GIS5pC0.5~0.8pC2pC0.1m1.3GISGIS1995-1997UHF330kVGIS1998HP8720C20GHz[6]StrathclydeNGCScottishPowerplcUHFVFTOUHF3UHF5ZurichNeuholdGISGISTransiNorAsSchei[7]2001ToshihiroHoshinoGISSF6SF6[8]Arakelian2000SF6O2N2CF4[9]Kawada2000(E-M)GaborFM(120:200MHz)(2080MHz)[10]2002KawadaUHF(UWB-VURIS)[11]E-M6[11]2000StrathclydeJudd(FDTD)EH[12]1.4pCGISGISGISGISGIS:1GISGISGISGIS[13]2GIS,XX[14]7[15]XX--380[16][17]4[18][19][16]1.5GISGIS8GIS1GIS2GIS3GISGIS9GIS2.1[20]GIS2-1[21]GISGIS2-1GISFig.2-1SeveralinsulationdefectsinsideGIS1(VFTO)2GIS103GIS104GISGIS2.22.2.1[22]2-2CL[23]GIS112-2Fig.2-2PDequivalentcircuit2-20costiietδω−+=2-10i+maxi00221()2uiLRLRLCLωδω+===−2-22.2.2[24]2-3iGIS122-3Fig.2-3DischargeequivalenttestcircuitCaCbCcCcCbCaLcRcC0L0R02-4S2-4SFig.2-4PDS-domaintestequivalentcircuit12,abcacbUUUCCC−=??2-3GIS13/()1()/1()cbacccabcabcbaccccUSCUaUsSCSCSLRSCCSCCCUSCUaSCSCSLRSC=+×+++≅+×++2-41()111()1()1()111()ccabccaccabccSLRSCSCSCSLRSCZSSCSLRSCSCSCSLRSC×+×+×+=≅×+++×+2-50aUU=I(S)000000022000/()()11111()()(1)(1)acbcccacacbaccccaaUSUSISSLRSCSCUCSCSLRSCSLRSCSCSCUCCSLCSRCSLCSRCC−=+++×=×++××+++×=++×+++2-6UcCbabUC×aqS22000()(1)(1)aaccccaaqISCSLCSRCSLCSRCC=++×+++2-7I(S)SGIS1421220003400001()22()22ccccccaaRRpLLLCRRCCpLLLCC=−±−+=−±−2-83124123400()()ptptptptaccqitkekekekeLCLC=+++2-9RcR0:00002()2cccaaLRCLCCRCC+2-10,i(t),:2211132200()||cos()||cos()ttaccqitketketLCLCδδωθωθ−−=+++2-11GIS15122222111111212211111322222222221211120202002022222212112121()421()221(2)42()222ccccccacackRLRLCLarctgkRLCCRLCCLarctgωδωδωδωδωθδωωδωδδδωδωδωδωδδδωθδω=++==−+==+−+−+=+=−+−+−=2-122.3bCÄcubcacCuuC=VV2-13ÄcuÄaubCGIS16acbaqCCu=V2-14caaacacabacaCuqqqCqCuCqC≅==VV2-15aqCcÄuaX22111()ccCLδω=+2-16cLiH1ωGHzpF,,10ìH11δω1δ1ωMHzCc2211100000010000010cCωω==2-171ωMHz2-151316aaquqω=V2-18aqÄau1ωFFTaqpCÄauV1ωMHz,pC2.4GIS17qϕiueu1(q),(pC)2ϕϕ3/s4iukViu5eueuiueuiueu2.5GIS[25]--GIS182.5.1--[26]--MmmdvFMdt=2-19FvMmCm1mFCξ=2-20FξCmRmmFRv=2-21GIS192-1--FvRm2-12.5.2GISrqMmFeFq2-17ansusCmRmMm2-17bMmCm,Rm-2-18MmCmRm[27]220ccmmmmcduduLCRCudtdt++=2-22GIS20ab2-172-18Fig.2-17BubbleforceanalysisFig2-18.Mechanicalequivalentcircuit:2LRC2-23uc,,uc00sin()tcUuetδωωβω−=+2-242mmRLδ=21()2mmmmRLCLω=−220ωδω=+arctgωβδ=qECmU00eUUqE==2-252-242-25GIS212.6GIS2.6.1,GIS2-4,[28],,,SF6,,[29],GIS,,2-4Fig.2-4Soundtransmissionpath2.6.2,SF6,,100dBm40kHzSF626dBm[30],GIS22[31]2.6.3,,,60%,,SF6156m/s[30],GIS,,,,,GIS,GIS[30]2-52-62mmMHz,na:nnb:n2-5Fig.2-5WavemodesinplatesphCλ,:/phCfλ=2-26f,GIS23,SF6λ/sinλλϕ=2-27ϕϕ2-7[32][29]ab)2-6:S0S1S2;a0a1a2Fig.2-6TherelationshipbetweenPhasevelocity,wavegroupvelocityandthefrequencyGIS242-7Fig.2-7Planewaveexcitationofaflexuralwaveinaplate253.1DSPARM3-1GIS50GISGIS3-1ARMDSPGISDSPARMGIS3-1Figure3-1StructureofPDmonitoringsystemDSP26GISDSPTIDSPTMS320C6713A/DDSPSDRAMA/D12bit105MAD105MHz20MHz20ARM3.23.2.1,V(t,x)U(x,t)T(t)[33](),(0100MHz),(≤1014m)[34]PZT-51200f27t0.5Vft0.5V3.2.21,,10:14m,,501000KHz2,,KHzMHz,,AE1045S3,,4,56:,78NBS,,92810Michelson,1112Curie-200+5401314,,1516,,17,18,20kHz,293.2.3[35]abab3-2Fig.3-2PiezoelectricresonantsensorsstructurePZT-5519um3.2.4PACPACPAC85%PAC,,20dB,40dB,60dB,,PAC(,)40dB20300kHz3-3303-3PACFig.3-3PACultrasonicsensorsdetectedpartialdischargewaveforms3-4150kHz,S/N3-4Fig.3-4PDSpectrum311,,2GIS,[36],,20110kHz30kHz[37]30kHzPAC,Vallen3-1323-1(kHz)V/(m/s)[V/ubar](dB)PACD9241A20–1803080[-70]S9208201000500[500]45[-85]R15α50-20070[150]69[-63]R3α25-53029[140]80[-63]CH15I50-20075[150]109[-22]CH30I125-450300[350]97[-23]PXR0320-1103075PXR0430-1404080AE303S30±20%753AE503S50±20%7531045S100-1300513SR5020-1105075SR15070-40015065VALLENVS75-SI-40dB30-120VS45-H20-