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291Vol29,No1西华大学学报(自然科学版)JournalofXihuaUniversityNaturalScience20101Jan.2010:1673159X(2010)01002304:20091112:(2006C026):(1984),,,,DSP杨霞1,谢维成1,林莉1,向平2(1,610039;2,638000):,,,DSPLabVIEW,,,LabVIEW,,:;DSP;FFT;LabVIEW:TM9352:ATheDesignofaPowerHarmonicAnalyzerBasedonDSPandVirtualInstrumentYANGXia1,XIEWeicheng1,LINLi1,XIANGPing2(1.SchoolofElectricalandInformationEngineering,XihuaUniversity,Chengdu610039;2.TransmissionandMaintenanceCenterofElectricPowerBureau,Guangan638000China)Abstract:Alargeamountofpowerharmonicisgeneratedduetotheincreaseofnonlinearloadinapowersystem.Thepowerharmonicisharmfultothepowersystemandinstrument.However,harmonicanalysislaysthefoundationforpowerharmonictreatment.ThepaperdiscussesthedevelopmentofapowerharmonicanalyzerbasedonDSPandLabVIEW,whichisusedtoanalyzeandmeasureharmoniconrealtime.Theanalyzershardware,harmonicanalysisalgorithm,LabVIEWsoftwaredesignandtheimplementationareallbroughtforwardindetai.lExperimentsshowthattheanalyzerhashighmeasurementaccuracy,goodrealtimeperformance,friendlymanmachineinterfaceandconvenientsystemextensionfeatures.Keywords:harmonicanalysis;DSP;pluralFFTalgorithm;LabVIEW0引言,,,,,DSP,,,1系统硬件总体结构,,,,,,DSPTMS320C6201B,,LabVIEW:111,A/D,2,2010,25kHz,,,,,MAX275[1],,075,3000Hz,2500Hz,1500Hz,30,1%1212A/D(ADC),ADC,,ADCLINEAR16ADCTLC160616,,,,A/D4s,,A/D,13,DSPTITMS320C6201B,TMS320C6201B33TMS320C6201BTMS320C6201B16,:CPUTMS320C6201BDMA4,,DMA,CPU,DMA;DMA,2DMAA/D,,A/D,A/D,,,A/D,,A/D,DMA,A/D,,CPU,,TMS320C6201B,DSP,,DSP,,,DSP,32,32,QSQQ,Q,,;,Q,,[2][3]FFT,,FFT241:DSP,Ng(n),g(n)x(n),:x(n)=xe(n)+jx0(n)=g(2n)+jg(2n+1)n=0:N/21(1)NFFTN/2FFTFFT,NFFTXe(k)=X(k)+X*(N2-k)2k=0:N/21(2)Xo(k)=X(k)-X*(N2-k)2k=0:N/21(3)FFTCCS,TMS320C6201BDSPFFT,C,,N128,256,512,102414,,PCLabVIEW2系统软件设计,,,44,,TMS32OC6201B,A/D,,A/D,DMA2,A/D,,,LabVIEW5,65LabVIEW25201063系统抗干扰设计DSP,,,;,;PCB,,DSPDSP,,4结论DSPLabVIEW,,,,,[1],,MAX275[J],2006(8):1314[2]TMS320C6201B[M][S.1]:,2001.[3],,,DSPFFT[J],2007,21(3):2832[4],,,[J],2007,23(101):258260[5]WorkingGroup3605Harmonics,CharacteristicParameters,MethodsofStudy,EstimatesofExistingValuesintheNetwork[J]CIGRE,Electra,1981(77):3554[6],LabVIEW[J],2004(12):1617(编校:陈立功)26