基于DSP电力谐波测量装置的设计－硬件设计毕业设计

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1、毕业设计基于DSP电力谐波测量装置的设计－硬件设计摘要为了能够对电网的运行状况进行监测，本文提出采用DSP技术设计一种电力系统谐波监测仪。该谐波监测仪被安装在检测现场，对电网电压和电流采样信号进行FFT等数学运算和处理，而且可以对数据进行存储、查询，并且在液晶上显示操作菜单等。监测仪能够完成包括三相电压、三相电流的频率、功率因数以及7以的谐波、谐波相位、谐波畸变率等的测量。论文重点介绍了以下几部分:(1)电路的总体设计和功能;(2)硬件设计，包括A/D转换、锁相环、液晶显示和按键输入等原理和电路；(3)系统测试。关键词:谐波监测，快速傅立叶变换，TMS320LF2

2、407A，数字信号处理IIITheExplorationofHarmonicMonitoringApparatusforpowerSystemBasedonDSPAbstractInrecentyears，withthewideapplicationofvariouskindsofnon一linerloads，theharmonicPollutionofelectricnetismoreandmoreseriousandthequalityofelectricPowerisdeclining.Iftheharmoniccan’tbecontrolled，itwil

3、laffectthewholeelectricnetrunningsafeandeconomical.So，itisnecessarytopreventtheharmonicPerilandtoassuresaferunningofthepowersystemwithdetectingaccurateharmoniccontentandpredominatingharmonicpracticestatusfirmly.Firstly，thepapergenerallyintroducesthetheoryoftheharmonicanalysisalgorithm

4、.Thereinto，therearedifficultiesinperformingsynchronizedsamplingandintegralperiodtruncationfortheharmonicanalysisinthePowersystemwiththeFastFourierTransform(FFT)，theresultoftheelectricpowerharmonicdetectionisdisturbedbythefrequencyleakage，sotheWindow-interpolationFFTisintroduced.Thispa

5、peranalyzesanddeducestheWindow一interpolationFFTalgorithmindetail，thenanalyzesthealgorithmbymatlabsimulation.Thesimulationresultshaveverifiedtheeffectivenessandpracticabilityofthealgorithm.Secondly，thepaperusestheDSPprocessorchipTMS320LF2407Aashardwarecoreandgivesdetectionsystem’shardw

6、aredesignindetail，suchassignalgatheringpart，A/Dconvertingpart，liquidcrystaldisplayingPart，datacommunicationpartandsoon.Finally，thedissertationfinishesthemainsoftwaredesignandgivescorrespondingmodule’sprocedureprocess.Thesoftwareofharmonicdetectionalgorithmhasbeendebuggedinlaboratory.T

7、hepracticalsimulatinghasProvedthattheanalysisofthetheoryiscorrect，thereal-timecharacterandaccuracycanmeettherequirementofharmonicdetection.Thedesignofthehardwareissimple.Sotheprojecthassomepracticalvalue.KeyWords:harmonic；fastfouriertransform；TMS320LF24O7A；digitalsignalprocessingIIIII

8、I目录摘要