基于虛擬儀器技術(shù)的電力諧波檢測(cè)系統(tǒng)設(shè)計(jì)

1、東南大學(xué)碩士學(xué)位論文基于虛擬儀器技術(shù)的電力諧波檢測(cè)系統(tǒng)設(shè)計(jì)姓名：王玨申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：電力電子與電力傳動(dòng)指導(dǎo)教師：鄭建勇20080531ABSTRACTSincethe1970s，theproblemsofpowersystemharmonicshaveattractedconsiderableinterestaIIvertheworldBecausetheequipmentsofpowerelectronicsplaymorea

2、ndmoreimportantroleinrailway，chemicalindustry，metallurgicalindustry，andcoalindustry，theproblemsofpowersystemharmonicsaremoreandmoreserious，whichmakescontrollingharmonics，inspectingandharnessingharmonicstakemoreandmoreimp

3、ortantpositionTherearemanytraditionalharmonic—detectingmeasurementsinpowersystem，buttheyhavetheirOWnadvantagesanddisadvantagesInthisthesis，wecomparedafewharmonicsdetectingmethodsinexistenceAftercomparingtheiradvantagesan

4、dshortages，wefoundthatthemethodbasedontheinstantaneousreactivepowertheoryhasthevirtueofgoodrealtimeandlittledelaytimeAndthismethodCannotonlydetecttheharmonicsbutalsocompensatereactivepowerItiSofvitalsignificancetotheprac

5、ticalengineeringapplicationAfterabriefintroductionofvirtualinstrumentandgraphicslanguage，wedesignedasoftwaresystemoftheharmonicsdetectingbyLABVIEWandMATLAB70Intheharmoniccurrenttestingsystem，signalgeneratorcanrecordallmi

6、ddlevariables，suchasreactiveandactivecurrent，analysissignalpowerspectrumBecausemeasureprecisionisaffectedbyfrequencychange，wedesignedsoftwaretotracethefrequencytracing，Whenharmonicsofcurrentisdetected，thesoftwarecanalsos

7、olvetheinphaseproblemaboutthereferenceinputvoltageandthefundamentalwavevoltageMeanwhilethissoftwaresystemhasthefunctions：reaItimemeasuring，displaying，analyzing，datasavingandSOonTotestthecapabilityofthesystem，experimentsa

8、reconductedbykindsofinputsinglesgeneratedbysoftwareTheinputsinglesaremainlycomposedoffundamentalwaveaddthethirdandthefifthharmonic，andsquarewavesThissystemcaneasilystudytherelationshipamongparametersintheinstantaneousrea