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1、華東交通大學(xué)碩士學(xué)位論文廣域測(cè)量系統(tǒng)中的PMU布點(diǎn)優(yōu)化及研究姓名：馬勇申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：電力系統(tǒng)及其自動(dòng)化指導(dǎo)教師：陳赤培20080420AbstractPLACEMENTOFPHASORMEASUREMENTUNITS(PMU)ISOPTIMIZEDANDRESEARCHINWIDEAREAMEASUREMENTSYSTEMABSTRACTWideareameasurementsystem(WAMS)arehavingbeenanewlydevelopingresearchandadiscus
2、singfieldintheworld,isanimportantphasewhichbringthepowerautomationfromsteadymonitoringtotransientstateandtodynamicsteadycontrollingdevelopment.Theestablishmentofwideareameasurementsystem(WAMS)whichbasesonsynchronizedphasormeasurementunitandmoderncommuni
3、cationtechnologyprovidesanadvancedinformationtechnologyplatform.Itmakesthepowertoreal-timesupervisoryandcontrolwithlargearea.Theaimofthispaperistostudythemethodofsynchronizedphasormeasurementandplacementofphasormeasurementunit,becausephasormeasurementun
4、it(PMU)isanimportantcomponentinthewideareameasurementsystem(WAMS).InthisthesisthesignificanceandprogressofsynchronizedphasormeasurementbasedonGPSareintroducedatfirst,anditsapplicationinthepowersystemispresentedatthesametime.Thenthezero-crossingdetection
5、methodandtheDFTalgorithmadoptedinthephasormeasurementarediscussedindetail.Tominimizetheerrors,somenovelmethodsareincludedinthezero-crossingdetection.Toimprovemeasurementaccuracy,alsoadouble-ratesamplingmethodisproposed.OnerecursiveDFTalgorithmrequiringl
6、esscomputationalworkisinvestigated.Inordertoimprovetheaccuracyofthefrequencymeasurement,themeasurementerrors,whicharecausedbydecayingtheDCcomponent,thefrequencyvariationandetc,arediscussedindetail.Inthefaceoftheproblemssuchasfrequencyshift,harmonic,osci
7、llatingmovementandsoon,amethodbasedonquasi-synchronoussamplingandDFTalgorithmisproposedinthispapertotrackfrequencyandmeasurephase,byanalyzingvariousapproachesforthephasormeasurementwhicharebasedonsynchronizedsamplingorquasi-synchronoussampling.Intheproc
8、essofcalculatingfrequency,theDFTwhichcaneliminatedecayingDCcomponentandlinearinterpolationmethodareusedtocalculatetheestimatedphasoratanytime,andtheiterationmethodisusedtofindoutthetwoestimatedphasorswhoseintervalisoneperiod.Then
