含分布式电源的直流微电网并网技术研究

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1、万方数据山东大学硕士学位论文ABSTRACTEnergyisthematerialbasistosupporttheprogressofhumancivilization，anditisindispensabletothedevelopmentofmodemsociety．ThedevelopmentofChina’Senergyisfacedwithmanychallenges．Energyresourceendowmentisnothigh，percapitaconsumptionofcoal，oilandnaturalga

2、sislow．Inrecentyears，thegrowthoftotalenergyconsumptionisrapidly,andthepressureofenergysupplyisincreasing．Large—scaleexploitationandutilizationoffossilfuelsisresultinginsomedegreeofimpactOiltheecologicalenvironment．Manisnowfacingahugehistoricchange，itsgoalisthattheuse

3、offossilenergyistransformedintotheuseofrenewableenergy．Newenergyistheinevitablechoicetosolvetheproblemofthehumansustainabledevelopment．Thedevelopmentofnewenergyhasbecometheconsensusofallcountriesintheworld．Thewindandsolarenergyasarenewablecleanenergyhaveagoodcompleme

4、ntarytoeachotherintimeandspace，wind-lightcomplementarysystemhasbecomeaeffectivewaytoreasonablydevelopmentandutilizationofnewenergy．Withthedevelopmentofpowerelectronictechnologyandcontroltechnology,DCmicrogridhasgottheattentionfromallwalksoflife．ComparedwithACmicrogri

5、d，DCmicrogriddoesnotneedtoconsiderthephasevoltageandfrequencytheoperationofdistributionnetworkismoreflexibleandhigherreliable．BasedonthestableoperationoftheDCmicrogrid，allaspectsoftheWind-Solar-Storagemicrogridcontrolstrategyarestudiedinthepaper．Thestudyinvolvesthesy

6、stemtopology,maximumpowerpointtracking(MPPT)methodsofwindandPVpower,thecontrolstrategyofinverter．AndthispaperhascarriedonthesimulationtheplatforminthePSCADenvironment，thesimulationresultsareanalyzed，whichlaidafoundationforthefurtherstudyonthefollow—upofthemicrogrid．T

7、hemainstudycontentsarediscussedasfollows：Firstly,weanalyzethestructureofDCmicrogridandresearchthecharacteristicsandtheaccessmodeofthedistributedpowersupply．Therelevantcharacteristicsof万方数据山东大学硕士学位论文thewindturbine，photovoltaicarrayandbatteryareanalyzedwhichhavelaidago

8、odtheoreticalfoundationforthemodelestablishmentandthecontrolstrategySecondly,wemakeadetailedstudyofmaximumpowerpointtracking(MPPT)m