低压微电网运行特性及控制技术的研究

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1、ResearchontheOperatingCharacteristicsandControllingTechnologyoftheLowVoltageMicrogridABSTRACTAtpresent．issuesaboutenergyandenvironmenthavebecomeakeyfactorrestrictingsocialdevelopment．Distributedgenerationcanachievethewin’Wlnsituationofenergysavingandbeingenv

2、ironmentallyfriendly；therefore，itgraduallybecomesanimportantresearchorientationofthepowerindustry·However．distributedgenerationhasmanydeficiencies．Theconceptofmicrogridwasbroughtintobeingtosolvethecontradictionbetweenthepowersystemandtheconnectionofdistribut

3、edgeneration，andtogivefullplaytothepotentialofdistributedgeneration，andithasgraduallybecomeahottopicofresearchathomeandabroad．Thispapermainlyfocusesontheresearchintotheoperatingcharacteristicsandcontrollingtechnologyoflow—voltagemicrogrid，andthemaincontentsa

4、reasfollows：First．theoDerationmodeandcontrollingrequirementsofatypicalmicrogridaredeeplyanalyzed，andabriefintroductionofthedistributedgenerator，energystoragedevices，switches，powerelectronicdevices，communicationstechnologyandcharacteristicsofloadisgiven．Secon

5、d．onthebasisthatmostofthedistributedgeneratorsinmicrogridareottheinverter．type，thispapermainlyfocusesonthreecommonlyusedcontrollingmethodsofdistributedgenerators：constantpowercontrol，constantvoltage／constantfrequencycontrolanddroopingcontr01．Theconclusionist

6、hatdifferentdistributedgeneratorsanddifferentoperatingmodeofthemicrogridsystemrequiredifferentcontrollingmethods．Onthisbasis，threecommonlyusedmicrogridsystemcontrollingmodesareresearched．i．e．masterslavecontrol，peer—to’peercontrolandhierarchicalcontrol，withde

7、tailedanalysisofimplementationmethodsofthethreecontrollingmethodsandtheircharacteristics．Builtonthebasisoftheoreticalanalysis，andbasedonMatlab／Simulinksimulationplatform，thesimulationmodelofV／fcontrolandPQcontrolsystemofmlcrosourcesarebullt·Besides．asimplest

8、ructureofmicrogridsimulationmodelcontainingtwomicrosourcesisestablished．Simulationaboutpartofthecharacteristicsotgrid—connectedmodeandislandedmodeofmicrogridismadeusingmasterslavecontrol，andthes