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’Wlnsituationofenergysavingandbeingenvi

2、ronmentallyfriendly；therefore，itgraduallybecomesanimportantresearchorientationofthepowerindustry·However．distributedgenerationhasmanydeficiencies．Theconceptofmicrogridwasbroughtintobeingtosolvethecontradictionbetweenthepowersystemandtheconnectionofdistributed

3、generation，andtogivefullplaytothepotentialofdistributedgeneration，andithasgraduallybecomeahottopicofresearchathomeandabroad．Thispapermainlyfocusesontheresearchintotheoperatingcharacteristicsandcontrollingtechnologyoflow—voltagemicrogrid，andthemaincontentsarea

4、sfollows：First．theoDerationmodeandcontrollingrequirementsofatypicalmicrogridaredeeplyanalyzed，andabriefintroductionofthedistributedgenerator，energystoragedevices，switches，powerelectronicdevices，communicationstechnologyandcharacteristicsofloadisgiven．Second．on

5、thebasisthatmostofthedistributedgeneratorsinmicrogridareottheinverter．type，thispapermainlyfocusesonthreecommonlyusedcontrollingmethodsofdistributedgenerators：constantpowercontrol，constantvoltage／constantfrequencycontrolanddroopingcontr01．Theconclusionisthatdi

6、fferentdistributedgeneratorsanddifferentoperatingmodeofthemicrogridsystemrequiredifferentcontrollingmethods．Onthisbasis，threecommonlyusedmicrogridsystemcontrollingmodesareresearched．i．e．masterslavecontrol，peer—to’peercontrolandhierarchicalcontrol，withdetailed

7、analysisofimplementationmethodsofthethreecontrollingmethodsandtheircharacteristics．Builtonthebasisoftheoreticalanalysis，andbasedonMatlab／Simulinksimulationplatform，thesimulationmodelofV／fcontrolandPQcontrolsystemofmlcrosourcesarebullt·Besides．asimplestructure

8、ofmicrogridsimulationmodelcontainingtwomicrosourcesisestablished．Simulationaboutpartofthecharacteristicsotgrid—connectedmodeandislandedmodeofmicrogridismadeusingmasterslavecontrol，andthes