微网综合控制技术研究

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1、Abstract硕：l：论文jThemicrogridisavarietyofmicro—sourcecombinationoflow·voltagepowergridtoprovideelectricpowerforthelocal10ad．Themajorityofmicro—source、isconnectedwiththemaingridinverterinterface，whilereducingtheinertiaofthesystem,butthecontrolflexibilityofmicr

2、opower白increase．Operationofislandedandgrid-connectedmicrogridistWOtypicalmodeofoperation,improvethereliabilityofpowersupply，butalsoincreasedthedifficultyofcontrolsystemintermSof矗equency,voltageandenergybalance．Thediversityofnetworkoperationmodeandthelackofi

3、nertiaincreasesthesystemcontro，difficultyinmaintainingstablefrequencyandenergybalance．CurrentresearchonthemicrosourcefoIvarioustypesofcontrolmethodsintwodifferentmodesofope晒锄isrelatively：mature,÷6Hfin：thetwokindsofrnodeswitching。processless．Thispapermainlys

4、tudiesmemethodforcontro，ofmicrogridintwomodes?aswellasfromtheislandtothesmoothhandoverofmicrogridgrid-connectedmodecontrolstrategy．Themainworkisasfollows：胁￡ly,summarizetwoexistingmicrogridcontrolofmaincontrolstrategiesandthecontrolstrategYofthepros黜dconsofc

5、omparison,putforwardtherealizationoftheislandtOthegrid—connectedmodesmoothhandoffsignificance．。Secondly,tOanalyzethedroopcontrolcharacteristics，throughtheestablishmentofdroopcontrolsmallsignalmodel,acarefulanalysisoftheinfluenceofcut—offfrequencyvoltagefreq

6、uency,voltagedroopparametjersandlowpassfilterofthreeparametersforthestabilityofthesystem．Then，setupthemathematicalmodelofthree-phasevoltageinverterinthetwo—phasesynchronousrotatingcoordinatesystem；thetWOoperationmodesofmicrogridindependentlyandgrid-connecte

7、doperation，introducesthedouble-loopdroopcontrolfeedbackcontrolprincipleandcontrolbasedOnPQ，andthecontrollerparametersareoptimizedthroughconfirmation；simulationmodel，verifytheeffectivenessofthecontroller．Finally,thispaperstudiesthemicrogridsmoothcutting—inco

8、ntrolstrategy．Analysisofasynchronousdeviceinpowersystemareimportantroleinoperation，asuitableP一09，Q—Edroopcontrolofmicropowerinverterthesynchronizationcontrollerdesign．Simulation。resultSshowthatthepretr