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LCL型三相光伏并网逆变器控制策略研究(英文) Title:ResearchonControlStrategiesforLCL-TypeThree-PhaseGrid-ConnectedPhotovoltaicInverters Abstract: Withtherapiddevelopmentofphotovoltaic(PV)systems,grid-connectedinvertershavebecomecrucialinconvertingtheDCpowergeneratedbyPVpanelsintoACpowerandsupplyingittothegrid.Amongvarioustypesofinverters,LCL-typethree-phaseinvertershavegainedsignificantattentionduetotheiradvantagesintermsofefficiency,powerquality,andgridstability.ThisresearchpaperfocusesoninvestigatingdifferentcontrolstrategiesforLCL-typethree-phasegrid-connectedPVinverters. 1.Introduction: 1.1Background: -Overviewofphotovoltaicsystemsandtheirimportanceinrenewableenergyintegration. -Introductiontogrid-connectedPVinvertersandtheirroleinpowerconversion. -Importanceofcontrolstrategiesinenhancingtheperformanceandstabilityofgrid-connectedPVsystems. 1.2Objective: -TostudyandanalyzecontrolstrategiesforLCL-typethree-phasegrid-connectedPVinverters. -Toevaluatetheperformanceofdifferentcontrolstrategiesintermsofefficiency,powerquality,andgridstability. -ToidentifythemostsuitablecontrolstrategyforLCL-typethree-phasegrid-connectedPVinverters. 2.LCL-typeThree-PhaseGrid-ConnectedInverter: 2.1Overview: -IntroductiontoLCL-typethree-phaseinvertersandtheirworkingprinciple. -ExplanationofthecomponentsandtheirfunctionsinLCL-typeinverters. -AdvantagesanddisadvantagesofLCL-typeinvertersoverothertypes. 2.2ControlObjectives: -Powerconversionefficiencyoptimization. -Harmonicsuppressionandpowerqualityenhancement. -Gridstabilityenhancement. 3.ControlStrategiesforLCL-TypeThree-PhaseGrid-ConnectedInverters: 3.1Proportional-Resonant(PR)Control: -ExplanationofPRcontrolstrategy. -ImplementationofPRcontrolinLCL-typeinverters. -AdvantagesandlimitationsofPRcontrolinLCL-typeinverters. 3.2PredictiveCurrentControl(PCC): -IntroductiontoPCCstrategy. -AnalysisofPCCimplementationinLCL-typeinverters. -PerformanceevaluationofPCCintermsofefficiencyandpowerquality. 3.3ModelPredictiveControl(MPC): -OverviewofMPCstrategy. -Application