家庭并离网一体光储系统的能量管理系统分析-analysis of energy management system of integrated home and off-grid optical storage system.docxVIP
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家庭并离网一体光储系统的能量管理系统分析-analysis of energy management system of integrated home and off-grid optical storage system
关实验。实验结果验证了本文所提能量管理系统的正确性和有效性,为家庭并离网一体光储系统的产品实际应用提供依据。关键词:能量管理,变流器,光伏发电,电池储能,家用ENERGYMANAGEMENTSYSTEMRESEARCHFORDOMESTICGRID-CONNECTED/STAND-ALONEINTEGRATEDPHOTOVOLTAICPOWERSYSTEMABSTRACTRenewableenergydistributedgenerationplaysakeyroletomaintaindynamicandsustainabledevelopmentforeverygovernment.Solarphotovoltaicpowerhasbecomeanattractiveenergysupplyoptionasaresultoffossilfueldepletionandenvironmentpollution.Thispaperputsforwardanefficientenergymanagementstrategyfordomesticgrid-connected/stand-aloneintegratedphotovoltaicpowersystemtoensurethestabilityofthesystemoperation.Thedomesticgrid-connected/stand-aloneintegratedphotovoltaicpowersystemiscomposedbysolarcells、lithiumbattery、publicgrid、localloadsandpowerconverters.ThepowerconvertersconsistofboostconverterinPVside,buck-boostconverterinbatterysideandfull-bridgeconverterinloadside.AlltheseconvertersconnecttotheDCbuscomposingaDCmicro-grid.Theyworkindividuallyatthecommandofsystem’senergymanagementmoduletocontrolthevoltageofDCbustoaconstantvalue.Thedomesticphotovoltaicpowersystemcanworkonfourdifferentoperationmodes:1)stand-alonewithPVpowergeneration;2)grid-connectedinversion;3)stand-alonewithbatterypowersupplying;4)grid-connectedrectification.Thepaperanalyseseachconverter’scontrolstrategywhenthesystemworksondifferentoperationmode.Thepaperdefinesthepriorityofpowersupplyamongthethreemicrosourcesinthesystem,whichranksPVasfirst,thenbatteryandgridlast.Basedontheprincipleofpowersupplypriority,thepaperproposesanenergymanagementstrategyforthesystem.Thestrategycanensurethestabilityofthesystembychangingtheworkpatternsofthreeinvertersaccordingtothevariationofphotovoltaicoutputpower,battery’sSOCandloadconditions.ThesimulationresultswhichmodelinMatlab/Simulationsuggestthattheenergymanagementstrategycanswitchtheoperationmodeofthesystemreasonably,soastorealizethestableoperationofthesystem.Thenthepaperdesignsthehardwarecircuitandsoftwareprocessofthesystem’senergymanagementmoduleblock.Experimentalresultsona5kWdomesticgrid-connected/stan
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