智能电力设备设计.docx

智能电力设备设计.docx

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智能电力设备设计

光伏逆变器、风电变流器

功率MOSFET、IGBT、IPM

电力电子产品/设备

APF、SVG

大容量变换技术

大功率电磁兼容设计

Photovoltaicinverter,windpowerconverters

PowerMOSFET,IGBT,IPM

Powerelectronicproducts/equipment

APF,SVG

Largecapacitytransform

EMCDesignPower

5 kWDC/DCconverterforhydrogengenerationfromphotovoltaicsources

InternationalJournalofHydrogenEnergy

ThispapercoversthedesignofaDC–DCpowerconverteraimedforhydrogenproductionfromphotovoltaicsources.Powerconditioningforsuchapplicationisusuallydrivenbydifferentconstraints:

highstep-downconversionratioisrequirediftheinputvoltageofsuchequipmenthastobecompatiblewithphotovoltaicsourcesthatareconnectedtogrid-connectedinverters;galvanicisolation;highefficiencyandlowmass.Takingintoaccountthosefactors,thisworkproposesapush–pullDC/DCconverterforpowerlevelsupto5 kW.Theoperationandfeaturesoftheconverterarepresentedandanalyzed.Designguidelinesaresuggestedandexperimentalvalidationisalsogiven.

ArticleOutline

Nomenclature

1.Introduction

2.DC/DCconverter:

operationprincipleandfeatures

2.1.PVandelectrolyserelectricalmodels

2.2.DC/DCconverterdesign

3.Applicationofaspecificdevelopment

3.1.Initialspecifications:

photovoltaicarrayandelectrolyser

3.2.Deviceselection

3.3.Inputandoutputfilters:

calculationsandrealisation

3.4.Magneticdesign:

transformerandinductors

3.5.DrivingandPWMcontrolcircuits

4.DC/DCconvertersimulationsandexperimentalresults

5.Conclusions

References

Grid-connectedphotovoltaicpowersystems:

Technicalandpotentialproblems—Areview 传统区域性光伏发电电力系统的革新

RenewableandSustainableEnergyReviews可再生与可持续利用能源评论

Traditionalelectricpowersystemsaredesignedinlargeparttoutilizelargebaseloadpowerplants,withlimitedabilitytorapidlyrampoutputorreduceoutputbelowacertainlevel.Theincreaseindemandvariabilitycreatedbyintermittentsourcessuchasphotovoltaic（PV）presentsnewchallengestoincreasesystemflexibility.Thispaperaimstoinvestigateandemphasizetheimportanceofthegrid-connectedPVsystemregardingtheintermittentnatureofrenewablegeneration,andthecharacterizationofPVgenerationwithregardtogridcodecompliance.TheinvestigationwasconductedtocriticallyreviewtheliteratureonexpectedpotentialproblemsassociatedwithhighpenetrationlevelsandislandingpreventionmethodsofgridtiedPV.Accordingtothesurvey,PVgridconnectioninvertershavefairlygoodperformance.Theyhavehighconversionefficiencyandpowerfactorexceeding90%forwideoperatingrange,whilemaintainingcurrentharmonicsTHDlessthan5%.Numerouslarge-scaleprojectsarecurrentlybeingcommissioned,withmoreplannedforthenearfuture.PricesofbothPVandbalanceofsystemcomponents（BOS）aredecreasingwhichwillleadtofurtherincreaseinuse.ThetechnicalrequirementsfromtheutilitypowersystemsideneedtobesatisfiedtoensurethesafetyofthePVinstallerandthereliabilityoftheutilitygrid.Identifyingthetechnicalrequirementsforgridinterconnectionandsolvingtheinterconnectproblemssuchasislandingdetection,harmonicdistortionrequirementsandelectromagneticinterferencearethereforeveryimportantissuesforwidespreadapplicationofPVsystems.Thecontrolcircuitalsoprovidessufficientcontrolandprotectionfunctionslikemaximumpowertracking,invertercurrentcontrolandpowerfactorcontrol.Reliability,lifespanandmaintenanceneedsshouldbecertifiedthroughthelong-termoperationofPVsystem.Furtherreductionofcost,sizeandweightisrequiredformoreutilizationofPVsystems.UsingPVinverterswithavariablepowerfactorathighpenetrationlevelsmayincreasethenumberofbalancedconditionsandsubsequentlyincreasetheprobabilityofislanding.ItisstronglyrecommendedthatPVinvertersshouldbeoperatedatunitypowerfactor.

ArticleOutline

Nomenclature

1.Introduction

2.Glossaryoftermsandacronyms

3.GlobalPVmoduleanditselectricalperformance

4.Grid-connectedPVsystems

4.1.Powervalue

4.2.RatiobetweenloadandPVpower

5.Potentialproblemsassociatedwithhighpenetrationlevelsofgrid-tiedPV

6.Grid-connectedinverters—controltypesandharmonicperformance

6.1.Harmonics

6.2.Inverters’operationalanalysis

7.Islandingdetectionmethods

8.Performanceandreliabilityofinverterhardware

9.Theoverallconclusionandrecommendation

Acknowledgements

References

光伏系统设计选型的优化联网系统中各模块的技术革新与效能整合提高

Optimalsizingofagrid-connectedPVsystemforvariousPVmoduletechnologiesandinclinations,inverterefficiencycharacteristicsandlocations  

RenewableEnergy

Anoptimalsizingmethodologybasedonanenergyapproachisdescribedandappliedtogrid-connectedphotovoltaicsystemstakingintoaccountthephotovoltaicmoduletechnologyandinclination,theinvertertypeandthelocation.Amodeldescribingtheefficiencyform-Si,p-Si,a-SiandCISisused.ThemethodhasbeenappliedonvariousmeteorologicalstationsinBulgariaandCorsica（France）.Themainparameteraffectingthesizingistheinverterefficiencycurve.TheinfluenceofthePVmoduletechnologyseemslessimportantexceptforamorphousphotovoltaicmodulesforwhichspecialremarkshavebeenmade.TheinclinationonthePVsysteminfluencestheperformancesparticularlywhentheinverterisundersizedcomparedtothePVpeakpower.

ArticleOutline

1.Introduction

2.PVmoduleefficiency

2.1.SomemodelsofPVefficiencyandmaximumpower

2.2.Experimentalverification

3.Grid-connectedinverters

4.SolarradiationestimationontiltedPVmodules

4.1.Thediffusecomponent

4.2.Thediffusecomponentontiltedsurface

4.3.Thetiltedbeamradiation

4.4.Thegroundreflectedradiation

5.Sizingoptimizationmethodology

6.Optimizationresults

6.1.InfluenceoftheinvertertypeandPVmoduleinclination

6.2.InfluenceofthePVtechnology

6.3.Siteinfluence

7.Monthlyperformances

7.1.MonthlyvariationofthePVefficiency

7.2.MonthlyvariationofPVsystemefficiency

8.Conclusions

Efficientdesignandsimulationofanexpandablehybrid（wind–photovoltaic）powersystemwithMPPTandinverterinputvoltageregulationfeaturesincompliancewithelectricgridrequirements 低压智能电力电子变换技术

ElectricPowerSystemsResearch

Inthispaperanefficientdesignalongwithmodelingandsimulationofatransformer-lesssmall-scalecentralizedDC—busGridConnectedHybrid（Wind–PV）powersystemforsupplyingelectricpowertoasinglephaseofathreephaselowvoltage（LV）strongdistributiongridareproposedandpresented.Themaincomponentsofthehybridsystemare:

aPVgenerator（PVG）;andanarrayofhorizontal-axis,fixed-pitch,small-size,variable-speedwindturbines（WTs）withdirect-drivenpermanentmagnetsynchronousgenerator（PMSG）havinganembeddeduncontrolledbridgerectifier.AnoverviewofthebasictheoryofsuchsystemsalongwiththeirmodelingandsimulationviaSimulink/MATLABsoftwarepackagearepresented.Anintelligentcontrolmethodisappliedtotheproposedconfigurationtosimultaneouslyachievethreedesiredgoals:

toextractmaximumpowerfromeachhybridpowersystemcomponent（PVGandWTs）;toguaranteeDCvoltageregulation/stabilizationattheinputoftheinverter;totransferthetotalproducedelectricpowertotheelectricgrid,whilefulfillingallnecessaryinterconnectionrequirements.Finally,apracticalcasestudyisconductedforthepurposeoffullyevaluatingapossibleinstallationinacitysiteofXanthi/Greece,andthepracticalresultsofthesimulationsarepresented.

ArticleOutline

1.Introduction

2.Configurationandmodelingofasmall-scalecentralizedDC—busGCHWPPSviaSimulink/MATLAB

2.1.Solarandwindpotentialanalysisofaselected（candidate）installationsite

2.2.PhotovoltaicSubsystem

2.2.1.Photovoltaicgenerator（PVG）model

2.2.2.Buck-BoostDC–DCConverter（BBC1andBBC2）models

2.2.3.Controlunit（DSP1）ofthePVS

2.3.WindEnergyConversionSubsystem

2.3.1.Windturbinemodel

2.3.2.Permanentmagnetsynchronousgenerator（PMSG）model

2.3.3.Embeddeduncontrolleddiodebridgerectifiermodel

2.3.4.Buck-BoostDC–DCConverter（BBC3andBBC4）models

2.3.5.Controlunit（DSP2）oftheWECS

2.4.Powerdecouplingcapacitor（CPD）

2.5.Necessaryrequirements（rules）forconnectingaHWPPStotheGreekLVdistributiongrid

2.5.1.Electricgridmodel

2.5.2.Invertermodel

2.5.3.Controlunit（DSP3）oftheinverter

3.Casestudy

3.1.SolarandwindpotentialanalysisoftheselectedsiteinXanthi,Greece

3.2.Simulationresults

4.Conclusions

AppendixA.Listofsymbols

AppendixB.Fuzzyrules

References

Vitae

Designofanon-invertingsynchronousbuck-boostDC/DCpowerconverterwithmoderatepowerlevel 

RoboticsandComputer-IntegratedManufacturing

Thispaperpresentsthedesignofanon-invertingsynchronousbuck-boostDC/DCpowerconverterwithmoderatepowerlevelforasolarpowermanagementsystem.Thebuck-boostrequirementarisesfromtherapidchangesintheatmosphericconditionorthesunlightincidentangle.Thesystemmainlyconsistsofthenon-invertingsynchronousbuck-boostDC/DCpowerconverter,MOSFETdrivers,anti-crossconductionlogiccircuitry,feedbackcompensator,andPWMregulator.Thesystemiscapableofconvertingthesupplyvoltagesourcetohigherandlowervoltagestotheloadterminalwithvoltagepolarityunchanged.ThevoltageattheloadterminaliscontrolledbycontinuouslyadjustingthedutycycleofthePWMregulator.Applicationofthebuck-boostconverterinbatterymanagementsystemdesignisalsoaddressed.

ArticleOutline

1.Introduction

2.Synchronousbuck-boostconverter

3.Systemdesign

4.Dynamiccharacteristic

5.