highest average diurnal wind speeds are observed at 3 pm The diurnal maximum average wind speeds w.docx
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highestaveragediurnalwindspeedsareobservedat3pmThediurnalmaximumaveragewindspeedsw
TheHP-WDHSpresentedinthisarticleconsistsofaDieselEngine(DE),aSynchronousMachine(SM),aWindTurbineGenerator,theconsumerload,aNi-CdBatterybasedEnergyStorageSystem(BESS)andaDumpLoad.TheDEcanbeengaged(DOandWDmodes)ordisengaged(WOmode)fromtheSMbymeansofaclutch.AllthemodelsofthepreviouslymentionedcomponentsarepresentedandtheperformanceoftheWDHShasbeentestedthroughdynamicsimulation.Simulationresultswithgraphsforthefrequencyandvoltageoftheisolatedpowersystem,activepowersgenerated/absorbedbythedifferentelementsandthebatteryvoltage/current/stateofchargearepresentedforaloadchangeinWOmodeandforthetransitionfromWOtoWDmodeinordertosubstituteasupplyingBESSfortheDEastheactivepowersource.
ArticleOutline
1.Introduction
2.Theisolatedpowersystem(WDHSarchitecture)
3.Thecontrolsystem
4.Simulationschematics
5.Simulationresults
5.1.FrequencyregulationinWOmode
5.2.WOtoWDmodetransition
6.Conclusions
AppendixA
References
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63
GIS-basedapproachfortheevaluationofwindenergypotential:
AcasestudyfortheKujawsko–PomorskieVoivodeship ReviewArticle
RenewableandSustainableEnergyReviews,Volume15,Issue3,April2011,Pages1696-1707
BeataSliz-Szkliniarz,JoachimVogt
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AbstractAbstract|Figures/TablesFigures/Tables|ReferencesReferences
Abstract
Theuseofrenewableenergysourcesforenergyproductionisincreasinglygainingimportanceinthetransitionofenergysystemsbasedonfossilfuels.InPoland,windenergyisexpectedtoplayamayorroleinfulfillingtherecenttargetssetoutbythenationalpolicy.Astheutilisationofwindenergyisperceivedtobeassociatedwithvariousnegativeimpacts,thiskindofenergysourceshouldbesystematicallyaddressedbyrelatedspatialpolicyinstrumentstoensureitsharmonisationwithinfrastructural,ecologicalandsocio-economicsystems.
Theobjectiveofthisstudyistodevelopanapproachtosupportthedecisionmakingprocessconnectedwiththesiteselectionforwindenergyprojectsusingageographicalinformationsystem.
Availablelocationsforwindfarmsiteswereinvestigatedaccordingtodefinedcriteriareflectingthespatialandecologicalpolicyandregulations.Thetechnicalandeconomicpotentialwasestimatedtoquantifytheconditionsofthecasestudyregionregardingtheutilisationofthewindsource.
ThemethodologywasappliedtotheKujawsko–PomorskieVoivodeship,sincenosuchstudyisavailablefortheregion.Theresultsfromthestudyshouldhelptobuildadevelopmentalvisionforsustainableenergysystemsbasedonlocallyavailableresources.
ArticleOutline
1.Introduction
2.StatusquoofwindenergyintheregionKujawsko–Pomorskie
3.Methodologyandscopeofthestudy
3.1.Assessmentofsuitableareasforwindturbines
3.2.Technicalpotential
3.2.1.Windspeeddata
3.2.2.Windspeedextrapolation
3.2.3.Windspeedinterpolation
3.2.4.Windenergyproduction
3.3.Theeconomicpotentialofwindenergy
4.Conclusion
5.Outlook
Acknowledgements
AppendixA.ConstrainsforwindturbinesitingintheregionKujawsko–Pomorskie
AppendixB.RoughnesslengthbasedontheCLCdata
References
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64
Optimalwind-hydrosolutionfortheMarmararegionofTurkeytomeetelectricitydemand OriginalResearchArticle
Energy,Volume36,Issue2,February2011,Pages864-872
BahtiyarDursun,BoraAlboyaci,CihanGokcol
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AbstractAbstract|Figures/TablesFigures/Tables|ReferencesReferences
Abstract
Windpowertechnologyisnowareliableelectricityproductionsystem.ItpresentsaneconomicallyattractivesolutionforthecontinuouslyincreasingenergydemandoftheMarmararegionlocatedinTurkey.However,thestochasticbehaviorofwindspeedintheMarmararegioncanleadtosignificantdisharmonybetweenwindenergyproductionandelectricitydemand.Therefore,toovercomewind’svariablenature,amorereliablesolutionwouldbetointegratehydropowerwithwindenergy.Inthisstudy,amethodologytoestimateanoptimalwind-hydrosolutionisdevelopedanditissubsequentlyappliedtosixtypicaldifferentsitecasesintheMarmararegioninordertodefinethemostbeneficialconfigurationofthewind-hydrosystem.Allnumericalcalculationsarebasedonthelong-termwind speedmeasurements,electricalloaddemandandoperationalcharacteristicsofthesystemcomponents.
ArticleOutline
1.Introduction
2.DescriptionofthesitesintheMarmararegion
3.Wind-hydropumpstoragesystems
4.DeterminationofthewindcharacteristicsofthesixsitesintheMarmararegion
5.Proposedsolution
6.Wind-turbineselection
7.Hydro-turbineselection
8.Hydro-pumpselection
9.Analysisofthesimulationresults
10.Conclusion
Abbreviations
References
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Researchhighlights
►Thisstudyisthefirstapplicationofawind-hydropumpedstoragesysteminTurkey.►ThemethodologydevelopedinthisstudyisappliedtothesixsitesintheMarmararegionofTurkey.Awind–hydropumpedstoragesystemisproposedtomeettheelectricenergydemandoftheMarmararegion.
65
SimulationofaslopedsolarchimneypowerplantinLanzhou OriginalResearchArticle
EnergyConversionandManagement,Volume52,Issue6,June2011,Pages2360-2366
FeiCao,LiangZhao,LiejinGuo
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AbstractAbstract|Figures/TablesFigures/Tables|ReferencesReferences
Abstract
Solarchimneypowersystemisonelarge-scaleutilizationstyleofsolarenergy,whichhasdrawnhighattentionsworldwide.Thoughscholarsallovertheworldhavemademanyresearchesonthesolarchimneypowersystem,reportsofslopedsolarchimneypowersystemarestillfew.Aslopedsolarchimneypowerplant,whichisexpectedtoprovideelectricpowerforremotevillagesinNorthwestChina,hasbeendesignedforLanzhouCityinthispaper.Thedesignedplant,inwhichtheheightandradiusofthechimneyare252.2 mand14 mrespectively,theradiusandangleofthesolarcollectorare607.2 mand31°respectively,isdesignedtoproduce5 MWelectricpoweronamonthlyaverageallyear.Theperformances,suchastheairflowtemperatureincrease,pressure,theairflowspeed,systemefficiencyandsolarcollectorefficiency,ofthebuiltslopedsolarchimneypowerplantaresimulatedandpresented.Simulationresultsshowthatparametersoftheslopedsolarchimneypowerplantaresymmetricalandstable;thepowerplanthasbetterperformancesinspringandautumndays;theoverallefficiencyofthepowerplantislow.Consideringtheabundantsolarradiation,environmentalfriendliness,easymanagementandlowpopulationdensity,theslopedsolarchimneypowersystemisofhighvaluetoNorthwestChina.
ArticleOutline
Nomenclature
1.Introduction
2.Systemdescription
3.Mathematicalmodel
3.1.Solarcollector
3.2.Chimney
3.3.Powergenerationandthermalefficiency
4.ConfigurationsizesoftheSSCPP
5.Resultsanddiscussion
5.1.SSCPPperformancesindifferentmonths
5.2.EfficiencyoftheSSCPP
5.3.Discussions
6.Conclusions
Acknowledgements
References
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Researchhighlights
►AslopedsolarchimneypowerplantinLanzhou,Chinaisinvestigated.►Theconfigurationsizesaredesignedseparately.►Thesystemhashighperiodicityandstabilitybutlowefficiency.►TheslopedsolarchimneypowersystemisofhighvalueforNorthwestChina.
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Dynamicsecurityissuesinautonomouspowersystemswithincreasingwindpowerpenetration OriginalResearchArticle
ElectricPowerSystemsResearch,Volume81,Issue4,April2011,Pages880-887
I.D.Margaris,A.D.Hansen,P.Sørensen,N.D.Hatziargyriou
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AbstractAbstract|Figures/TablesFigures/Tables|ReferencesReferences
Abstract
Technicalrequirementssetbythenetworkoperatorsnowadaysincludevariousaspects,suchasfaultride-throughcapabilityofwindturbinesduringfaults,voltage-reactivepowercontrolandoverallcontrolofthewindfarmsasconventionalpowerplants.Detailedmodelsforthepowersystemaswellasforthewindfarmsarethereforeessentialforpowersystemstudiesrelatedtotheseissues,especiallywhenappliedtononinterconnectedsystemswithhighwindpowerpenetration.Detailedgenericmodelsforthreedifferentwindturbinetechnologies–ActiveStallInductionGenerator(ASIG),DoublyFedAsynchronousGenerator(DFAG)andPermanentMagnetSynchronousGenerator(PMSG)–areappliedandissuesregardinginteractionwiththepowersystemareinvestigated.Thispaperprovidesconclusionsaboutthedynamicsecurityofnon-interconnectedpowersystemswithhighwindpowerpenetrationbasedonacompletemodelrepresentationoftheindividualcomponentsofthesystem;threedifferenttypesofconventionalgeneratorsareincludedinthemodel,whiletheprotectionsystemisalsoincorporated.Theloadsheddingfollowingfaultsisfinallydiscussed.
ArticleOutline
1.Introduction
2.Rhodespowersystemin2012
3.Windfarms’faultride-throughcapability–gridvoltagesupport
3.1.FaultridethroughofDFAGwindturbines
3.2.Faultride-throughofPMSGwindturbines
3.3.Faultride-throughofASIGwindturbines
4.Simulationresults
4.1.RhodespowersystemresponsetothegridfaultinSCE
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