学科分类
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54 个结果
  • 简介:Microgridsarelocalpowersystemsthatmayormaynotbeconnectedtothedistributionsystemandaretypicallycontrolledbythelocaloperator.Interestinmicrogridsisrisinganditislikelythatthenumberofmicrogridsconnectedtodistributionnetworkswillincrease.Currently,thereisnoconsensusonhowmicrogridswillinteractwiththedistributionsystem―theyhavethepotentialtothreatenstability,ortoassist.Howevermicrogrids,withtheiremphasisonsophisticatedcontrolinordertomanagetheirparticularchallenges,addressmanyoftheproblemsthatwillberequiredtoovercomeinrealizingthesmartgrid.Thispaperexaminessomeoftheissuesinvolvedinconnectingmicrogridstothedistributionnetworks,andillustrateshowmicrogridshaveakeyroletoplayinthedevelopmentofthesmartgrid.

  • 标签: 配电网络 智能 分配制度 控制系统 连接数 运营商
  • 简介:Theelectricindustryisbeingtransformedfromacentralizednetworktoonethatislesscentralizedandallowsmoreconsumerinteractionintheformofasmartgrid.Thereisalsoastrongcommitmentbymostcountriestoreducegreenhousegasemissionsandglobalwarmingthroughtheuseofrenewableenergyresources.Thelocallyavailablerenewableresources,suchaswind,solar,tidal

  • 标签: 电网技术 智能 电力工业 消费者
  • 简介:Thispaperpresentsthedesign,implementationandtestingofanembeddedsystemthatintegratessolarandstorageenergyresourcestosmarthomeswithinthesmartmicrogrid.Theproposedsystemprovidestherequiredhomeenergybyinstallingrenewableenergyandstoragedevices.Italsomanagesandschedulesthepowerflowduringpeakandoff-peakperiods.Inaddition,atwo-waycommunicationprotocolisdevelopedtoenablethehomeownersandtheutilityserviceprovidertoimprovetheenergyflowandtheconsumptionefficiency.Thesystemcanbeanintegralpartforhomesinasmartgridorsmartmicrogridpowernetworks.Aprototypefortheproposedsystemwasdesigned,implementedandtestedbyusingacontrolledloadbanktosimulateascaledrandomrealhouseconsumptionbehavior.Threedifferentscenariosweretestedandtheresultsandfindingsarereported.Moreover,dataflowsecurityamongthehome,homeownersandutilityserverisdevelopedtominimizecyber-attacks.

  • 标签: 可再生能源 储存能量 智能 电网 一体化 嵌入式系统
  • 简介:Thesolarphotovoltaic(PV)moduleoutputvoltagechangesaccordingtothevariationoflightintensityandtemperature.ThispaperpresentstheimplementationofanautomaticdigitalcontrollerofaDC-DCboostconverterwithoutbatteriesforasolarcellmodulebyusingaperipheralinterfacecontroller,whichformsaclosedloop,tocontroltheON-OFFperiodoftheswitchingpulse.TheoutputofDC-DCconverterismaintainedbyautomaticallyincreasingordecreasingthepulsewidth.Toproducethepulsewidthmodulation(PWM),themicrocontrollerisprogrammedaccordingtotherequireddutycycleforthepowerswitch.ThePWMONperiodisincreasedwiththedecreaseinthePVvoltageandvice-versa.TheinputvoltagetotheinverterismaintainedconstantlyandisconvertedintoanACsignalbyusingthemetal-oxide-semiconductorfieldeffecttransistor(MOSFET)H-bridgeoperatedinthesinusoidalpulsewidthmodulationmodebyusingaPIC(peripheralinterfacecontroller)microcontroller.ThegeneratedACsignalcanbeconnectedtotheACgridortotheACload.ThesimulatedresultsbyusingProteus8andhardwareimplementedresultsverifytheeffectivenessoftheproposedcontroller.

  • 标签: 数字控制器 太阳能光伏 连接系统 金属氧化物半导体场效应晶体管 发电系统 DC-DC转换
  • 简介:ApplicationofMulti-GridMethodtotheCoputationofElectromagneticScateringProblemsTXApplicationofMultiGridMethodtotheComputationo...

  • 标签: :Multi-grid METHOD Diakoptic theory INTEGRAL equation
  • 简介:DigitalnetworkedcommunicationsarethekeytoallInternet-of-Thingsapplications,especiallytosmartmeteringsystemsandthesmartgrid.Inordertoensureasafeoperationofsystemsandtheprivacyofusers,thetransportlayersecurity(TLS)protocol,amatureandwellstandardizedsolutionforsecurecommunications,maybeused.WeimplementedtheTLSprotocolinitslatestversioninawaysuitableforembeddedandresource-constrainedsystems.ThispaperoutlinesthechallengesandopportunitiesofdeployingTLSinsmartmeteringandsmartgridapplicationsandpresentsperformanceresultsofourTLSimplementation.Ouranalysisshowsthatgivenanappropriateimplementationandconfiguration,deployingTLSinconstrainedsmartmeteringsystemsispossiblewithacceptableoverhead.

  • 标签: TLS协议 智能计量 嵌入式 应用 电网 传输层安全
  • 简介:这份报纸讨论由连接到在在微格子的系统有精力存储系统和力量电子学的角色的微格子的systems.The好处形式的本地负担的分布式的代组成的未来力量系统是纸也检验让一个关键角色怎么微格子在聪明的格子的发展玩的presented.This。

  • 标签: 能源系统 电网系统 存储设备 电子控制 智能 应用
  • 简介:Thepapergivesanoverviewontheneedforsmartcouplingforbatterymanagementingridintegratedrenewableenergysystem(RES).Gridintegratedphotovoltaic(PV)batterysystem,asbeingpopularandextensivelyusedhasbeendiscussedinthepaper.SmartcouplingreferstointelligentgridintegrationsuchthatitcanforeseelocalnetworkconditionsandissuebatterypowerflowmanagementstrategyaccordinglytoshavethepeakPVandpeakload.Therefore,aneedforpredictiveenergymanagementarisesforsmartintegrationtothegridandsupervisionofthepowerflowinaccordancetothegridconditions.ThisisalsoarunningprojectattheInstituteofEnergySystems(INES),OffenburgUniversityofAppliedScience,GermanysinceJanuary,2015.Thepapershouldprovideinsightstothemotivation,needandgivesanoutlooktothefeaturesofdesiredpredictiveenergymanagementsystem(PEMS).

  • 标签: 智能集成 电池管理 电池系统 光伏 耦合 并网
  • 简介:Wirelesssensornetworks(WSNs)arebasedonmonitoringormanagingthesensingareabyusingthelocationinformationwithsensornodes.Mostsensornodesrequirehardwaresupportorreceivepacketswithlocationinformationtoestimatetheirlocations,whichneedslotsoftimeorcosts.Inthispaperweproposedalocalizationmechanismusingamobilereferencenode(MRN)andtrilaterationinWSNstoreducetheenergyconsumptionandlocationerror.Thesimulationresultsdemonstratethattheproposedmechanismcanobtainmoreunknownnodeslocationsbythemobilereferencenodemovingschemeandwilldecreasestheenergyconsumptionandaveragelocationerror.

  • 标签: 无线传感器网络 移动节点 机制 本地化 传感器节点 网格
  • 简介:Theworkpresentsademandsideresponse(DSR)model,whichassistselectricityconsumerstoproactivelymitigatepeakdemandonelectricalnetworksinEasternandSouthernAustralia.Alow-costtechnicalarrangement,whichismadeofInternetrelay,arouter,solidstateswitches,andthesuitablesoftware,isusedtocontrolelectricitydemandatuser’spremises.Themodelallowsshiftingloadsfrompeaktooff-peakperiodsinordertoreducepeaks,whichhelpstomoderatethenationalelectricaldemand.Themodelcanbeconcurrentlyusedtoaccommodatetheutilizationofrenewableenergysourcesandtheintroductionofelectricvehicles.Theresultspresentpossiblesavingsontheelectricalenergyconsumptioninthedesignatedregions.

  • 标签: 模型 电子网络 需求侧 电网 智能 电力用户
  • 简介:ThispaperpresentsanopportunityforenergymanagementwithanintegratedphotovoltaicandwindfarmfortheenergyandeconomicaspectsofthecommercialarealocatedinPutrajaya.Theenergyeconomyaccessionconformingtothewindspeed,temperature,solarirradiation,andenergyconsumptiononadailybasisistakenintoconsideration.Designanalysisisdonethroughtheindustrystandardnumericaltool.Fromtheresultanalysis,therecommendedratioofrenewableshareminimizingstresstotheelectricgridisproposed.Accordingtothesolutionsobtainedfromthenumericaldesigntool,photovoltaicisrecommendedtobemoreenergyefficientandeconomicallyviableincomparisonofthefullycrowdedwindfarm.Fromtheproposedsolutions,thephotovoltaicisabletoprovide51%oftheenergyconsumedanditcostsRM0.365perkW/h.

  • 标签: Cost grid HOMER Pro photovoltaic park
  • 简介:27-30September2011,Chengdu,Chinahttp://www.icsgce.com/2011IEEEInternationalConferenceonSmartGridandCleanEnergyTechnologies(IEEEICSGCE2011)willbeheldinSeptember27-30,2011inChengdu,China.IEEEICSGCE2011issponsoredbytheInstituteofElectricalandElectronicEngineers(IEEE),Journal

  • 标签: 清洁能源技术 IEEE 国际会议 电网 智能 电子科技大学
  • 简介:Automationhasarrivedinthelowvoltagegriddomain.Inthenextfewyears,thesecondarysubstation-atthebarriersofmediumandlowvoltagegrids-willthusbeupgradedtoenablenovelfunctions.Inthispaper,wepresentvarioussmartgridapplicationsrunningonsuchintelligentsecondarysubstations(iSSN)includingtheirinteractionwitheachother.Weintegrateenergyconsumptionandproductiondata,aswellasforecasts,sensedfromthesmartbuildings’energymanagementsystems(BEMSs)intotheoperationofthelowvoltagegrid.Asuitableframeworkforthosemodularapplicationsincludesfeaturestoinitiatetheirinstallation,update,removal,theremoteoperatorsite,andnotrequiringstaffon-siteforsuchtypicalreappearingmaintenancetasks.

  • 标签: ASYNCHRONOUS communications distributed information systems ENERGY
  • 简介:Thispaperdiscussestheapplicationsofahybridmulti-agentframeworkforself-healingapplicationsinanintelligentsmartgridsystemfollowingcatastrophicdisturbancessuchaslossofgeneratorsorduringsystemfault.Theproposedhybridmulti-agentframeworkisahybridofbothcentralizedanddecentralizedschemetoallowdistributedintelligentagentinthesmartgridsystemtomakefastlocaldecisionwhileallowingtheslowercentralcontrollertojudgetheeffectivenessofthedecisionmadebythelocalagentsandtosuggestmoreoptimalsolutions.

  • 标签: 多智能体 电网系统 混合式 多Agent 框架 自修复
  • 简介:Thispaperpresentsthedesignandimplementationofanenergymanagementsystem(EMS)withwavelettransformandfuzzycontrolforaresidentialmicro-grid.Thehybridsysteminthispaperconsistsofawindturbinegenerator,photovoltaic(PV)panels,anelectricvehicle(EV),andasupercapacitor(SC),whichisabletoconnectordisconnecttothemaingrid.Thecontrolstrategyisresponsibleforcompensatingthedifferencebetweenthegeneratedpowerbythewindandsolargeneratorsandthedemandedpowerbytheloads.Wavelettransformdecomposesthepowerdifferenceintoasmoothedcomponentandafastfluctuatedcomponent.Thecommandapproachusedforfuzzylogicrulesconsidersthestateofcharging(SOC)ofEV,renewableproduction,andtheloaddemandasparameters.Furthermore,thecommandrulesaredevelopedinordertoensureareliablegridwhentakingintoaccounttheEVbatteryprotectiontodecidetheoutputpoweroftheEV.ThemodelofthehybridsystemisdevelopedindetailunderMatlab/Simulinksoftwareenvironment.

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  • 简介:摘要绿地集团作为房地产行业综合排名第五的大型国有企业于2015年8月成功借壳上市,本文通过研究绿地集团由于政策模糊和交易方式不明确使得在借壳上市过程中存在的税企争议和不同理解下借壳双方的税务差异,为其他拟通过借壳上市的企业提供一定的参考和借鉴。

  • 标签: 借壳上市 并购重组 企业所得税
  • 简介:<正>说起深圳市光明集团有限公司(以下简称"光明集团"),很多人脑海里浮现的可能是光明集团旗下的晨光牛奶、光明农场等品牌产品。很少人知道光明集团的主营业务除了乳业、生态观光农业外,其实还涉猎了高新技术产业、工业和房地产业等行业。实际上,进入二十一世纪后,光明集团董事会及经营班子充分认识到企业战略性改组和产业转型的重要性,把自主创新作为未来发展的主导战略,确立了"3+2"模式的发展定位,即将集团

  • 标签: 铸造质量 晨光牛奶 战略性改组 高新技术产业 房地产业 主导战略