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ID:34188799
大小:8.90 MB
页数:68页
时间:2019-03-03
《微电网多元复合储能建模与协调控制策略研究》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、ABSTRACTMicrogfidiscommonlydefinedasanewtypeofintegratedpowersystem,consistingofdistributedgenerators(nGs),energystorages(ESs)andinterconnectedloadsandcontroldevices,whichcanoperateingdd-connectedmodeorinintentionalislandmode.WheretheDGsandESsareusuallysettogethertoavoidthethreatcaus
2、edbythepowerfluctuationproducedbyintermittedandrandomrenewablesources(e.g.,wind,solar).Futhtmore,theESsCanprovidestabilepowertomeetthemicrogird’Sdemandtomaintainitsvoltageandfrequencylevels.Inaword,theESspalyanimportantroleinmicrogridandthispaperwillfocusonthemicrogridwithmulti-eleme
3、ntcompositeenergystorages,andtheoptimalpowerallocationandoperationstrategyofthemaredetailedasfollowing:Fistly,atypicalenergystoragesystemisintroducedthroughtwoaspects:1)thebasicsourceunit;2)thepowerconvertionsystems(PCS).Fortheformer,theclassicalequivalentmodelsoflithiumbattery,lead—
4、acidbattery,liquidflowbattery,supercapacitorandflywheelenergystorageareestablishedtoanalysetheircharacteristics.Forthelatter,thegeneraltopologies,mathematicalmodelandbasiccontrolmethods(i.e.,PQcontrol,V/fcontrolanddroopcontrol,inversedroopcontr01)ofthePCSareintroducedindetail.Inheren
5、tly,acomprehensivecontrolmodelintegrationofthesefourkindsofcontrolmethodsisputforwardtorealizetheoptimalpowerallocationandcoordinationofthemultiplecompositeenergystorages.NexgESswithdifferentcharacteristics(e.g.,battery,supercapacitor)areconnectedtothegddthroughacommonPCStoworkasacom
6、positeenergystorage,andthepowerallocationalgorithmisthekeypoint.Inthispaper,apowerallocationalgorithmbasedonSOCadaptivefeedbackisputforwardtooptimizetheoperationofcompositeenergystorages.Comparedwiththetraditionallow—passfilteringalgorithmandpresetSOCfeedback,theadaptiveSOCfeedbackco
7、ntrolmoduleCanregulatetheSOCofbatteryorsupercapacitortobethepresetvaluefinally,SOthatthecompositeenergystoragesystemCankeeptheoutputabilitytoplayeffectivelyinthenext.Besides,thispaperdiscussestheoperationstrategyofmulti—elementcompositeenergystoragesysteminmaster-slavecontroledmicrog
8、ridorpeer-to
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