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1、重庆大学硕士学位论文英文摘要ABSTRACTWiththeenergycrisisandenvironmentalpollution,newcleanenergylikewindpowerarehighlyvalued.However,large-scalewindpowerwillaffectthesecurityandstabilityofthegridduetoitsintermittenceandvolatility.Itwouldreducetheimpactonpowersystemifthewindpowerwasconnect
2、edtothepowersystemasamicrogrid,storagesysteminmicrogridcaneffectivelyreducethefluctuationscausedbythewindpower.Storagesystemcanstabilizethefluctuationsofactivepower,whichplaysanimportantroleinthestableoperationofmicrogrid,reasonableconfigurationofenergystorageisimportanttoi
3、mprovereliabilityandeconomyofmicrogrid.Thispaperwasfocusedonthepowerbalanceanalysisinisolatedmicrogrid,reliabilityassessmentconsideringenergystorageandcapacityoptimizationofhybridenergystoragesystem.Thefollowingworkwascarriedout:Tocharacterizethefluctuationofwindpowerandloa
4、dinmicro-gridincludingwindfarm,microturbineandenergystorage,thedefinitionofdiscrepancypowerinmicrogridwasgiven,whichisthedifferencebetweenloadandwindpowerfluctuations;Accordingtothefluctuationsofdiscrepancypower,thediscrepancypowerdecompositionmodelusingDiscreteFourierTrans
5、formationwasestablishedinmicrogrid,whichistodecomposethediscrepancypowerintolowfrequencyandhighfrequencycomponentsandthehighfrequencycomponentwasdefinedasimbalancepower.Meanwhile,microturbinewasusedtoprovidethelowfrequencycomponentandenergystorgesystemtobalancethehighfreque
6、ncycomponent,whichisproposedasMT-ESjointoperatingstrategy.Takinganislandmicrogridasanumericalexample,theresultsshowedthat:Underthepremiseofmeettingtheloaddemandandwithoutincreasingfuelconsumption,theproposedjointoperatingstrategycaneffectivelyreducethestoragesystemcapacityc
7、onfigurationrequirement.BasedontheMT-ESjointoperatingstrategy,asix-stateenergystoragesystemreliabilitymodelwasestablished,theenergystoragesystemchargeanddischargepoweradjustmentstrategywasproposedbasedonthismodel.Consideringtheabundanceindicesandwindpowerabsorbilityindicato
8、rsofmicrogrid,themicrogridreliabilityevaluationmodelwasestablished.Systemchronolog
