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1、-------AbstractAbstractAsthedemandforenergyandenvironmentalissuesarebecomingincreasinglyprominent,developinglow-carboneconomyandconstructingecologicalcivilizationtoachievesustainabledevelopmenthasarousedgeneralinterest.Exploitingcleannon-polluting,renewableenerg
2、yisanimportantstrategicdecisiontochallengesbroughtbyenergyandenvironment.Microgridisabletointegratenewenergypowergenerationunitwithstorageunitandloadstogether,whichcanworkonthegrid-connectandstand-alonemode,easingpressureoflargegrid,maximizingtheadvantagesofdist
3、ributedpowerinaspectsofeconomic,environmentalandsoon.Inordertoensuremicrogridoperatereliably,economicallyandenvironmentally,generation’stype,locationandsizemustbeallocatedreasonably.Consideringthecorrelationbetweenwindandphotovoltaic(PV)power
outputsandrelevanci
4、esamongdifferentloads,theoptimalsittingandsizingof
microgridgenerationsinamicrogridworkonthegrid-connectandstand-alonemode
isstudiedinthispaper.Themainworkispresentedasfollows:(1)Accordingtothecorrelationsbetweendistributedgenerationspoweroutputs
andrelevanciesa
5、mongdifferentloadsofmicrogrid,Copulatheoryisintroducedto
establishprobabilisticmodelsforthepowergenerationandtotalloadsrespectively.
Historicalsimulationmethodisusedtoobtainvalueatriskofmicrogridinorderto
realizetheriskassessmentofmicrogrid.Consideringuncertaint
6、ies,alowcarbon
pricemodelisbuiltbasedonMonteCarlomethod.(2)Totalcostsofthemicrogridundergrid-connectedmodeistakenasobjective
functioninwhichoperatingcost,low-carboneffect,electricityexchangebetween
maingridandmicrogirdisconsidered.ImprovedInvasiveWeedOptimizatio
7、n(IIWO)
isappliedtofindtheoptimalconfiguration.Resultsshowthatthealgorithmhasa
goodconvergenceandastrongglobaloptimalcapability.Atlast,acasestudyis
presentedtoanalyzecorrelationproperties,economy,reliabilityandadvantagesof
thealgorithm.(3)Underthepremiseofmeetin
8、greliabilityconstraints,acomprehensive
economiccostfunctionconsideringnetlossexpenses,penaltiesduetooutageand
wasteofenergyisestablished,themodelandmethodologyisdemon
