考虑随机特性的微电网电源优化配置

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1、Abstract曼曼量曼曼曼曼曼曼曼曼舅曼曼曼鲁曼皇i——i———————————————————————————————————一————．Li曼曼!曼Wjththedevelopmentofeconomic，thedemandforelectricityisgrowing，andthescaleofthepowergridsisexpanding．Asthegridsbecomemorecomplex，thedrawbacksoflargepowergridarebecomingmoreandmoreapparent．To

2、acertainextent，theproposionofthemicrogridconceptalleviatestheproblemsbroughtaboutbythepowergridexpansion．Asaneffectivecomplementoflargepowergrids，themicrogridplaysanimportantroleinimprovingthereliabilityofpowersupply，implementingtheadvantagesofdistributedgenerations

3、andpromotingthrperformanceofthegrids，whichhasbecomeoneofthemaindirectionsofthedevelopmentofpowersystem．Andproperconfigurationofmictogeneration’Stype，locationandsizewhichmakesthesystemoperatesafelyandeconomically,iSanimportantproblemthatmustbesolvedwithmicrogrid’Sdev

4、eloping．Consideringthecharacteristicsofmicrogrid，theoptimalsitingandsizingofmicrogenerations(MG)inamicrogridisstudiedinthispaper．Theoverallsystem’Sreliabilityandeconomyisconsidered．Andstochasticnatureofthemicrogrid，suchastherandomnessnatureofwindandsolarenergy，istak

5、enintoaccountaswell．Themainworkispresentedasfollows：(1)Accordingtothedifferentcharacteristicsunderdifferentoperatingmodes(stand—alonemodeandgrid—connectedmode)ofmicrogrid，thedifferenceinconfiguretheMGofthetwomodesisdiscussed．Andthesolutionideasofoptimalproblemareana

6、lysed．(2)Themodesofmainmicrogirddevicesarebuilt．ThemethodofprobabilisticpowerflowbasedonMonteCarlosimulationinamicrogridisproposed．(3)Aimingatstand—alonemodemicrogrid，amathematicalmodelforoptimalsizingofDGisestablished．Themodeltakesthetypes，sitesandsizesofDGasvariab

7、les，minimumoverallcostasobjectivefunctionandreliabilityindexsuchasnodevoltageandlossofenergyprobabilityasmainconstraints．Andthereliabilityindexofagenerationconfigurationschemeiscalculatedbyprobabilisticpowerflow．Theparticleswarnloptimization(eso)algorithmisproposedt

8、osolvetheoptimizationproblem．Finally，a14-nodesystemcasestudyisusedtovertifythecorrectnessandpracticalityofthemethodproposedabove．(4)Amathe