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．Toacertainextent，theproposionof

2、themicrogridconceptalleviatestheproblemsbroughtaboutbythepowergridexpansion．Asaneffectivecomplementoflargepowergrids，themicrogridplaysanimportantroleinimprovingthereliabilityofpowersupply，implementingtheadvantagesofdistributedgenerationsandpromotingthrperformanceofthegrids，whichhasbecomeoneofth

3、emaindirectionsofthedevelopmentofpowersystem．Andproperconfigurationofmictogeneration’Stype，locationandsizewhichmakesthesystemoperatesafelyandeconomically,iSanimportantproblemthatmustbesolvedwithmicrogrid’Sdeveloping．Consideringthecharacteristicsofmicrogrid，theoptimalsitingandsizingofmicrogenera

4、tions(MG)inamicrogridisstudiedinthispaper．Theoverallsystem’Sreliabilityandeconomyisconsidered．Andstochasticnatureofthemicrogrid，suchastherandomnessnatureofwindandsolarenergy，istakenintoaccountaswell．Themainworkispresentedasfollows：(1)Accordingtothedifferentcharacteristicsunderdifferentoperating

5、modes(stand—alonemodeandgrid—connectedmode)ofmicrogrid，thedifferenceinconfiguretheMGofthetwomodesisdiscussed．Andthesolutionideasofoptimalproblemareanalysed．(2)Themodesofmainmicrogirddevicesarebuilt．ThemethodofprobabilisticpowerflowbasedonMonteCarlosimulationinamicrogridisproposed．(3)Aimingatsta

6、nd—alonemodemicrogrid，amathematicalmodelforoptimalsizingofDGisestablished．Themodeltakesthetypes，sitesandsizesofDGasvariables，minimumoverallcostasobjectivefunctionandreliabilityindexsuchasnodevoltageandlossofenergyprobabilityasmainconstraints．Andthereliabilityindexofagenerationconfigurationschem

7、eiscalculatedbyprobabilisticpowerflow．Theparticleswarnloptimization(eso)algorithmisproposedtosolvetheoptimizationproblem．Finally，a14-nodesystemcasestudyisusedtovertifythecorrectnessandpracticalityofthemethodproposedabove．(4)Amathe