含微网的配电网可靠性评估模型与算法的研究

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1、重庆大学硕士学位论文II英文摘要ABSTRACTAspeoplerequirethehigherpowersupplyandreliability,thereliabilityofdistributionnetworkhavebeenincreasinglyconcernedandemphasized.Micro-gridhasbecomeahotresearchspotthatdrewworldwidescientists'attentionforthereasonthatitcanusethedistributedpowergenera

2、tiontechnologytoimprovepowersupplyreliabilityandtoalleviategrowingenergycrisisandenvironmentalpollutionpressure.However,Micro-gridconvertsconventionalradialdistributionnetworkwithsinglepowersupplytoanewonewithallkindofdistributedgenerators.Meanwhile,theoutputsofthesedistri

3、butedgeneratorsarenotdeterministicbecauseoftheintermittencyofrenewablepower,suchaswindandsolarenergy.Soitbringsalotproblemsinceweevaluatethereliabilityofdistributionnetworkwithmicro-grid.Thispepperfocusonthereliabilityassessmentofdistributionnetworkwithmicro-grid,themainwo

4、rkandresultsarelistedbelow.①Accordingtothefeaturesofclosed-loopdesignandopenloopoperationofdistributionnetwork．Afastreliabilityevaluationalgorithmforlargescaledistributionsystemsbasedonbackward/forwardsweepmethodisproposed．Thebackward/forwardsweepformulaetocalculatethereli

5、abilityindicesofnodesindifferentbranchesaregiven．Outageofnodecausedbythefailureofdownstreamcomponentshasbeencalculatedduringforwardsweeping；then，ithasbeencorrectedduringbackwardsweepingconsideringtheinfluenceofthefailureofupstreamcomponents．Byreasonofcarryingoutonceoftopol

6、ogicalanalysisandback/forwardsweepcalculation，time-consumingforreliabilityassessmentisgreatlyreduced．Thealgorithmcanbeusedtoevaluatereliabilityofdistributionnetworkwithmultiplebackuppowerswhichmakesithasabetterengineeringpracticability．Thefeasibilityandvalidityofthepropose

7、dalgorithmisverifiedbysimulationresultsoftheexamplesystem．Theresultsshowthattheproposedalgorithmisfasterthantheexistingalgorithms．②Equivalentmodelsofmicrosourceforeachloadpointhavebeenbuiltconsideringuncertaintyofdistributedgeneratorswhichiscausedbyintermittentrenewablepow

8、er.Firstly,amulti-stateMarkovamodelisbuiltfordistributedgeneratorwithrenewableenergy;then