孤岛微网在故障恢复期间的负荷支撑方案-研究

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1、华中科技大学硕士学位论文ABSTRACTMicrogridtechnologyprovidesapromisingsolutiontoovercomethepowergrid’svulnerability.Whenlargepowergridseparatesintoseveralpartsorevenblackouts,activeislandingoperationmodeoftheMicrogridisexpectedtoensurepowersupplyofimportantloadsc

2、ontinuously.Therefore,Combiningwiththeengineeringpractice,weshouldstudyonloadsupporttechnologybasedonMicrogridinresponsetoalarge-scalepoweroutagesandotherkindsofaccidents.Andthisresearchwillbecometheemphasisinthefieldofelectricpower.AndChinaisgoingto

3、buildastrongsmartgridonthebasisofthedistributedgenerationofMicrogridconstructionvigorously,whichprovidesagoodapplicationprospectandbroadplatformforthemassivepowercutoffinourcountryundertheloadsupportresearch.Firstly,thisarticlegivesanintroductiontoMi

4、crogridloadsupportingcontroltheorynowadaysindetails,includingMicrogridpreventionandcontroltheory,MicrogridemergencycontroltheoryandMicrogridreconfigurationtheory.AndMicrogridreconfigurationtheoryisespeciallyexplained.Microgridreconfigurationproblemco

5、uldbeseenasanonlinearoptimizationobjectivefunctionsolvingproblem,whicheffectivelysupportimportantloadsinthecaseofblackouts.Andalso,wecomparethesimilaritiesanddifferencesbetweenpowergridemergencycontrolandMicrogridreconfiguration.But,atthesametime,the

6、articlepointsoutthatthecurrentcontroltheoryundertheextremenaturaldisastersisnotappropriateforislandoperationmodeofMicrogrid.Inthisarticle,anovelMAS-basedapproachformicrogridreconfigurationispresentedinordertoachieveoptimalobjectiveundersystemconstrai

7、nts.Bycoordinationbetweenagents,therelevantagentscompletesthetasksbyregulation.Thisarchitectureneednoiterationcalculationandhashighengineeringpracticability.TestcaseresultverifiedthefeasibilityoftheproposedMASonmicrogridreconfiguration.Finally,coordi

8、natedcontrolstrategyofisolatedMicrogridundertheemergencyoperationarestudiedandthecontrolstrategyisappliedtoreutilizethesparenon-dispatchableDGinisolatedMicrogrid,whichcouldgivefullplaytothenon-dispatchableDGinthefieldofloadsupportduringloadrecovery.T