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1、AbstractMicrogridisasmallautonomouspowerdistributionsystem,includingdistributedgeneration,energystoragedevicesandloads.Microgridtakestheadvantagesofdistributedgenerationwhileweakeningthenegativeeffectsofdistributedgenerationonthegrid,Microgridhastheadvantageofhighpowersupplyreliability,fle
2、xibility,economyandenvironmentallyfriendly.However,themicrosourcesinmicrogridaresignificantlyinfluencedbynaturalconditions,resultingintheirrandom,intermittentanduncontrollableoutputpower·IteasilYcausesvoltagefluctuations,especiallyforthemicrogridthatisoperatedinisland·Therefore,microgridus
3、uallyconsistsofacertaincapacityofenergystorageunttandreactivecompensationdevicetomaintainthesystemvoltagestability,whichresultsintheincreaseofpowergridconstructioncost.Residentialcontroilableloadssuchasthermostaticallycontrolledloads(TCL)arethermalenergystorageequipment,whichcanstoreenergy
4、forseveralmmute8o。evenhoursandcansubstitutetraditionalenergystoragesystem·Inaddirion,comparedtotheresourcesingenerationside,Residentialloadsareextremelydecentralized,whichcanprovidereservetomakerapidresponseinJustafewminutesor1ess.Therefore,responsemadebyresidentialcontrollableloadsissigni
5、ficanttoimprovethemicrogridoperatingcharacteristicsanditsVoItagestabilitvcontr01.Focusingonresidentialcontrollableloadsrespondingtothevoltagetoimprovethevoltagestabilityinmicrogrid,thispapermakesthemamcontributionswhicharelistedasfollowing:First.thispapersummarizestheconcept,basicstructure
6、andcontroltechnologyofmicrogrid.Also,thecurrentstatusofmierogridhasbeenreviewedandtheapplicationstatusofresidentialcontrollableloadsinthemicrogridhasbeenconcluded.Second,thepaperresearchesthefeasibilityofresidentialcontrollableloadsmakingresponsetothemicrogridvoltageis.Then,basedontheabove
7、analysis,controlstrategyforresidentialcontrollableloadstorespondtothemicrogridvoltageisproposed。Throughthecontrolstrategy,residentialcontrollableloadsmakesresponsetothesystemrequirementactivelybychangingthetriggertemperatureofthecontrolsystem,providingmicrogri