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1、ABSTRACTMicrogridisasmalldistributionsystemappliedtothedistributedpowersupply,canberunwiththeexternalgrid，andcanalsoruninislandoperationwhenthefaultappearinthegrid．Microgrid，withresidentialloads，isclosetotheenduserswhoaremostforcommercialandresidentialusers，andtheelectricequipmentism
2、ostlyairconditioningandrefrigeratorsandotherhomefurnishingtypethermostatically-controlledloadwithflexibleworkingmode，thistypeloadisaconstanttemperatureheatercontrolledload，itsdrivingpoweralmostusesACasynchronousmotorcomparingtoresistiveload，hasalargerproportionandneedreactivepowerexc
3、itation．Soaftertheloadresponsecontrol，itcanbeusedasinactiveandreactivepowerreserve．Sincetheproblemofnetworklossofpowersystemisprominent，andreactivepowercompensationisaneffectivemeansinreducingthelineloss．Therefore，thispaperusesBPneuralnetworktoprocedreactivepoweroptimizationofmicrogr
4、id，combinedwithloadresponse，inthestudyofreactivepoweroptimizationmethodoflargepowergridbasedontheMATLBA2013aenvironment．Usingthemethodofequivalentmodelingoftraditionalmicrogrid，analysisedtheP／Q，V／fanddroopcontrolstrategyofthemicropower,andalsopresentedthemaster-slave，peer-peerandlaye
5、ringcontrolmethodsofmicrogrid，studiedthedifferentcontrolstrategiesoftheenergystoringdeviceundergridconnectedmicrogridandislandedmicrogrid，meanscurrentandwfcontrolstrategy,andbuiltamicrogridsimulationplatformintheMATLAB／Simulinkenvironment，thesimulationresultsverifiedtherationalityand
6、feasibilityofthecontrolstrategy,andthevoltageandfrequencyofislandedmicrogridcouldmeetthenationalstandards．Takingtherefrigeratorasanexample，thispaperproposedakindofvariableparticipationcontrolstrategysuitableofthermostatically—controlledloads，andestablisheditsmathematicalmodel，constru
7、ctedthermostatically-controlledloadmodule，runinthemicrogridsimulationplatform．Thesimulationresultsshowedthat，improvingtheparticipationofuserswastoreducetheusercomfortfortheprice，userscouldchooseappropriateparticipationcoefficientaccordingtothecomfortrequirements．Comparingtheresultswi
8、thandwithout
