基于负荷响应的微电网建模与控制

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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