基于模糊机理的微电网逆变电源控制系统仿真研究

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1、太原理工大学硕士研究生学位论文SIMULATIONSTUDYONMICRO．GRIDPOWERINVERTERCONTROLSYSTEMBASEDONFUZZYCONTROLSTRATEGYABSTRACTAtpresent，powersystemaccidenthasalreadybroughthugeimpacttothesafeandstableoperationoflargepowergrid，theUHVpowergridhasdevelopedalottointerconnectpoweroptima

2、lallocationofresources，meanwhile，asausefulcomplementofthelargepower鲥d，themicro-gridhasbecomeanimportantsupplementaryformostofthecountriestosolvethesecurityandreliabilityproblemsinpowersystem，ithasaverypracticalsignificancetomanageandacceptnewenergyinshapeofmi

3、cro—gridButpeoplefoundthatitisdifficulttocoordinatesafeandstableoperationbetweenmicro—gridandthelargepowergrid，especiallywhenthemicro—gridhaspowersystemfault,itmaybranghtgreaterimpacttOthelargepowergrid，therefore，itisparticularlyimportanttodesignaccurateandef

4、fectivecontrolsystemBasedontheresearchofmicro-grid，PQcontrolstrategyandV／fcontrolstrategyhavebeendiscussedindetail，meanwhilethecontrolstrategiesofdifferentstructureanddifferentoperationmodeofthemicro—gridhasbeensuppliedinreasonThedetailedresearchesareasthllow

5、s：(1)TheworkingprinciplesofPecontmIandWfcontrolhavebeenintroducedpreliminarily．InthePQcontrolmode，thevoltageandfrequencyofmicro—gridissuppliedbylargepowergridtomaintainstableoperation，查星堡三丕兰堡主堑茎圭芏堡堡墨micro‘gridonlyneedtodeliveryorabsorbactivepowerandreactivepo

6、werfollowtheinstructionstocomplementaryshortfallwiththelargepowergrid；intheVJfcontrolmode，thevoJtageandfrequencyofmicro-grldisnotsuppliedbylargepowergridanymore，basedonP-f、Q-Udroopcharacteristic，themicro。sourcesupplyreferencevoltageandfrequencyofitsownafterge

7、ttheoutputpowerofeverymicro—source，thenadjustthevoltageandfrequencyinturnThemathematicalmodeofmicro-sourcehasbeenestablished，becausemicro—sourceismainlydistributepower，itisuncontrollableforthelargepowergrid，sothemicro‘sourceisaccessedbythepowerelectronicdevic

8、esgenerally，throu曲thecontrolofelectronicdevices，torealizethecontrolofmicro．sourceThree‘phase血ll-bri电evoltageinverterhasbeenappliedinthepaper．(”ThePQcontrolsystemhasbeendesigned．includetwo