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ID:34186897
大小:8.85 MB
页数:93页
时间:2019-03-03
《基于模糊机理的微电网逆变电源控制系统仿真-研究》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、太原理工大学硕士研究生学位论文SIMULATIONSTUDYONMICRO.GRIDPOWERINVERTERCONTROLSYSTEMBASEDONFUZZYCONTROLSTRATEGYABSTRACTAtpresent,powersystemaccidenthasalreadybroughthugeimpacttothesafeandstableoperationoflargepowergrid,theUHVpowergridhasdevelopedalottointerconnectpoweroptimalalloc
2、ationofresources,meanwhile,asausefulcomplementofthelargepower鲥d,themicro-gridhasbecomeanimportantsupplementaryformostofthecountriestosolvethesecurityandreliabilityproblemsinpowersystem,ithasaverypracticalsignificancetomanageandacceptnewenergyinshapeofmicro—gridButp
3、eoplefoundthatitisdifficulttocoordinatesafeandstableoperationbetweenmicro—gridandthelargepowergrid,especiallywhenthemicro—gridhaspowersystemfault,itmaybranghtgreaterimpacttOthelargepowergrid,therefore,itisparticularlyimportanttodesignaccurateandeffectivecontrolsyst
4、emBasedontheresearchofmicro-grid,PQcontrolstrategyandV/fcontrolstrategyhavebeendiscussedindetail,meanwhilethecontrolstrategiesofdifferentstructureanddifferentoperationmodeofthemicro—gridhasbeensuppliedinreasonThedetailedresearchesareasthllows:(1)Theworkingprinciple
5、sofPecontmIandWfcontrolhavebeenintroducedpreliminarily.InthePQcontrolmode,thevoltageandfrequencyofmicro—gridissuppliedbylargepowergridtomaintainstableoperation,查星堡三丕兰堡主堑茎圭芏堡堡墨micro‘gridonlyneedtodeliveryorabsorbactivepowerandreactivepowerfollowtheinstructionstocomp
6、lementaryshortfallwiththelargepowergrid;intheVJfcontrolmode,thevoJtageandfrequencyofmicro-grldisnotsuppliedbylargepowergridanymore,basedonP-f、Q-Udroopcharacteristic,themicro。sourcesupplyreferencevoltageandfrequencyofitsownaftergettheoutputpowerofeverymicro—source,t
7、henadjustthevoltageandfrequencyinturnThemathematicalmodeofmicro-sourcehasbeenestablished,becausemicro—sourceismainlydistributepower,itisuncontrollableforthelargepowergrid,sothemicro‘sourceisaccessedbythepowerelectronicdevicesgenerally,throu曲thecontrolofelectronicde
8、vices,torealizethecontrolofmicro.sourceThree‘phase血ll-bri电evoltageinverterhasbeenappliedinthepaper.(”ThePQcontrolsystemhasbeendesigned.includetwo
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