交直流混合微电网中双向c2fdc功率变换器控制策略-研究

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1、万方数据太原理工大学硕士研究生学位论文IV万方数据太原理工大学硕士研究生学位论文RESEARCH0NTHECONTROLMETHODOFINTERLINK—CONVERTERINHYBRIDMICROGRIDABSTRACTAlongwiththegrowingdemandforenergyandtheenvironmentproblem,speeduptheconstructionofthenewenergybecomesoneoftheimportantobjectivesofthedevelopme

2、ntofnationaleconomicconstruction．Astheworld’Slargestdevelopingcountry,china’Senergyproductionandconsumptionishuge．Duetothecontinuedgrowthoftheenergysupply,itprovidesimportantsupportforchina’Seconomicdevelopment．Withthegradualimprovementoftherequirementtot

3、heenvironment，itisfacingabigtestforthepowersystemwhichismainlycomposedofthermalpower．So，todevelopnewenergypowersystemsasphotovoltaicandwindpowerisabigtrend．ThedistributedgenerationandmicrogridresearchhasbecomeoneofthecoresubjectsinceEuropeandtheunitedstat

4、esfirstputforwardthedevelopmentofmicrogrid．ThediversificationofenergysupplyandenvironmentallyfriendlyfeaturesmakethemicrogridaidealpowersupplywayToachievetheproperpowerbalanceandimprovethesystemstability,thispaperproposedanewdropcontrolmethodforinterlinki

5、ngconvertersinhybridmicrogrid．V———莶堡墨三奎兰堡主堡壅生堂焦堡奎万方数据Inthispaper,themainworkisinthefollowingrespects．(1)Ahybridmicrogirdtopologywhichformedbytyingadcandanacsub—gridtogetherthroughinterfacingconverterwereusedinthispaper．Thehybridmicrogridhasbothacanddcmicr

6、ogridadvantages，itsupportsplugandplayandcanalsoadjustthepowerbalanceautomatically,thecontrolmethodssolelybaseonlocalmeasurementsexhibitasuperiorredundancy,astheydonotrelyoncommunicationforreliableoperation．Duetotheuseofthehybridmicrogirdtopology,thesystem

7、capacityofmicrogirdhasbeenexpanded．Meanwhile，thenewenergyutilizationandthereliabilityofthesystemhasalsobeenimproved．(2)Forthehybridmicrogridsetupinthispaper,itsrunningmechanismhasbeenanalyzedindetail，andtheinterlinkingconverteroperatingcontrolgoalhasalsob

8、eendesignedbasedonmicrogridpowermanagement．HybridmicrogridconnecttothepowergridthroughthePCCpointundergrid—connectedmode．Energycanbeexchangedbetweenthetwosystemwhennecessarytoensurethestableoperationofthesystem．Itca