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1、...基于分层控制的独立微电网有功功率稳定研究AbstractNowadays,theenergyandenvironmentproblemshaveattractedmanyattentionsofthe
society.Theexplorationofthenewenergytechnologyisconstantlyadvancing.Micro-grid
firstlyputforwardbyAmericanisanewwaytotakeadvantageofthenewenergy.Micro-grid
cansolvetheadverseef
2、fectscausedbythatthelarge-scaledistributedgenerationsare
incorporatedelectrifiedwirenetting,andalsocanmakefulluseoftheenergyofremoteareas
toestablishanindependentmicro-gridsystemprovidingelectricenergyforthelocalusers.
Theindependentmicro-gridusuallyconsistsofmicro-turbinespowerg
3、enerations,
photovoltaicpowergenerations,windpowergenerations,energystoragedevicesandsoon.
Firstly,asthemainpowerinmicro-grid,themicro-turbinehassomeshortcomingsthatits
capacityislimitedanditsinertialisdeficiencyanditsresponseisslow,sotheactivepower
vacancyofsuddenloadsandthenewe
4、nergycan’tbetimelycompensated.Secondly,thenew
energyisgreatlyaffectedbytheweatherandtheenvironment.Itshouldbeeffectivelysolve
thateachgenerationandloadsarecoordinated,allocatedandmanaged,inordertoensurethat
theindependentmicro-gridoperatesstablyandefficientlytoprovideuserswiththe
5、
high-qualitypowerenergy.Inthisthesis,theobjectofresearchistheindependentmicro-gridwithrelatively
commonform.Itincludesamicro-turbinespowergeneration,awindpowergeneration,a
photovoltaicspowergeneration,abatterypack,userloadsandunloadings.Firstly,theDC
invertercircuitisestablished
6、.Thecontrolmethodsoftheinverterisdesignedanddebugged.
ItincludesVoltageandfrequency(V/f)controlandtheactiveandreactivepowercontrol(PQ).
Secondly,inordertohighlightthefocusofthethesis,themicro-powerlikethemicro-turbine,
theWindTurbineandthephotovoltaicaresimplifiedbyV/fandPQcontro
7、lmethods,and
thenthemicro-sourcemodelsareestablished.Thirdly,theactivepowervacancyisestimated
bycurrentjumpcausedbytheloadmutations.Thismethodisfasterthanthatofthechanges
ofthefrequency,andtheerroriswithintheacceptablerange,thusprovidingareliable
referencefortheoutputofthebattery
8、packandtheincreaseordecreaseoftheunloadi
