电动汽车换电站储能系统微电网运行控制策略-研究

《电动汽车换电站储能系统微电网运行控制策略-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、硕士学位论文AbstractAlongwithextensiveuseofelectriccars，electricvehicle(EV)chargingstation，asthesourceofenergysupply，developsrapidlyinthesametime．Inordertorelievevalley-to-peakinurbandistributionnetwork，EVchargingstationneedstobeimplementedtoavoidsbringingmoreseriousloadf

2、luctuations；atthesametime，inordertopeakonthedistributionnetwork、controlflowefficient、reducelossandrelievecapacityofpressure，distributedenergystoragestationneedstobuild．Therefore，ifthedistributedEVchargingstationplaysarolenotonlyinsupplyingelectricvehiclebattery，buta

3、lsoasacontingencyreservepower，theinvestmentcostsofenergystoragewillreducesignificantlyandtheurbanlandresourceswillbesaved．EachindividualEVchargingisequaltoasmallpowergrid：itcanoperateingrid—connectedmode，andalsosupplypowertoEVindependently．Sosuchacontrolledsystemisc

4、alledmicrogrid．Asaneffectivesupplementtothegridandaneffectiveutilizationformofdistributedenergy，thedevelopmentofmicrogridhaschangedthesinglepowersupplypatternandhasgreatlyimprovedpowersupplyreliabilityandefficiency．Coreworkisconcentratedintheseareas：(1)Thispapercomb

5、inescontroldemandofthemicrogridandcharacteristicsofDG．studiesonmicrogridcontrolmethodssuchasmaster—slavecontrol、equivalentcontrolandhierarchicalcontrol，illustratestheprincipleandrightconditionsofconstantpowercontrol(PQcontr01)、droopcontrol、pourdroopcontrol、constantv

6、oltageconstantfrequencycontrol(V／fcontr01)．(2)Whenpowerstationisinislandedoperation，theinverteroutputvoltageamplitudeandfrequencyfluctuatingfollowsunstableloads．Formaintainingthestabilityofvoltageandfrequency，animproveddynamicself-adjustingdroopcontrolstrategyisprop

7、osedonthebasisofthetraditional．ThemethodconstantlyrevisesP—E&Q-fcurvelocations，maintainsthefluctuationsofvoltageamplitudeandfrequencywithinasmallthresholdunderabruptloadvariation，andmakessystemstable．Underthevariationcharacteristicsoffrequency，voltageandcurrent，thet

8、raditionalandimproveddroopcontrolstrategyareanalyzedbasedonanislandingmodeestablishedwithMatlab／Simulink．Theresultsshowthattheproposedmeth