A novel adaptive current protection scheme for distribution systems with distributed generation

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1、ElectricalPowerandEnergySystems43(2012)1460–1466ContentslistsavailableatSciVerseScienceDirectElectricalPowerandEnergySystemsjournalhomepage:www.elsevier.com/locate/ijepesAnoveladaptivecurrentprotectionschemefordistributionsystemswithdistributedgenerationa,

2、⇑aaabJingMa,XiWang,YagangZhang,QixunYang,A.G.PhadkeaStateKeyLaboratoryofAlternateElectricalPowerSystemwithRenewableEnergySources,NorthChinaElectricPowerUniversity,Beijing102206,ChinabVirginiaPolytechniqueInstituteandStateUniversity,Blacksburg,USAarticleinf

3、oabstractArticlehistory:AnadaptivecurrentprotectionschemeisproposedfortheprotectionofpowersystemswithpenetrationReceived20November2011ofdistributedgeneration(DG).Inthisscheme,steadystatefaultcurrentoftherelatedpowertransmis-Receivedinrevisedform23June2012s

4、ionlinesisderivedfromsteadystatenetworkequivalentreduction.Then,settingscriteriaforadaptiveAccepted5July2012primaryandbackupprotectionareestablishedonthebasisofthesteadystatefaultcurrent.Thesimu-Availableonline9August2012latedresultsofarealisticpowernetwor

5、kverifytherangesofadaptiveprimaryandbackupprotectionareimmunetoimplementationofDGandthefaulttypes.Furthermore,comparedwithtraditionalKeywords:currentprotectionschemes,theproposedmethodhasextendedtheprimaryandbackupprotectionFaultcomponentregionsconsiderabl

6、y.AdaptivecurrentprotectionDistributedgenerationÓ2012ElsevierLtd.Allrightsreserved.Equivalentreduction1.Introductionused,arebeingconnectedtothegrid.TheimplementationofDGcancreatedifficultiesfortheexistingpowersystemprotectionProtectivedevicesplayacriticalro

7、leinpowersystemsbymin-schemesandcauseprotectiondevicestooperateincorrectlyimizingequipmentdamageandmaintainingsystemstability.In[9–12].Itisfeasibleforadaptiveprotectionschemetosolvethetraditionalprotectionschemes,thesettingsprincipleofthesepro-problemsthat

8、DGbringstotheprotectionsystem.tectivedevicesisquitesimple.ProtectivesettingsaredeterminedThispapercontinuesasfollows:first,theimpactofDGontra-atmaximalmodesofsystemoperatingconditionsandseverityisditionalprote