資源描述：
《Transient Behavior Analysis of Doubly-fed Induction Generator under Unbalanced Voltage Dips and Testing Validation.pdf》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、2010InternationalConferenceonPowerSystemTechnology1TransientBehaviorAnalysisofDoubly-fedInductionGeneratorunderUnbalancedVoltageDipsandTestingValidationWenchangShao,RuimingWang,QingLi,ShiyaoQinDFIGisitsvulnerabilitytogriddisturbancesespeciallytoAbstract--No
2、rmally,it’smoredifficulttorealizeLowVoltageunbalancevoltagedips.ThestatorwindingsareconnectedRidethrough(LVRT)forDoubly-fedinductiongenerator(DFIG)directlytothegridwithonlyarotor-sideAC-DC-ACunderunbalancedvoltagedipsthaninbalancedvoltagedips.partially-rate
3、dconverter.GridvoltagedipcausesoverUnbalanceddipsaremoreharmfultotheDoubly-fedinductionvoltagesandovercurrentsintherotorwindingsthatcangenerator(DFIG)thanbalanceddips,becausetheyinducehigherdamagetheconverterifnoprotectionelementsareinstalled.voltagesinther
4、otor.Besides,theinfluenceofunbalancedgridSoinordertoprotectthevulnerableconverteraswellasothervoltagedipstoDFIGisstudiedtogetherwiththetransientcomponents,windturbinesoftendisconnectedfromthegrid.behaviorofDFIG.Atheoreticalanalysisisgiventothereasonsoftheov
5、ercurrentoccurringduringanunbalancedgridvoltageHowever,asthepenetrationofwindpowercontinuestodipsinthispaper.FieldtestingresultswithmobileLVRTtestingincrease,morecountriesarerevisingtheirgridcodeswhichcontainerarealsopresentedtosupporttheanalysis.demandwind
6、turbinesremainconnectedtothegridintheeventofvoltagedips,andsupplyreactivepowerduringtheIndexTerms--DFIG,LVRT,UnbalancedVoltageDips.voltagedip.Inordertofulfillthenewrequirements,windturbinesarerequiredtohaveLowVoltageRidethroughI.NOMENCLATURE(LVRT)capability
7、.InChina,StateGridCorporationhasrecentlyissuedastandardforsuchcapabilityinTechnicalu,u—Statorandrotorvoltagespacevector.srRuleforconnectingwindfarmintopowergrid[1].Thus,itisveryessentialtounderstandtheresponsei,i—Statorandrotorcurrentspacevector.srbehavioro
8、fDFIGundergridvoltagedips,andlaterontoψ,ψ—Statorandrotorfluxspacevector.verifytheDFIGstructuralanditscontrol.srNormally,it’smoredifficulttorealizeLVRTunderRs,Rr—Statorandrotorresistance.unbalancedvolta
