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1、IEEETRANSACTIONSONPOWERDELIVERY,VOL.15,NO.4,OCTOBER20001311STATCOMControlforPowerSystemVoltageControlApplicationsPraneshRao,StudentMember,IEEE,M.L.Crow,SeniorMember,IEEE,andZhipingYang,StudentMember,IEEEAbstract—AStaticCompensator(StatCom)isadevicethatcanprovide
2、reactivesupporttoabus.Itconsistsofvoltagesourcedcon-vertersconnectedtoanenergystoragedeviceononesideandtothepowersystemontheother.Inthispaper,theconventionalmethodofPIcontroliscomparedandcontrastedwithvariousfeedbackcontrolstrategies.Alinearoptimalcontrolbasedon
3、LQRcontrolisshowntobesuperiorintermsofresponseprofileandcontroleffortrequired.ThesemethodologiesareappliedtoanexamplepowerFig.1.ConnectionofaStatComtoabus.system.IndexTerms—Controllerdesign,StatCom,voltageregulation.I.INTRODUCTIONHEUSEOFFACTS(flexibleACtransmiss
4、ionsystem)Tdevicesinapowersystemcanpotentiallyovercomelimitationsofthepresentmechanicallycontrolledtransmissionsystems.Byfacilitatingbulkpowertransfers,theseintercon-nectednetworkshelpminimizetheneedtoenlargepowerplantsandenableneighboringutilitiesandregionstoex
5、changepower.ThestatureofFACTSdeviceswithinthebulkpowersystemwillcontinuallyincreaseastheindustrymovestowardamorecompetitivepostureinwhichpowerisboughtandsoldFig.2.EquivalentcircuitofStatCom.asacommodity.Aspowerwheelingbecomesincreasinglyprevalent,powerelectronic
6、deviceswillbeutilizedmorefre-voltage.TheinvertersareconnectedtoacapacitorwhichquentlytoinsuresystemreliabilityandstabilityandtoincreasecarriestheDCvoltage.maximumpowertransmissionalongvarioustransmissionInpractice,conventionalproportional-integral(PI)controlisco
7、rridors.typicallyusedtoachieveautomaticvoltageregulation.Thestan-Thestaticsynchronouscompensator,orStatCom,isashuntdardresponsetimeistypicallychosentobeontheorderofaconnectedFACTSdevice.Itgeneratesabalancedsetofthree-hundredmicroseconds(s)[2].Inthispaper,several
8、statephasesinusoidalvoltagesatthefundamentalfrequency,withfeedbackcontrolmethodsaredevelopedandshowntohavesu-rapidlycontrollableamplitudeandphaseangle.Thistypeofperio
