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1、4154IEEETRANSACTIONSONINDUSTRIALELECTRONICS,VOL.56,NO.10,OCTOBER2009ReactivePowerControlDesigninDoublyFedInductionGeneratorsforWindTurbinesBalduinoCezarRabelo,Jr.,Member,IEEE,WilfriedHofmann,Member,IEEE,JoãoLucasdaSilva,RodrigoGaibadeOliveira,andSelênioRochaSilvaAbstractThehighpenetrationlev
2、elofwindpowergenerationandtheriseingeneratingunitratedpower,arecloselyin-inaninterconnectedelectricalnetworkcarriesnewtechnicalchal-terrelatedandbringaboutnewchallengestoengineers.Thelengesregardingsystemstability.Despitethestochasticnatureofconsiderableamountofwindenergygeneratedanddelivere
3、dtothewind,gridreliabilityhastobeguaranteed.Incompliancewiththeinterconnectedelectricalnetworkdependsinstantaneouslypowercompaniesnewrequirementsonwindturbinesasregardscontributiontovoltageregulation,thispaperproposesareactiveonthesitesweatherconditions.Althoughexperiencetellsuspowercontroll
4、erdesignfordoublyfedinductiongeneratordrives.thatwidespreadwindgenerationresultsinmorestableaverageThisdrivetopologyenablesthecontrolofreactivepowerindepen-generatedpowers[2],dependenceontheactualwindconditionsdentlyoftheactivepowerflowusingbothrotorandmains-sideisstillariskfactorinmaintainin
5、ganevenbalancebetweeninverters.Thisdegreeoffreedomisusedinordertosharetheenergyofferanddemandasabasicconditiontothereliablereactivepowerscirculatinginthedrivesystemandresultingfromthereactivepowerrequiredinthenetwork.Thecontrollersareoperationoftheelectricalpowersystem.designedusingwell-know
6、nlinearcontroltechniquesinordertoInvestigationsontheblackoutintheU.S.andCanadainpresentthesamedynamics.Furthermore,theproperreactiveAugust2003pointedoutthatthecascadedoutagesofseveralpowersharecanbeusedtoenhancethedriveefficiency.Exper-transmissionlinesandgeneratingunitscouldhavebeenavoidedim
7、entalresultsshowtheperformanceoftheproposedreactiveifcontrollablereactivepowerwasavailable.Therefore,somepowercontrol.recommendationsonthisissuewerepresentedin[3],wheretheIndexTermsACmotordrives,controlstrategies,distributedgeneratingunitsshoulddis
