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1、5660IEEETRANSACTIONSONINDUSTRIALELECTRONICS,VOL.60,NO.12,DECEMBER2013AnAdaptiveVoltageControlStrategyofThree-PhaseInverterforStand-AloneDistributedGenerationSystemsTonDucDo,StudentMember,IEEE,VietQuocLeu,StudentMember,IEEE,Young-SikChoi,HanHoChoi,Member,IEEE,andJin-WooJung,Mem
2、ber,IEEEAbstractThispaperproposesanadaptivecontrolmethodofforitslocalloads[6].Controlofstand-aloneDGSsorUPSshasthree-phaseinvertersforstand-alonedistributedgenerationsys-beenanattractiveresearchareainrecentyears.Intheseappli-tems(DGSs).Theproposedvoltagecontrollerincludestwoco
3、ntrolcations,theregulationperformanceofinverteroutputvoltageterms:anadaptivecompensatingtermandastabilizingterm.isevaluatedintermsoftransientresponsetime,steady-stateTheadaptivecompensatingcontroltermisconstructedtoavoiddirectlycalculatingthetimederivativesofstatevariables.Mea
4、n-error,andtotalharmonicdistortion(THD).Furthermore,thewhile,thestabilizingcontroltermisdesignedtoasymptoticallyqualityofinverteroutputvoltageisheavilyaffectedbythetypesstabilizetheerrordynamicsofthesystem.Also,afourth-orderofloadssuchassuddenloadchange,unbalancedload,andoptim
5、alloadcurrentobserverisproposedtoreducethenumbernonlinearload.In[7],aconventionalproportionalintegral(PI)ofcurrentsensorsandenhancethesystemreliabilityandcostef-controllerhasbeeninvestigated.However,theoutputvoltagefectiveness.Thestabilityoftheproposedvoltagecontrollerandthepr
6、oposedloadcurrentobserverisfullyprovenbyusingLyapunovhasaconsiderableamountofthesteady-stateerror,anditstheory.TheproposedcontrolsystemcanestablishgoodvoltageTHDisnotsatisfactoryinthecaseofnonlinearload.Theregulationsuchasfastdynamicresponse,smallsteady-stateerror,H∞loop-shapi
7、ngcontrolschemewhichispresentedin[8]andlowtotalharmonicdistortionundersuddenloadchange,alsocannoteffectivelymitigatetheTHDoftheoutputvoltageunbalancedload,andnonlinearload.Finally,thevalidityoftheundernonlinearload.Therefore,theload-sideinvertersrequireproposedcontrolstrategyi
8、sverifiedthroughsimulationsandexperimentsonaprototypeDGStestbe
