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ŁukaszNyczkowski,RyszardPorada
executiveunitisapowerelectronicvoltagesourcecontrolledbyKalmanfilter.The
presentedresearchresultsweresimulatedinMatlab®/Simulink®environment.
2.GENERALUNITCONTROLSTRUCTURE
Compensationtasksinpowerelectricgridwhichcanberealizedusingseries
compensationunitofgeneralstructureshowninFig.1.
Thestructureisbasedonpowerelectronicinverterthatworksascontrolled
voltagesource.Thatinvertersuppliestheadditivevoltage,withadjustable
transient,tothepowerlinebyseriestransformer.Thatkindofunitcanprovide
controlandadjustmentsofpowerlineparameterssimultaneously[5].
Fig.1.Generalstructureofactiveseriescompensationsystem
Thedevelopmentofactivecompensationsystemsplacesbeforethemmoreand
morehigherrequirementsregardingtheirstaticparameters,andespecially
dynamic.Atpresentoneinvestigatessuchsystemswhichpracticallywithoutdelay
reacttochangesininstantaneousavaluesofcompensatedvoltages[1,4].
Thestructurecanbeclosed(withfeedbackloop)oropen,dependsontypeof
control.Resultsincludedinthispaperarebasedonresearchesunderclosed
structurebasedunit(Fig.2).
Thesourceofadditivevoltage
uc
(t
)
ispowerelectronicinverterwithPWM
generator.Theuseofadaptivedigitalfilterstocontrolofthesesystemsrelies
(amongotherthings)ontheirworkinsuchstructure,sothattheybecomeatthe
sametimeasignalsourceforthegeneratorPWM.Isthisclassicaluseofadaptive
digitalfilters[4],illustratedinFig.3.
