基于同步旋转坐标的统一电能质量控制器

基于同步旋转坐标的统一电能质量控制器Abstract:Power quality disturbances have become a major problem in power systems d

基于同步旋转坐标的统一电能质量控制器 Abstract: Powerqualitydisturbanceshavebecomeamajorproblemin powersystemsduetotheincreasingnumberofrenewableenergy sourcesandnon-linearloads.Toenhancethequalityofpower, severaltechniqueshavebeenproposed,andoneofthemisthe unifiedpowerqualityconditioner(UPQC).TheUPQCiscapableof mitigatingallthepowerqualitydisturbancesintheelectrical distributionsystem.Thisresearchpaperfocusesonthedesignand implementationofasynchronousrotatingframe-basedUPQCto ensurethehigh-qualitypowersupplyandimprovetheoverall powerqualityattheloadside. Introduction: Thepowerqualitydisturbancesintheelectricaldistribution systemcanbecategorizedintothreetypes,namelyvoltage disturbances,currentdisturbances,andfrequencydisturbances. Thesedisturbancesmayleadtoanunstablepowersystem, economiclosses,equipmentfailures,andultimately,unsatisfied customers.Severaldevicesandtechniqueshavebeenproposed andimplementedtomitigatethepowerqualityproblems.The UPQCisonesuchdevicewhichiscapableofmitigatingvoltage andcurrentdisturbancessimultaneously. TheUPQCiscomposedoftwoshuntlegsandoneseriesleg. Theshuntlegsareresponsibleformitigatingvoltagedisturbances, whiletheserieslegisresponsibleformitigatingcurrent disturbances.TheUPQCisgenerallyimplementedusingthe instantaneousreactivepowertheoryorthesynchronousrotating frametheory. Theinstantaneousreactivepowertheoryiswidelyusedin UPQCimplementation.However,thesynchronousrotatingframe controlstrategyisgainingpopularityasithasseveraladvantages overtheinstantaneousreactivepowertheory.Thesynchronous rotatingframecontrolstrategyisbasedonthetransformationof thethree-phasevoltageandcurrentsignalstothesynchronous rotatingframe.Inthisframe,thecontrolalgorithmsaremore straightforwardandofferbettercontroloverthepowerquality disturbancescomparedtothetraditionaltheory.