Algorithms for the accounting of multiple switching events in digital simulation of power-electronic systems

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1、IEEETRANSACTIONSONPOWERDELIVERY,VOL.20,NO.2,APRIL20051157AlgorithmsfortheAccountingofMultipleSwitchingEventsinDigitalSimulationofPower-ElectronicSystemsM.O.Faruque,StudentMember,IEEE,VenkataDinavahi,Member,IEEE,andWilsunXu,SeniorMember,IEEEAbstract—Digitalsimulationofpowe

2、rsystemscontainingpowerswitchingeventisnotknownapriori(sinceitiscontrolledbyelectronicsapparatusischallengingduetotheneedtoaccountprocessesexternaltothesimulator)anditseldomcoincidesmultipleswitchingeventswithinonesimulationtime-step.Thisexactlywiththerebycreatingaswitchi

3、ngdelaywhichpaperdescribesafamilyofalgorithms,withvaryinglevelsofproduceserroneoussimulationresults.computationalcomplexity,foraccountingsuchswitchingeventsindigitalsimulations.TheproposedalgorithmsareapplicableVarioustechniquesareavailableinliteraturetodealwithforbothoff

4、-lineandreal-timesimulations.Acomparativestudysingleinter-stepswitchingeventsindigitalsimulationunderontheirperformancesuchasharmoniccontent,errorsinfunda-bothoff-lineandreal-timeconditions.State-spacemethodsmentalcomponentandsimulationtimerequirementispresented.[4],[5]ha

5、vebeeneffectivelyusedtosimulatethyristorbasedAPulseWidthModulated(PWM)VoltageSourceConvertercircuits.Fixedtime-stepmethodsbasedonnodalanalysishave(VSC)basedD-STATCOMsystemisusedasacasestudyforsimulations.Simulationresultsindicateexcellentperformancebeenusedfortraditionalp

6、owersystemtransientsimulation(accuracyandefficiency)incomparisonwithafixedtime-step[6],[7]aswellaspower-electroniccircuitsimulation[8],[9]algorithmusingasmallstep-size.underbothoff-lineandreal-timeconditions.TheadvantageofIndexTerms—Digitalcontrol,discreteeventsimulation,ex

7、trap-suchmethodsisthattheadmittancematrixofthesimulatedolation,interpolation,powerelectronics.networkremainsunchanged.Combinedwithafixedtime-stepnodalmethod,linearinterpolationhasprovedtobeaveryeffectivetechniqueinestimatingthecircuitvariablesattheI.INTRODUCTIONswitchingin

8、stant.SomeofthepioneeringresearchinthisareaEAL-TIMEdigitalsimulationofpowersystemsisbe-hasbeenre