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1、1104IEEETRANSACTIONSONINDUSTRYAPPLICATIONS,VOL.33,NO.4,JULY/AUGUST1997EffectivenessofHarmonicMitigationEquipmentforCommercialOfficeBuildingsJih-ShengLai,SeniorMember,IEEE,andThomasS.Key,SeniorMember,IEEEAbstractÐHarmoniccurrentsgeneratedbymodernofficeAlso,unlikelarg
2、edata-processingsystems,locatedinspeciallyequipmentincreasepowersystemheatlossesandthepowerdesignedandpoweredrooms,theseelectronicappliancestendbillsofendusers.Bylookingattheharmonic-relatedlossesintobedistributedonexistingbranchcircuits.aspecificelectricalsystemÐr
3、epresentingacommercialofficeAddingfiltersforharmonicreductionisacommonwaybuildingÐenergysavingsandharmonicreductionbenefitsofdifferentmitigationmeasuresarequantified.Twosingle-phasetocutharmonic-relatedlossesandprotectthebuildingpowerandthreethree-phaseactiveandpassiv
4、eharmonicfiltersaresystem.However,thefiltertype,installationlocation,load,addedtoatypicalbuildingelectricalsystemandevaluatedandsourcecharacteristicsareallcriticalinachievingthebycomputersimulation.Currentandvoltagedistortionsaredesiredperformance.Usingresultsfrom[1
5、]and[2],thispapercomputed,andtheestimatedcostofthesefiltersarecomparedevaluatesdifferentfiltertypesappliedatseverallocationsinatopredictedlossesinapowersystemwhereharmoniccurrentsarenotcompensated.Resultsshowsomeharmoniccompensatingtypicalofficebuildingpowersystem.Th
6、epapercomparesthefiltersareeffectiveandothersarenot,dependingonthefilterfilter'sestimatedcostandsideeffectswithexpectedsavingstypeandlocationinthebuildingwiringsystem.inreducedwiringlossesandlowerdistortion.IndexTermsÐHarmonicmitigationequipment,harmonics.II.OFFICEBU
7、ILDINGELECTRICALSYSTEMMODELI.INTRODUCTIONFig.1showsatypicalcommercialofficebuildingwiringsystemandthevoltageandcurrentprofilesundermixedARMONICcurrentscomefromelectronicequipmentlinearandnonlinearloads.TransformerloadingisassumedHemployinganinputrectifiersupplyingadc
8、-linkstoragetobe50%,andthethreephasesarewellbalanced.Theorripple-smoothingcapacitor.Thistypeofequipmentincludesmajorharmoniccontributorisswitch-modepowe
