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1、POWERQUALITYANALYSISUSINGRELAYRECORDEDDATAAThesisSubmittedtotheCollegeofGraduateStudiesandResearchinPartialFulfillmentoftheRequirementsfortheDegreeofMasterofScienceintheDepartmentofElectricalEngineeringUniversityofSaskatchewanSaskatchewanbyHarjitSinghBirdicCopyri
2、ghtHarjitSinghBirdi,August2006.Allrightsreserved.PERMISSIONTOUSEInpresentingthisthesisinpartialfulfillmentoftherequirementsforaPostgraduatedegreefromtheUniversityofSaskatchewan,IagreethattheLibrariesofthisUniversitymaymakeitfreelyavailableforinspection.Ifurtherag
3、reethatpermissionforcopyingofthisthesisinanymanner,inwholeorinpart,forscholarlypurposesmaybegrantedbytheprofessororprofessorswhosupervisedmythesisworkor,intheirabsence,bytheHeadoftheDepartmentortheDeanoftheCollegeinwhichmythesisworkwasdone.Itisunderstoodthatanyc
4、opyingorpublicationoruseofthisthesisorpartsthereofforfinancialgainshallnotbeallowedwithoutmywrittenpermission.ItisalsounderstoodthatduerecognitionshallbegiventomeandtotheUniversityofSaskatchewaninanyscholarlyusewhichmaybemadeofanymaterialinmythesis.Requestsforper
5、missiontocopyortomakeotheruseofmaterialinthisthesisinwholeorpartshouldbeaddressedto:HeadoftheDepartmentofElectricalEngineeringUniversityofSaskatchewanSaskatoon,Saskatchewan,S7N5A9CanadaiABSTRACTDemandforelectricalpowerisincreasingeveryday.Alongwiththeincreaseinp
6、owerdemand,thecharacteristicsoftheloadsarealsochanging.Frombeinghighpowercon-suming,simple,robustloads,todayloadsaremoreefficient,butatthesametimemoresensitive.Theperformanceandlifeofthesehighlysensitiveloadsdependalotonthequalityofpowersuppliedtothem.Powerquality
7、isanydeviationofthevoltageorcurrentwaveformfromitsnormalsinusoidalwaveshape.Thesedisturbancesinclude,butarenotlimitedto,sag,undervolt-age,interruption,swell,overvoltage,transients,harmonics,voltageflickerandanyotherdistortionstothesinusoidalwaveform.Occurrenceofo
8、neormoreofsuchdisturbancesiscalledapowerqualityevent.Automaticclassificationofthesedisturbancesisimpor-tantforquickdeterminationofthecausesandtocharacterizepossibleimp
