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1、POWERQUALITYANALYSISUSINGRELAYRECORDEDDATAAThesisSubmittedtotheCollegeofGraduateStudiesandResearchinPartialFul?llmentoftheRequirementsfortheDegreeofMasterofScienceintheDepartmentofElectricalEngineeringUniversityofSaskatchewanSaskatchewanbyHarjitSinghBirdicCopyri

2、ghtHarjitSinghBirdi,August2006.Allrightsreserved.PERMISSIONTOUSEInpresentingthisthesisinpartialful?llmentoftherequirementsforaPostgraduatedegreefromtheUniversityofSaskatchewan,IagreethattheLibrariesofthisUniversitymaymakeitfreelyavailableforinspection.Ifurtherag

3、reethatpermissionforcopyingofthisthesisinanymanner,inwholeorinpart,forscholarlypurposesmaybegrantedbytheprofessororprofessorswhosupervisedmythesisworkor,intheirabsence,bytheHeadoftheDepartmentortheDeanoftheCollegeinwhichmythesisworkwasdone.Itisunderstoodthatanyc

4、opyingorpublicationoruseofthisthesisorpartsthereoffor?nancialgainshallnotbeallowedwithoutmywrittenpermission.ItisalsounderstoodthatduerecognitionshallbegiventomeandtotheUniversityofSaskatchewaninanyscholarlyusewhichmaybemadeofanymaterialinmythesis.Requestsforper

5、missiontocopyortomakeotheruseofmaterialinthisthesisinwholeorpartshouldbeaddressedto:HeadoftheDepartmentofElectricalEngineeringUniversityofSaskatchewanSaskatoon,Saskatchewan,S7N5A9CanadaiABSTRACTDemandforelectricalpowerisincreasingeveryday.Alongwiththeincreaseinp

6、owerdemand,thecharacteristicsoftheloadsarealsochanging.Frombeinghighpowercon-suming,simple,robustloads,todayloadsaremoree?cient,butatthesametimemoresensitive.Theperformanceandlifeofthesehighlysensitiveloadsdependalotonthequalityofpowersuppliedtothem.Powerquality

7、isanydeviationofthevoltageorcurrentwaveformfromitsnormalsinusoidalwaveshape.Thesedisturbancesinclude,butarenotlimitedto,sag,undervolt-age,interruption,swell,overvoltage,transients,harmonics,voltage?ickerandanyotherdistortionstothesinusoidalwaveform.Occurrenceofo

8、neormoreofsuchdisturbancesiscalledapowerqualityevent.Automaticclassi?cationofthesedisturbancesisimpor-tantforquickdeterminationofthecausesandtocharacterizepossibleimp