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页数:90页
时间:2019-07-03
《Thesis - Voltage Sag Ride-Through and Harmonics Mitigation f》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、VoltageSagRide-ThroughandHarmonicsMitigationforAdjustableSpeedDrivesUsingDual-FunctionalHardwarebyAntonS.SalibAthesispresentedtotheUniversityofWaterlooinfulfillmentofthethesisrequirementforthedegreeofMasterofAppliedScienceinElectricalandComputerEngineeringWaterloo,Ontario,Canada,2006©Anto
2、nS.Salib2006AUTHOR'SDECLARATIONIherebydeclarethatIamthesoleauthorofthisthesis.Thisisatruecopyofthethesis,includinganyrequiredfinalrevisions,asacceptedbymyexaminers.Iunderstandthatmythesismaybemadeelectronicallyavailabletothepublic.iiAbstractGreatportionoftoday’sindustryareAdjustableSpeedD
3、rives(ASD’s)operatedinordertofulfillcertainprocesses.Whentheseprocessesarecriticalonesorsensitivetovoltagedisturbances,thatmighttakeplaceduetoinsertinghighloadinanareaneartothePointofCommonCoupling(PCC)oftheprocessorduetoashorttermoutage,fewtensofthousandsuptomillionsofdollarswillbeloston
4、cesuchinterruptions(voltagesags)takeplaceasaresultoftheprocessfailure.Ontheotherhand,adistortedvoltagewaveformatthePCCforsomesensitiveprocessmightmalfunctionasaresultofthehighharmoniccontentofthevoltagewaveform.Utilitiesarerequiredtodeliveraspureaspossiblesinusoidalvoltagewaveformaccordin
5、gtocertainlimits;thus,theymightapplyfinesagainsttheconsumerswhoareresponsibleforproducinghighamountsofcurrentharmonicsthataffectthevoltagewaveshapeatthePCCinordertoforcethemtoimprovetheconsumer’sloadprofilebyaddingfiltersatPCCforinstance.Utilitiesarechargingtheconsumerswhoaredrawingpowera
6、tpoorpowerfactoraswell.ThisthesispresentsanASDretrofittedwithadual-functionalpieceofhardwareconnectedinseriestoitsDC-linkthatiscapableofhandlingthepreviouslytwomentionedproblems.Inotherwords,hardwarethatiscapableofprovidingvoltagesagride-throughduringthevoltagesagconditionsononeside,onthe
7、otherside,duringthenormaloperatingconditions,itiscapabletomitigatetheharmoniccontentsofthedrawncurrentbytheASD’srectifierandtoimprovethepowerfactor.Surveyonvoltagesagride-throughforASD’sapproachesarepresentedintheliteraturehasbeenmade.Approachesareclassifiedasthetop
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