The Constant Voltage Transformer (CVT) for Mitigating Effect

《The Constant Voltage Transformer (CVT) for Mitigating Effect》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、ESL-IE-00-04-27THECONSTANTVOLTAGETRANSFORMER(CVlJFORMITIGATINGEFFECTSOFVOLTAGESAGSONINDUSTRIALEQUIPMENTRalphJ.Ferraro,P.E.RandyOsborneRobertStephensPresidentProjectManagerSeniorElectricalEngineerPowerQualitySolutions,Inc.NorthTexasElectric,Inc.PennzoilProductsCo.Kno

2、xville,TN37922Borger,TX79007Shreveport,LA71109ABSTRACT"internally"hardenedequipmentthatcanprotectloadsfromthewidevarietyofpowerqualityvariationsthatElectricpowerqualityproblemsassociatedwithmaycauseproductivityproblems.Itwillbeshownthatainteractionsbetweendistributi

3、onandindustrialprocessCVT(seeFigureI)canmaintainarelativelyconstantcontrolsystemscanbeprevented.Surveysoflargeusersoutputvoltagedespitebriefvariationsininputvoltage.Ifthatbuypoweratthetransmissionanddistributionproperlysized,aCVTcanregulateitsoutputvoltagevoltagestu

4、muprelativelyfewcomplaintsabouttheduringavoltagesagtosixtypercentofnominalvoltagequalityoftheirincomingpower,whilesurveysofsmallforvirtuallyanyduration,asshowninFigure2.However,usersconnectedatsecondaryvoltagestumupnumeroustheyarenoteffectiveduringmomentaryvoltageco

5、mplaintsaboutthequalityoftheirincomingpower.interruptionsorextremelydeepvoltagesags(generallyThreemajorchangesinthecharacteristicsofcustomerbelowfiftypercentofnominal).CVTsareoftenfavoredloadsandpowerdistributionsystemshavealteredtheoverothersag-mitigationdevicesbec

6、ausetheyarenatureofthepowerqualityequation:(I)greaterrelativelymaintenance-free,withnobatteriestoreplaceorsensitivityofdevicesandequipmenttoelectricpowermovingpartstomaintain[3].Thefollowingparagraphsvariations,(2)theinterconnectionofsensitiveloadsinwilldescnbewhatt

7、olookfortodetermineifaCVTextensivenetworksandautomatedprocesses,and(3)anapplicationmakessense;howtosizetheCVT;adetailedincreaseinloadsthatusepowerelectronicsinsometypecasestudyofarefineryapplicationthatpointsoutwhatofpowerconversionconfiguration[1][2].Thispaperbenef

8、itswerederived;andhowreliabletheexistingCVTpresentsapplicationsoftheconstant-voltagetransformerretrofitapplicationshavebeen.(CVT)formitiga