達拉特發(fā)電廠高壓變頻器差動保護的研究與應用.pdf

1、華北電力大學（保定）碩士學位論文達拉特發(fā)電廠高壓變頻器差動保護的研究與應用姓名：李天偉申請學位級別：碩士專業(yè)：電氣工程；電力系統(tǒng)及其自動化指導教師：張建成201206華北電力大學碩士學位論文摘要AbstractWiththesustainedandstableeconomicdevelopmentlevelofChinasenergyconsumptionisfurtherimprovedDeepening，stronglyadvoca

2、tedtheestablishmentofaconservation。orientedsocietyinthepolicyenvironment，theapplicationofhigh—techenergysaving，lowerpowerconsumptionrateandthecostofpowergeneration，tobecomethetoppriorityofthevariouspowerplantsinelectrici

3、tyreformHigh—voltageinverteristhemostobviouseffectinmanyenergy—savingmethod，andthereforechangethemotorinthepowergenerationcompaniestorun，theuseofthefrequencyconverterforspeedcontroloperationmodeincomparableadvantagesTher

4、elevantstatisticsshowthatChina’Spowerindustry，industrialpumps，fansduringthefrequencyconvenerpowerconsumptionratecanbereducedupto25％to65％HoweveLtheexistingdomesticinvertermanufacturersofthemotorafterthemotortransformation

5、oftherelayconfigurationiSinadequateattention，especiallythelackofconsiderationofthereliableoperationofthemotordifferentialprotectionTherefore，tostudythehigh—voltageelectricmotorduringthetransformationofmotordifferentialpr

6、otectionofhighvoltageinverterreliabilitystabilityhasbecomethemostimportantconsiderationbythemotorrequiredforsafeoperationThispaperanalyzestheauxiliarypowerplantinInnerMongoliaDalateimportantauxiliarystatusandcharacterist

7、icsoffrequencytransformation，basedonhigh。voltagemotordriveisrunningtheelectricalfailureoccurredduringtheanalysisofthefrequencyconverterisequippedwithelectricalprotectionofthedeficienciesofthecomprehensiveanalysisandprovi