超（特）高压输电线路差动保护的研究的开题报告AbstractWiththerapiddevelopmentofthepowerindustry,ultra-highvoltage(UHV)powertransmissiontechnologyhasbecomeanimportantmeanstomeetthegrowingdemandforelectricity.However,UHVtransmissionlinesareexposedtomanypotentialshort-circuitfaults,whichcancauseseriousdamagetopowergridsandequipment.ToensurethesafeandstableoperationofUHVtransmissionsystems,itisnecessarytodevelopreliableandeffectivedifferentialprotectionschemesforUHVtransmissionlines.ThisresearchproposalfocusesonthestudyofdifferentialprotectionforUHVtransmissionlines.Theobjectivesofthisresearchare:1.ToinvestigatethecharacteristicsofUHVtransmissionlinesandtheirpotentialfaults.2.ToreviewtheexistingdifferentialprotectionschemesforUHVtransmissionlines.3.ToproposeanewdifferentialprotectionschemethatcaneffectivelydetectandisolatevarioustypesoffaultsonUHVtransmissionlines.4.Toverifytheproposedprotectionschemethroughsimulationandexperiment.Theproposedprotectionschemewilluseadvancedsignalprocessingtechniquesandadaptivealgorithmstoachievehighsensitivityandselectivity.Theschemewillalsoincorporatefaultlocationalgorithmstoquicklyidentifythelocationofthefault,whichcanhelpreduceoutagetimeandimprovesystemreliability.TheresearchwillbeconductedbyreviewingexistingliteratureandresearchondifferentialprotectionforUHVtransmissionlines,modelingandsimulationofUHVtransmissionsystems,designingandimplementingtheproposeddifferentialprotectionscheme,andconductingexperimentsandperformanceevaluationsonascaled-downUHVtransmissionsystem.Keywords:ultra-highvoltage,differentialprotection,faultdetection,signalprocessing,adaptivealgorithms,faultlocation.IntroductionUHVpowertransmissiontechnologyhasbeenwidelyadoptedinmanycountriesasameanstomeettheincreasingdemandforelectricity.Comparedwithconventionalhigh-voltagetransmissionsystems,UHVtransmissionlineshavehighertransmissionvoltageandcapacity,whichcansignificantlyreducetransmissionlosses,enhancepowersystemsecurity,andpromotecleanenergydevelopment.However,UHVtransmissionli