750kV系統(tǒng)線路繼電保護(hù)應(yīng)用研究.pdf

1、西安科技大學(xué)碩士學(xué)位論文750kV系統(tǒng)線路繼電保護(hù)應(yīng)用研究姓名：湯景鴻申請學(xué)位級別：碩士專業(yè)：電力系統(tǒng)及其自動化指導(dǎo)教師：傅周興@Subject：TheResearchoftheProtectionItsApplicationin750kVPowerSystemSpecialty：PowersystemautomationName：TangJinghong（Signature）Instruct：FuZhouxing（Signature）

2、ABSTRACTWiththedevelopmentofpowertechnologycontinuingtoinvestigatetoelectricfencerelayprotectionelectricfencerelayprotectionhasbecomematurated.Asthefirstlineofdefenceofelectricfencerelayprotectionoperatingsafelyrelayprot

3、ectionplayanimptantpartallthetime.Sothispaperlaystresson750kVsystemcircuitafterrealizingtheimptanceofrelayprotection.Thispapertakes750kVsubstationinGuanTingLanZhouasobjectofstudy.Accdingtothesystemrelatedparamentsprovide

4、dbyNthwestPowerGridCompanytheresultsfromthedynamicprovidedbypowerResearchInstitutethispaperanalyzestheelectriccurrentvariesbesidesthecircuitthetransientstateprocesscausedbydistributedcapacitancewhencircuitisshted.italsoa

5、nalyzesthehigherderofoscillation.OnthisbasisthispaperalsoanalyzesvalueofDCdecaycopponentwhenshtcircuitoccurthedifferenceACdecaycopponentbesidesthecircuit.Atlastthispaperintroducestheacteristicsofstaticexciteroverexciters

6、tudysthemeasuresofstaticexciteroverexciter.Throughtheanalysisofthecapacitancecurrent、transientprocessofinterimresistance、feeder、heavyload、unloadgelargeshtcircuitcurrentinthecircuitprotectionof750kVUHVtransmissionlines.So