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ID:6823298
大小:1000.50 KB
页数:22页
时间:2018-01-27
《power system monitoring and control facilities on protective relays》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、编号:毕业设计(论文)外文翻译(原文)院(系):机电工程学院专业:电气工程及其自动化学生姓名:陆开荣学号:指导教师单位:电气工程姓名:李彩林职称:副教授2012年5月27日1PowerSystemMonitoringandControlFacilitiesonProtectiveRelaysAbstract:Itisnowpossibletoconsiderintegratingthefunctionsofthepowersystemprotectionsystemswiththoseofthelocalandremotedatacollectionandcontrolsys
2、tems.Astructuredapproachtothisintegrationisnecessary.However,ifthefullbenefitsaretoberealized.Asolutionwhichwillsolvemanyoftheproblemspreviouslyassociatedwiththisintegrationispresentedtogetherwithanexampleofhowitmightinfuturebeappliedinatypicalsubstation.Keywords:Digitalcommunications.Integ
3、ration1.IntroductionThecurrentpracticeinpowersystemtransmissionanddistributionenvironmentsistoseparatethefunctionsofthelocalcontrol,protectionandsupervisorycontrolanddataacquisition(SCADA)systems.Onereasonforthishasbeenthetechnicalconstraintthathaslimitedtheamountofintegrationwhichcanbereli
4、ablyachieved.Localcontrolfacilitieshaveconsistedofhardwiredpanelstakingupmuchcontrolroomspace.Controllogichasbeenprovidedbyhardwiredcontactsorprogrammablelogiccontrollers.Untilrecentlymuchoftheprotectionequipmenthasconsistedofanaloguedevices,againtakingupmuchspace.Mostmodernprotectiondevice
5、susingelectronicandmicroprocessortechnologieshavesofarconcentratedonreducingthespacetakentoimplementtraditionalprotectionfunctions.Generally,SCADAsystemshavebeenaddedmorerecentlyandhavesuppliedtheirowntransducers,interfaceunitsandwiring.Thesehavegrownupinparallelwiththelocalcontrolandprotec
6、tionsystemsdespitethefactthatthisoftenresultedinmuchfunctionalduplication.WhereinformationconcerningtheprotectionoperationhasbeenrequiredbytheSCADAsystemthishasbeenderivedinasecondaryfashion,forexample,feedingtheprotectionoutputsbackintoSCADAdigitalinputunits.Recenttechnologyadvanceshaveled
7、totherealizationthatthisdegreeofduplicationisbecominglessandlessnecessary.GiveninfinitecomputingpoweritcouldbearguedthattheinformationnecessarytoperformprotectionfunctionsisallavailableorcanbemadeavailableontheSCADAnetwork.ItisconceivablethenThattheSCADA
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