本文以继电保护设备状态检修研究为课题,围绕状态检修的概念!适用范围 及技术支持等内容展开应用研究工作 随着电力系统的日益复杂,电网结构的不断发展,分布范围变广,维护的成 本和工作量越来越大,长期以来我国电力系统设备检修遵循/到期必修!修必修 好0的周期性检修原则势必不能适应现代电网设备检修的要求另外,随着二次 设备数量逐渐增多,继电保护在系统中的作用也日益重要,继续沿用以往周期性 检修的负面效应也都体现出来,比如设备的频繁检修缩短了设备寿命,检修管理 人员的工作量不断加大,线路的经常停役降低了经济效益等此外,随着微机保 护的全面使用,装置的自检水平随之不断提高因此,对设备进行维护仍然采用 常规的定期检验制度是不合时宜的,必须根据保护设备的实际运行状态进行状态 检修 报告首先对我国继电检修的现状,从检修种类!内容和周期三个方面进行了 论述,指出现存的检修模式存在着检修效率不高!资源过度浪费等问题,进而提 出了状态检修的概念,对其在电力系统中的适用范围和实施原则做了详细的介 绍报告以沈阳供电公司为例,列出沈阳地区继电保护设备的分布及运行情况, 从而引出对状态检修的必要性和可行性问题的探讨接着报告对状态检修的在线 监测和故障诊断技术!管理保障和软件开发等问题一一进行了论述,并着重对检 修模式由定期检修到状态检修过程中,可能遇到的问题和解决方法做了进一步的 分析随着可靠性分析!寿命评价和设备状态监测等技术的发展,现有的检修体 制会逐步被状态检修所取代,本文也在结束语中对这一趋势和状态检修的未来发 展做了展望 关键词:继电保护;状态检修;在线监测;故障诊断华北电力大学硕士学位报告 AbstraCt Thisthesisfoeusesontheeondition一basedmaintenaneeofProteetiveRelay deviees,andtheeoncePtofeondition一basedmaintenanee,aPPlieationsandteelmieal suPPortsaredeseribed. WiththedeveloPmentofPowerSystem,thestategridstruetUre15beeoming moreeomPlieatedanddistributedoveralargerarea.Atthesametime,theamountof workandeostarequieklyinereasing.Foralongtime,wehavealwaysfollowedthe PeriodiemaintenaneePrinciPleinthePowerSystem0Perfeetmaintenancein time,whiehnoweannotmeetthePrineiPlesofmaintenaneerequirementofmodem PowerequiPments.What,5more,withthegrowingamountofseeondary equiPments,RelayProteetivebeeomemoreimPortantinPowerSystem,whiehhas causedthenegativeeffeetofthePeriodiemaintenaneeemerging.Forinstanee,the inereasingworkingloadofmaintenaneemanage,redueingeeonomiebenefitseaused bytheeut一offPowerline.Furthermore,withtheself-eheeklevelofdeviees,the widely一aPPliedofMieroeomPuterProteetiveRelays15broughttoanewhigh. Thus,theeotnmonPraetieeofregUlardeteetivesystem15undesirable.Aeeordingtothe PraetiealworkingeonditionofProteetivedeviees,itmustadoPteondition一based maintenanee. Firstly,thisPaPerintrodueesabouttherelaymaintenaneeofthestatus,fromthe maintenaneetyPes,eontentandPeriodieityofthreeasPeetsarediseussed,Pointingout thatthestatusmaintenaneemodeeffieieney15nothighmainienanee,exeessivewaste ofresoureesandotherissues,andPutsforwardtheconeePtofeondition一based maintenanee,andgiveadetailedintroduetionaboutcondition一basedmaintenaneetoits seoPeofaPPlieationofthePrineiPlesandimPlementationinthePowersystem.This thesissetsShenyangsuPPlyeomPanyforexamPle,liststherelayinShenyang distributionandoPerationofequiPment,whiehleadstothemaintenaneeofthestatus oftheneeessityandfeasibilityoftheProblem.Thenthestateofmaintenaneeofthe on一linemonitoringandfaultdiagnosisteehnology,managementissuessuchas securityandsoftwaredeveloPmentarediseussedinthethesisonebyone,andfoeuson themaintenaneemodefromregularmaintenaneetoeondition一basedmaintenanee Proeess,andfurtheranalysisaboutwhatPossibleProblemswillmeetandsolutions. WiththedeveloPmentofidentifieationtechnologyandfailuredeteetion,reliabilityand lifeassessmentteelmiques,theexistentmaintenaneemodewillsoonberePlaeedby eondition一basedmaintenance.Finally,Thisartielehasalsoea币edontheforeeastto thistendeney. Keywords:ProteetiveRelays;eondition一Basedmaintenanee;on一linemonitor:fault diagnosis华北电力大学硕士学位报告 目录 摘要..................................................................................................................I Abstract....................................................................................................................11 第一章绪论.........................................................................................................,.1 1.1我国继电保护检修现状...............................................................................1 1.1.1继电保护检验种类.............................................................................,.2 1.1.2继电保护检验内容与检验周期...........................................................2 1.2现有检修模式存在的弊端..........................................................................3 1.3状态检修的基本概念..................................................................................4 1.4继电保护状态检修的适用范围及实施原则..............................................5 1.4.1继电保护状态检修的适用范围...........................................................5 1.4.2继电保护状态检修的实施原则...........................................................8 1.5本报告的主要工作......................................................................................9 第二章沈阳地区继电保护设备现状..............................,............................10 2.1沈阳地区继电保护概况............................................................................10 2.1.1沈阳地区继电保护设备概况.............................................................10 2.1.2沈阳地区继电保护维护人员概况.....................................................n 2.2沈阳地区继电保护设备运行可靠性统计................................................12 2.2.1沈阳地区继电保护设备运行年限统计............................................12 2.2.2沈阳地区继电保护设备运行状态分析............................................12 2.3结论........,..............................................................................................16 第三章继电保护状态检修可行性和必要性分析.............,.........................18 3.1继电保护状态检修的可行性分析............................................................18 3.2继电保护状态检修的必要性分析............................................................20 3.3继电保护状态检修的开展前提...............................................................23 3.4结论............................................................................................................25 第四章继电保护状态检修实施的技术及管理保障.........,.........................26 4.1继电保护状态检修实施的技术保障........................................................26 4.1.1继电保护在线监测技术.....................................................................26 4.1.2继电保护故障诊断技术....................................................................28 4.1.3继电保护状态检修评估体系............................................................29 4.2继电保护状态检修实施的管理保障........................................................31 4.3研发继电保护状态检修管理软件的必要性............................................31 4.4结论............................................................................................................33华北电力大学硕士学位报告 第五章检修模式过渡过程中可能存在的问题及解决方法.............................34 第六章结束语.........................................................................,.....,.........36