电力光纤通信网的可靠性研究

研究院硕士学位论文摘要摘要近年来,随着科学技术的不断发展,电力系统与通信系统已经密不可分,电力系统的监测和控制越来越依赖于通信系统可靠运行的支撑通信系统的可靠性直接关系到电力系统生产运行的安全稳定目前,电力系统已经建立了日益庞大的SDH光纤传输网,用来传送语音!数据!多媒体等业务光通信系统密集的传输容缝,严重扩大了单个部件的失效对整体网络的影响一旦重要部件出现故障,将造成电网的巨大损失因此,对电力光纤通信网可靠性的研究具有重要意义目前,虽然对通信网可靠性的研究已取得不少成果,但系统化地分析电力通信网可靠性的方法还比较少见本文首先对现有的通信网可靠性研究方法进行分析比较在此基础L,根据电力通信网的特点,提出适合电力通信网应用的可靠性分析方法并设计了改进的基于最小路集的可靠性算法该算法对传统的节点遍历法加以改进,算法基于网络拓扑图一步求出同时包含节点和链路的最小路集随后,使用具有快速生成技术的BDD算法对求得的最小路集进行不交化分解,得到最小路集的不交和形式,直接将每项概率相加,计算网络源宿点间的可靠度本文总结了电力典型光纤网络模型,给出基于设备实际运行记录计算设备可靠性指标的方法并对具体电力通信网进行计算得到了网络两点间业务可用度分析了网络拓扑结构对可用度的影响考虑到电力通信网服务于电网的特点,本文将电网/N一10分析方法应用到电力通信网可靠性分析中,计算了节点和链路的/N一10可用度得到了网络的重要节点和链路基于此,分析了各类节点和链路状态变化对网络可用度的影响为通信网络的优化和整改提供了依据本文提出考虑业务性能要求的可用度计算方法并根据实际业务要求,计算了基于业务性能的网络可用度使计算结果更具实际意义根据分析结果,得到了提高网络可用性的方法:提高传输介质可靠性!提高设备[ty]有可靠性!优化网络拓扑结构!改善设备运行环境等关键词:可靠性电力通信网可用度最小路集不交化学研究院硕士学位论文AbstraetStudyonReliabilityofPowerOPtiealFiberCommunicationsNetworkAbstraetInreeentyears,withthecontinuousdeveloPmentofseience&technology,Powersystemhasbeencloselylinkedtoeom-munieationssystem,andthemonitoringandcontrolinPowersystem15inereasinglydePendenionthereliablerunningofcommunieationssystem.Thus,thereliabilityofeommunieationssystem15direetlyrelatedtothesafeandstableoPerationofPowersystem.50far,ahugeSDHoptiealtransmissionnetworkhasbeenestablishedinPowersystem50astotransmitvoiee,dataandmultimediaserviees,ete.Howeve几thehightransmissioneaPaeityofoPtiealeommunieationsystemeangreatlyenlargetheimPaetoffailuresinasingleeomPonentontheentiresystem,huge1055tothePowersystemwouldbeeausedoneefailuresoeeurinthekeyeomPonents.Therefore,it,5ofgreatsignifieaneetostudythereliabilityofoPtieal一fiberPowereommunieationsnetwork.Inthisthesis,theeurrentmethodstostudyreliabilityofeommunieationsnetworkareanalyzed,andtheRBDdiagram15usedtoealeulatethereliabilityofsimPleandeomPlexnetW0rkstrUctures.Onthisbasis,aminimal一Path一set一basedalgorithln(T-MPalgorithln)thatcanbeusedtocaleulatethereliabilityofPowereo力11nunieationsnetW0rk15Putforward.ByimProvingthetraditionalnodetraversingmethod,thisalgorithllleanworkouttheminimumPathseteontainingbothnodesandlinkswiththehelPofnetworktoPology.Subsequenily,theBDDalgorithmwithraPidgenerationtechnology15usedtomaketheaequiredminimumPathsetsnon一disjoini,therebyacquiringthenon一disjointminimumPathsets.Then,thereliabilityofsoUree一destinationnodePairsinthenetwork15ealeulatedbysununingtheProbabilityofeaehitemdireetly.Inthisstudy,thetyPiealoPtieal一fibereommunieationsnetworkforPowersystem15inirodueed,andamethodtomeasurethereliabilityofequiPmentaeeordingtoitsactualoPerationreeords15given.Subsequently,themethod15usedtocaleulatetheservieeavailabilitybetweensoureeanddestinationnodesinanaetualnetwork.Also,usingthismethod,theimpactofnetworktopologyonavailability15analyzed,the/N一10availability15ealeulated,andthein1Paetofchangesinkeynodes/linksandnon一eritiealnodes/linksonthenetworkreliability15analyzed.Thisthesisgivesamethodforavailabilityealeulation,inwhiehtheservieePerformance15takenintoaeeount.Aithesametime,inaeeordaneewiththeaetualrequirementsofserviees,thenetworkavailabilitybasedonservicePerformance15ealeulated,thusenhaneingthePraetiealsignifieaneeoftheresults.Aeeordingtotheresults,methodstoimProvenetworkavailabilityareaequired,namely,toenhaneethereliabilityoftransmissionmediumandtheinherentreliabilityofequiPment,oPtimizethenetworktoPology,andimProvetheworkingenvironmentofequiPments,ete.Keywords:reliability,Powereommunieationsne枷ork,availability,minimumPathset,disjoint研究院硕士学位论文目录目录第一章绪论.........................................................................................................,,11.1课题背景..................................................................................................,,11.2研究现状..................................................................................................,,21.2.1通信网可靠性研究现状..................................................................,,21.2.2电力通信网可靠性研究现状..........................................................,,31.3论文主要工作及结构...............................................................................,,41.3.1研究工作.........................................................................................,,41.3.2结构安排.........................................................................................,,4第二章通信网可靠性概述..................................................................................,,62.1基本概念与研究分类..,,.........................................................................,,62.1.1抗毁性.............................................................................................,,62.1.2生存性.............................................................................................,,62.1.3可用性.............................................................................................,,62.1.4总结.................................................................................................,,72.2可靠性指标..............................................................................................,,82.3小结...................................................................