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ID:36832496
大小:3.16 MB
页数:70页
时间:2019-05-16
《基于模糊策略的变压器状态检修》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘要摘要电力变压器作为电力系统的枢纽设备,其运行可靠性直接关系到电力系统的安全与稳定。状态检修是一种较定期检修方式更能降低维修成本、缩短检修停电事件、提高设备利用率的检修方式。为了实施变压器的状态检修,需要对变压器的状态进行准确的评估。因此,及时准确地掌握变压器的运行状态对于指导变压器状态检修以及提高电力系统的运行可靠性都具有重要的现实意义。本文对试验数据的处理采用了模糊数学和数理统计的方法,选择三角形和梯形的相结合确定试验数据的隶属函数。由模糊评估得出严重的状态量(接近注意值的状态量)在变压器评估报告的模糊状态量描述项中表现出
2、来。针对油中溶解气体的处理,本文采用模糊--LL值法实现变压器故障诊断的功能。最后依据《输变电设备状态检修导则》,构建相应的评估模型,对变压器状态进行评估。结合工程实际,阐述变电设备状态检修辅助决策系统的设计方案。对系统进行了需求分析,并采用VC抖编程软件与SQLServer数据库相结合技术完成对系统的设计。系统结合各种离线数据判断电力变压器的健康情况,依据评估结果制定了相应检修策略和检修周期。在实际应用中取得良好的效果。关键字:电力变压器;状态检修;状态评估;模糊数学;故障诊断ABSTRACTTopowertransforme
3、r,asthehubdeviceofpowersystem,operationreliabilityisdirectlyrelatedtopowersystemsecurityandstability.Condition-basedmaintenanceisasortofmaintenancebetterthantheregularmaintenancetOreducemaintenancecosts,reducemaintenanceoutageevents,andimproveequipmentutilization.Ino
4、rdertoimplementthetransformercondition-basedmaintenance,transformerneedforaccurateassessmentofthestate.Therefore,thetimelyandaccurategraspofthetransformerrunningstateinguidingthetransformercondition—basedmaintenanceandtoimprovethereliabilityofpowersystemoperationhave
5、importantpracticalsignificance.Fuzzymathematicsandmathematicalstatisticalareusedtoprocesstheexperimentaldatas,andchoosethecombinationoftriangularandtrapezoidaltodeterminethemembershipfunctionofthetestdata.Derivedfromthefuzzyassessment,theseriousstatusofthefuzzystated
6、escriptioncanbeshownintheassessmentreport.Astothegasesdissolvedinoil,thispaperpresentsafuzzythree—ratiomethodtoachievethetransformerfaultdiagnosisfunctions.Atlastthecorrespondingassessmentmodelsareconstructedbasedon“Guidelinesforpowertransmissionandtransformationequi
7、pment’Scondition-basedmaintenance”,andthetransformerconditionassessmentaregiven.Combinedwithengineeringpractice,thedesignofequipmentsubstationcondition-basedmaintenancedecisionsupportsystemispresented.Todoaneedanalysisofthesystem,usingVC++programmingsoftware,combined
8、withtheSQLServerdatabasetechnology,tocompletethesystemdesign.Systemcombinesavarietyofofflinedatatodeterminethehealthofpowertransfor
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