安全仪表系统简介

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1、IntroductiontoE&ISafetyInstrumentedSystems(SIS)电仪安全仪表系统(SIS)介绍2004-04-28UlrichSchuenemann–BYCNanjingBYC南京尤瑞奇•舒曼CTADepartmentE&ImaintenanceEOEG电仪维修EOEGCTA部2004-04-28U.Schuenemann1CommissioningtestofE&ISISControlloops控制回路DCSMonitoringfunctions检测功能DCSInterlocksneededforsmoothoperatio

2、nDCS,(ESD)顺利运行所需的连锁InterlocksrelatedtoplantSafetyESD与装置安全有关的连锁TherearedifferentE&Ifunctions电仪功能各不相同2004-04-28U.Schuenemann2CommissioningtestofE&ISISWhatareE&IS.I.S.什么是电仪S.I.S?E&ISafetyInstrumentedSystems(S.I.S.):电仪安全仪表系统S.I.S.prevent安全仪表系统用于防止：personnelinjury人身伤害或environmentaldamag

3、e环境破坏causedbyanottolerablefaultstateoftheplant由装置的不可接受的故障所造成S.I.S.aredefinedintheSafetyReviewStep2.安全仪表系统是在安全风险评估的第二步中定义的2004-04-28U.Schuenemann3CommissioningtestofE&ISISClassificationofE&Ifunctions电仪功能的分类2004-04-28U.Schuenemann4CommissioningtestofE&ISISDefinitionofSIS:SafetyReview

4、step2SIS的定义:安全审查步骤2SEVERITY严重性S1PotentialforoneormorefatalitiesS2Potentialforoneormoreseriousinjuries(irreversible)S3PotentialforoneormorelosttimeinjuriesS4Potentialforminorinjuries,orirritationE&ISIScanbeusedfor“riskclassBandC”.电仪SIS可用于“B级和C级风险”SeverityProbability严重性概率S1S2S3S4P0(>

5、=1/y)ABDEP1(1/10y)A/BBEEP2(1/100y)BCEFP3(1/1.000y)CDFFP4(<1/10.000y)EFFF2004-04-28U.Schuenemann5CommissioningtestofE&ISISExample:E&ISafetyReview2Checklist实例:电仪安全审查2检查清单2004-04-28U.Schuenemann6CommissioningtestofE&ISISFailuresofaS.I.S.S.I.S的故障Activeerrortriggersoffthesafetyfunctionf

6、ornoreasonplantisswitchedbacktosafeoperationreductionofproductionavailability⁃有源故障-无缘无故触发安全功能-装置切回到安全运行-生产运行可用率降低Passiveerror无源故障inhibitstherequiredsafetyfunctionplantcontinuesoperationalthoughitshouldbeswitchedoffimpactingtheprocesssafetyadverselyaffectingthesafetyfunction对安全功能产生不

7、利影响noadverseeffectonthesafetyfunction对安全功能无不利影响Failure故障Time-averagedprobabilityforapassivefault:PFD“ProbabilityofFailureonDemand”无源故障的时间平均可能性:PFD”指令故障的可能性“2004-04-28U.Schuenemann7CommissioningtestofE&ISISComponentsofaSISSIS的组分Shut-DownSystem停车系统LogicinFailsafePLCorHardwiredsystem在

8、故障安全型可编程控制器或硬接线系统中的逻辑Redun