FAO核心子系统安全完整性等级评价方法研究  

Evaluation Method for Core Subsystem Safety Integrity Level of the FAO System

作　　者：仲伟强 刘超 黄抗强 刘启洋 胡妃俨 龚韬懿 ZHONG Weiqiang;LIU Chao;HUANG Kangqiang;LIU Qiyang;HU Feiyan;GONG Taoyi(Traffic Control Technology Co.,Ltd.,Beijing 100070;China Railway Test&Certification Center Limited,Beijing 100081;Shenzhen Line 12 Rail Transit Co.,Ltd.,Shenzhen,Guangdong 518000;Shenzhen TrafficControl Technology Limited,Shenzhen,Guangdong 518000)

机构地区：[1]交控科技股份有限公司,北京100070 [2]中铁检验认证中心有限公司,北京100081 [3]深圳市十二号线轨道交通有限公司,广东深圳518000 [4]深圳交控科技有限公司,广东深圳518000

出　　处：《都市快轨交通》2023年第4期70-74,共5页Urban Rapid Rail Transit

摘　　要：为探究如何更加实际地评价全自动运行(FAO)系统核心子系统功能的安全完整性等级(SIL),通过研究欧洲电工标准化委员会(CENELEC)标准中风险模型的构造,给出风险降低因素(RRF)的定义;通过定义的风险降低因素,建立可容忍事故率(TAR)与可容忍危害率(THR)的换算关系,进而评估出FAO系统核心子系统功能次级危害的可容忍危害率;最后通过其与安全完整性等级的对应关系,得到核心子系统功能的安全完整性等级。应用结果表明:结合实际的FAO工程项目应用成果,给出风险降低因素中各要素的具体示例,可供借鉴;与直接采用可容忍事故率保守估计安全完整性等级的方法相比,在考虑风险降低因素后评估得到的安全完整性等级更接近实际情况。This study sought to investigate practical methods for evaluating the safety integrity level(SIL)of the core subsystem within the fully automatic operation(FAO)system.After studying the structure of the risk model in the European Committee for Electrotechnical Standardization(CENELEC)standard,a definition of the risk reduction factor(RRF)was provided.By applying the defined RRF,we established a conversion relationship between the tolerable accident rate(TAR)and the tolerable hazard rate(THR).Consequently,we evaluated the THR for secondary hazards of the FAO system’s core subsystem functions.The SIL of the core subsystem functions was then ascertained via the corresponding relationship between THR and SIL.Results from the FAO engineering project application demonstrated that the SIL estimate,when considering the RRF,was more realistic compared to the conservative method of directly using TAR for SIL estimation.Specific examples of each element within the RRF were provided,drawing from actual project results,for future reference.

关 键 词：全自动运行(FAO) 风险降低因素(RRF) 可容忍危害率(THR) 可容忍事故率(TAR) 安全完整性等级(SIL) 

分 类 号：U231[交通运输工程—道路与铁道工程]