高速铁路供电系统安全性评估研究

研究目的:供电系统是高速铁路系统的重要组成部分,其安全可靠运行与铁路系统安全性密切相关。安全性评估是现代安全管理的重要一环。而我国在高铁供电系统安全性评估方面还只在定性阶段,缺乏定量评估指标和相应分析方法。本文在探讨系统安全性评估的方法、步骤的基础上将EN50126标准与铁路供电系统安全性评估相结合,分析提出了能反映系统各类风险发生概率和风险等级的定量安全性评估指标和安全性评估方法,为提高高铁供电系统的安全性管理水平提供参考。研究结论:基于事件树分析法(ETA)和改进的概率风险评估方法(LEC)相结合的安全性评估方法,对铁路供电段典型算例进行安全性定量评估分析,分别得到了各类供电设备的危险度指标和由其引发的系统安全风险等级,以及应采取的风险控制对策。说明本文提出的安全性量化指标和评估方法的有效性。

Research on Safety Assessment of High Speed Railway Power Supply System

Research purposes:Railway Power Supply System(RPSS) is an important part of high-speed railway.Whether the power system is safe and reliable or not is related closely to security and stability of railway operation.Safety assessment is a vital element in modern management.But so far safety assessment of the high-speed railway power system is only in qualitative analysis stage with no quantitative indices and correlative methods.Integrates the safety assessment of RPSS with the standard EN50126,some proper safety assessment quantitative indices and corresponding methods of RPSS are proposed by the paper.It is availed reference for enhancing safety management of the RPSS. Research conclusions:By means of the novel safety assessment method based on ETA and improved LEC,The safty quantitative analysis for typical RPSS example is presented,criticality indices of power supply facility and so the risk grade of system are got respected.The validity of the safety assessment method and quantitative indices put by the paper is convinced.