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城市轨道交通牵引供电系统跟踪识别指标研究

2021-04-05李晓聃

现代信息科技 2021年17期

摘  要:城市轨道交通牵引供电系统具有线长点多、无备用设备、工作环境狭窄、安装质量良莠不齐等特点,故障致灾类型复杂、成因众多,且不宜排查、风险性大,对其关键零部件进行跟踪监测是安全运营的迫切需求之一。文章对轨道交通牵引供电系统事故进行调研统计,推演致灾条件、致因路线、致灾后果及社会影响,形成牵引供电系统失效故障树;建立关键零部件贝叶斯网络模型并进行故障诊断,由此提出跟踪识别指标,为轨道交通牵引供电系统的状态监测提供理论指导。

关键词:轨道交通;牵引供电系统;致灾机理;贝叶斯网络

中图分类号:TP391  文献标识码:A 文章编号:2096-4706(2021)17-0141-04

Abstract: Urban rail transit traction power supply system has the characteristics of long line with many points, no standby equipment, narrow working environment and uneven installation quality. The types of fault disasters are complex, there are many causes, and it is not suitable for troubleshooting and has high risk. Tracking and monitoring its key parts is one of the urgent needs of safe operation. In this paper, the accident of traction power supply system of rail transit is investigated and counted, the disast-causing conditions, the route of cause, the disaster-causing consequences and the social influence are deduced, and the traction power supply system failure tree is formed. The Bayesian network model of key parts is established and fault diagnosis is carried out, and tracking identification indexes are proposed to provide theoretical guidance for state monitoring of traction power supply system of rail transit.

Keywords: rail transit; traction power supply system; disaster-causing mechanism; Bayesian network

0  引  言

城市軌道交通牵引供电系统具有沿线布置、线长点多、无备用设备、工作环境狭窄、安装质量良莠不齐等特点,并且故障致因类型复杂、不易排查,并且由于处理过程中存在众多不确定因素,容易引发突发性、扩延性的连锁事故。确定可能成为风险源的关键设备的动态指标,是预测风险演化趋势,制定完备的灾后应急预案和有效的灾前风险预防方案的必要指导,也是成为城市轨道交通安全运营和智能管理的迫切需求。

1  牵引供电系统事故致因及故障树分析

1.1  事故调研统计

本文通过多渠道搜集了国内城市轨道交通从2009年到2020年的31起牵引供电系统相关事故,对牵引供电系统事故进行统计。

1.1.1  致因类型数据

据此不完全统计,国内城市轨道交通牵引供电系统故障致灾的因素如图1所示,致灾因素可分为环境因素、人员因素和设备因素,其中设备因素导致的事故共20起,占比达64.5%,根据故障源又可将其细分为设备本身质量、设备安装问题和设备使用状态。……

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