文档介绍：时钟同步技术及其在地铁综控系统中的应用
李芳,杨德华,罗存
(国电南京自动化股份有限公司,江苏南京 210031)
摘要:时钟同步对于地铁综控系统的故障分析、监视控制和运行管理都具有重要意义。本文首先分析了地铁综控系统分层和分布式的特点,然后介绍了当前世界上主要的GPS和NTP协议对时方式,最后针对地铁综控系统的网络拓扑结构和特点提出了采用基于NTP协议和GPS相结合的时钟同步方案,并通过在搭建的环境中运行测试,证明这种混合对时方案基本可以满足地铁综合监控系统对时钟同步的要求,具有一定的应用价值,并指出了进一步改进的方向。
关键词: 地铁综控系统;网络拓扑;时钟同步;NTP;GPS
Time synchronization and its application in Metro Integrated Control System
Li Fang,Yang De-hua,Luo Cun
(GUODIAN NANJING AUTOMATION CO.,LTD,Najing 210031,China)
Abstract:Time synchronization is very important for the fault analysis, supervision and control , and the operation management of Metro Integrated Control System. This paper first analyzes the characteristics of the Metrointegrated control system, which is a hierarchical and distributed system, and then introduces the current world's major GPS and NTP protocol. According to work topology and the characteristics of the Metrointegrated control system, gaving a clock synchronization scheme which use the NTP protocol based on GPS. In the test environment,this hybrid synchronization scheme can meet the subway integrated monitoring system on clock synchronization requirements,and has certain application value,and last points out the direction of further improvement.
Key words:Metro Integrated Control work topology;clock synchronization;NTP;GPS
中图分类号:TP29 文献标志码:A 文章编号:
0 引言
在社会经济和城市化的快速发展过程中,地铁在城市建设和发展中体现出越来越重要的地位和作用。随着计算机技术