城市轨道交通综合监控系统时间同步方案研究

Research on Time Synchronization Scheme for Integrated Supervision and Control System in Urban Rail Transit

介绍了城市轨道交通综合监控系统时间同步的必要性,分析了网络时间协议(NTP)原理,然后以郑州地铁5号线工程综合监控系统时间同步方案为例,分析了常用对时方案存在的不足之处,最后针对这些不足提出了共享电力监控(PSCADA)时钟源的优化方案,对比结果表明优化方案稳定性更好对时精度更高,具有一定的应用价值。

This paper first introduces the necessity of time synchronization in the integrated supervision and control system(ISCS) of urban rail transit,analyzes the principle of network time protocol(NTP),and then taking the time synchronization scheme of ISCS of Zhengzhou Metro Line 5 project as an example,the shortcomings of common time synchronization schemes are analyzed.Finally,aiming at these shortcomings,an optimization scheme of shared clock source of power supervisory control and data acquision(PSCADA) is proposed in this paper.The comparison results show that the optimized time synchronization scheme has better stability and higher time accuracy,which has a certain application value.