基于CTCS2+ATO信号系统的市域铁路区间自动折返方案

Automatic Turn-back Scheme for City Railway Intervals Based on CTCS2+ATO Signaling System

[目的]采用CTCS2+ATO(第二级中国列车自动运行控制系统+列车自动运行)信号系统的市域铁路,在公交化运营场景下,当发生故障或临时运营计划调整时,存在列车在区间折返的需求,为提高市域铁路列车区间折返作业安全和效率,提出了一种列车区间自动折返方案。[方法]采用优化既有CTCS2+ATO信号系统局部电路配线、接口通信协议、软件控制逻辑的方法,独立控制区间折返区域轨道电路发码方向,利用计算机联锁、列控中心、调度集中各系统之间既有接口通信协议的预留字段增加折返进路标识,优化区间轨道电路编码逻辑、应答器布置及报文发送逻辑,增加正常进路/折返进路、区间方向、列车不同区域多场景组合轨道电路发码防护控制逻辑,实现市域铁路信号系统区间自动折返。并从普遍适应性、运营效率、运营安全等方面分析了方案的可行性。[结果及结论]该优化方案在上海市域铁路机场线工程项目的首次应用结果,以及采用部分真实现场数据对该优化方案进行仿真的结果,均表明该区间自动折返方案满足一般市域铁路3 min运营追踪间隔要求。

[Objective]When there is a malfunction or temporary operation schedule adjustment under public transit operational scenarios,the train turn-back in intervals is required for city railways using the CTCS2+ATO(Chinese train control system level 2+automatic train operation)signaling system.To enhance the safety and efficiency of the interval turn-back operations in city railways,an automatic train turnback scheme is proposed.[Method]By optimizing the existing local circuit wiring,interface communication protocols,and software control logic in CTCS2+ATO signaling system,and controlling the track circuit coding direction in the interval turn-back area independently,the proposed scheme can achieve signaling system automatic turn-back operations in city railway intervals through utilizing reserved fields in the existing interface communication protocols between the computer interlocking system,train control center,and centralized dispatching system to add turn-back route identifiers,refining the track circuit coding logic,balise placement and message transmission logic to increase normal/turn-back routes,interval directions,and multi-scenario combinations of track circuit coding protection logic.The feasibility of the proposed scheme is analyzed in terms of adaptability,operational efficiency,and safety.[Result&Conclusion]The first application results of this optimized scheme in Shanghai City Railway Airport Line project,along with simulation results of the scheme based on partial site data,demonstrate that the interval automatic turn-back scheme meets the operational requirement of a typical 3-mintue tracking interval for city railways.