基于时延防护的编组列车安全包络管理方法

Safety Envelope Management Method for Marshaled Trains Based on Time Delay Protection

[目的]灵活编组列车中的主控车、被控车与ZC(区域控制器)通信延时存在异步性,不同列车的安全包络可能出现重叠、错位、不连续等情况。为了提高ZC对灵活编组列车安全包络管理的精度,需研究不同列车的消息延时差异,在时延防护的前提下对编组列车的安全包络进行动态管理。[方法]对编组列车的位置关系进行场景分析;介绍了典型编组列车安全包络处理方案;提出改进编组列车安全包络处理方案,并对两种方案进行了对比分析。[结果及结论]ZC与VOBC(车载控制器)通过交互延时计算参数计算消息延时,ZC通过比较主控车和被控车的延时状态,动态计算编组列车安全包络。由于ZC不单独依靠主控车扩展包络,当主控车位置无法确定时,可使用当前被控车位置进行计算处理,避免了采用历史信息导致位置报告无法及时更新的情况,解决了主控车通信质量较差时安全包络精度低的问题,提升了ZC控制列车的管理精度。

[Objective]In flexible marshaled trains,the communication delay between the master railcar,subordinate railcar and ZC(zone controller)exhibits asynchrony,leading to potential issues such as overlapping,misalignment,and discontinuity in the safety envelopes of different trains.To enhance the accuracy of ZC in managing the safety envelopes of flexible marshaled trains,it is essential to study the message delay differences among different trains.It is aimed to dynamically manage the safety envelopes of marshaled trains under the premise of delay protection.[Method]A scenario analysis of the positional relationships among marshaled trains is conducted.A typical safety envelope handling solution for marshaled trains is introduced and the improved one is proposed,a comparative analysis between the two solutions is conducted.[Result&Conclusion]ZC and VOBC(vehicle on-board controller)calculate message delays with interactive delay calculation parameters.By comparing the delay status between the master and subordinate railcars,ZC dynamically calculates the safety envelope for marshaled trains.Unlike relying solely on the master railcar for extending the envelope,ZC can use the current position of the subordinate railcar for calculation when the master railcar position is uncertain,avoiding situations where adopting historical information causes delays in updating position reports promptly.The issue of low safety envelope accuracy when master railcar communication quality is poor,thereby enhancing the management precision of ZC controlled trains.