通过分析长大下坡道闭塞分区长度对CTCS-3级和后备CTCS-2级列控系统的影响,指出二者对闭塞分区长度的需求完全相反,并针对CTCS-3级列控系统的行车许可回缩、速度突降等问题的产生原因进行分析.阐述坡度、闭塞分区长度与不同列控模式下列车运行速度、追踪间隔时间等要素之间的关系,制定闭塞分区设置的基本原则.检算典型坡度下闭塞分区长度设置的合理区间范围及相应追踪间隔时间,指出坡度超过-30‰后将无法兼顾不同列控等级下的运行速度.设计模拟退火算法,根据闭塞分区设置原则及闭塞分区取值规律,给出压缩求解空间、提高求解效率的方法.以郑万高速铁路长大下坡地段为例,对闭塞分区设置进行优化,在不考虑其他约束的前提下,与设计院优化方案相比,本求解优化方案在确保CTCS-3级控车模式下允许速度可达350 km/h的同时,将CTCS-2级控车模式下的允许速度提高30 km/h,追踪间隔时间压缩23 s.
Study on Method of Setting Block Sections for Speed 350 km/h High-speed Railway in Long Downhill Sections
The influence of the length of block sections in long downhill sections on CTCS-3 and backup CTCS-2 train control systems was analyzed,concluding that the requirements of the two train control systems for the length of block section were completely opposite.The causes of movement authority retraction and speed drop of CTCS-3 level train control system were analyzed.Based on the analysis of the relationship between the slope,the length of the blocking section,speed and tracking interval in different train control modes,the basic principles of the block sec-tion setting were determined.The reasonable interval of the length of the block section under the typical slope and the corresponding tracking interval were calculated.When the slope exceeds-30‰,the operating speed under dif-ferent train control levels cannot be overall planned.The simulated annealing algorithm of nested simulation was de-signed,and the method of compressing the solution space and improving the solution efficiency was given according to the principle of blocking section setting and the block section value law.Based on the case study of the downhill section of the Zhengzhou—Wanzhou high-speed railway,the block section setting was optimized.Without consider-ing other constraints,compared with the on-site scheme,the proposed optimized scheme ensures 350 km/h under CTCS-3 control mode,while increasing the allowable speed under CTCS-2 control mode by 30 km/h,and reducing the headway by 23 s.
high-speed railwaylong downhill gradeCTCS-3 level train control systemblock sectionmovement authority
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