西安地铁14号线DRB折返模式下发生列车紧急制动故障的原因及对策
方杰伟
Causes and Countermeasures of Train Emergency Braking Failures under DRB Turn-back Mode on Xi’an Metro Line 14
FANG Jiewei
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作者信息:西安地铁陕西城际铁路有限公司，710018，西安
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Affiliation:Xi’an Metro Shaanxi Intercity Railway Co., Ltd., 710018, Xi’an, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.09.039
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中图分类号/CLCN:U279
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栏目/Col:研究报告
摘要:
［目的］西安地铁14号线在DRB(无司机折返按钮)模式下，列车在折返线内自动换端后发生紧急制动，进而导致列车折返失败。该故障发生频次较高，需要找出故障原因，并制定相应对策。［方法］介绍了DRB模式下的列车折返作业流程，阐述了DRB模式下ATO/ATP控车原理。针对西安地铁14号线DRB模式下发生列车紧急制动故障的实际情况，从信号系统、列车牵引系统、列车制动系统3个方面找寻故障原因，并对提升列车的起动级位、提升牵引阶段冲击率等工况进行了测试。进一步对列车车载信号换端过程进行对比分析，找到了DRB模式下列车紧急制动故障的原因，并制定了应对措施。［结果及结论］DRB模式下，列车激活端换端完成时，车载信号控制尚未完成换端。列车换端过程中信号控制端、列车激活端不一致，是导致该故障的原因。该线运营数据表明，针对此故障原因制定的应对措施，避免了DRB模式下列车紧急制动故障的再次发生。
Abstracts:
［Objective］ Under the DRB (driverless return button) mode on Xi’an Metro Line 14, the train emergency braking will occur after the train automatically switching its head car on the turn-back line, resulting in the train turn-back failure. The failure happens rather frequently, so it is necessary to find out the causes of the failure and develop corresponding countermeasures. ［Method］ The operation process of the train turn-back under DRB mode is introduced, and the ATO/ATP (automatic train operation/automatic train protection) control principle under the DRB mode is expounded. In response to the actual situation of the train emergency braking failure under the DRB mode on Xi’an Metro Line 14, the causes of the failure are sought from three aspects, i.e. signal system, train traction system, and train braking system. Tests are conducted on the working conditions such as lifting the train starting level and improving the impact rate during the traction stage. The process of the train onboard signal head car switching is further analyzed. Causes of the train emergency braking failure under the DRB mode are identified, and corresponding countermeasures are developed. ［Result & Conclusion］ Under the DRB mode, when the train head car switching process completes in the train activation end, it is not completed in the on-board signal control. The inconsistency between the signal control end and the train activation end in the process of the train head car switching is identified as the failure cause. The operational data of the line indicates that the developed countermeasures prevent the reoccuring of the train emergency braking failure under DRB mode.
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