城市轨道交通线路失表道岔处列车安全防护包络研究
左辉
Train Safety Protection Envelope at the Switch without Indication for Urban Rail Transit Line
ZUO Hui
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作者信息:卡斯柯信号有限公司， 610083， 成都
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Affiliation:CASCO Signal Ltd., 610083, Chengdu, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2022.11.020
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中图分类号/CLCN:U231.7
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栏目/Col:研究报告
摘要:
道岔失去表示(以下简称“失表”)是城市轨道交通中常见的故障场景。当列车通过物理上位置确定而状态表示为失表的道岔时，ZC（区域控制器）必须制定有效的列车安全防护措施。提出了道岔失表处列车安全防护的新方案：使用列车安全防护包络（以下简称“包络”）对列车进行安全防护，任何时刻列车都不可冲出包络的范围；防止其他列车的移动授权进入包络覆盖的区域，以避免发生列车相撞；当列车可能通过失表道岔时，在列车所有可能到达的路径上创建包络，并根据计轴/轨道电路区段的被占用状态推导列车可能的位置并扩展包络；为了降低包络对线路运行效率的影响，在列车通过失表道岔后，将列车不可能进入区域内的包络予以缩短或删除。
Abstracts:
The loss of switch indication (hereinafter referred to as ＇switch without indication＇) is a common failures cenario in urban rail transit system. The ZC(zone controller) must formulate effective train safety protection measures when a train passes through the physically determined swith but the actual state shows no indication. A new scheme of train safety protection at the switch without indication is put forward, which defines the train protection envelope to ensure that the train at any time could not break out of the envelope, and prevents any other trains′ movement authorization to enter the scope covered by the envelope in order to avoid train collisions. When a train is passing through a switch without indication, the protection envelope should be created on all possible paths of the train, and the possible positions of the train should be deduced according to the occupied status of axle counter/track circuit sections, the envelope should be expanded at the same time. To reduce the impact of the envelope on line operation efficiency, when a train passes through a switch without indication, envelops within the area where the train cannot enter should be shortened or deleted.
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