城市轨道交通车辆无电网自走行技术的应用与探讨

Application and Discussion of Urban Rail Transit Vehicle Netless Self-running Technology

通过车载动力电池系统实现车辆无电网供电情况下的自走行,将迫停在故障区间的列车自行牵引至就近车站,能有效提高列车在供电故障时的应急处置效率,此外,车辆无电网自走行还可以提高库内车辆检修效率和人员操作安全性。结合城市轨道交通无电网自走行技术应用现状与需求,以实际新造地铁线路为例,提出了一种基于车载动力电池系统的城轨交通车辆无电网自走行供电系统解决方案。针对城轨交通车辆无电网自走行对动力电池应用需求,从动力电池的安全性、功率特性、循环寿命、环境适应性以及经济性等方面,对比分析了不同类型动力电池的适用性,指出在当前锂离子电池技术发展阶段,钛酸锂电池是城市轨道交通车辆无电网自走行应用场景的最佳选择。

The on-board power battery system enables the self-running of vehicle without power supply network,and automatically pulls the train that is forced to stop in fault area to the nearest station,which can effectively improve the emergency response efficiency of the vehicle in case of power supply failure.In addition,vehicle netless self-running can also improve the efficiency of vehicle maintenance and the safety of personnel operation.Combined with the application requirements and current situation of netless self-running technology in urban rail transit,taking actual newly built metro line as an example,a solution of netless self-running power supply system for urban rail transit vehicle based on onboard power battery system is proposed.Targeting the power battery demand required for urban rail vehicle netless selfrunning function,the adaptability of different types of power battery are comparatively analyzed from perspectives such as safety of the power battery,power characteristics,cycle lifespan,environmental adaptability and economy.It is pointed out that in the current lithium ion battery technology development stage,lithium titanate battery is the best choice for urban rail transit vehicle netless self-running application scenario.