城市轨道交通CBTC系统运行能力优化研究

Study on Optimization of Operation Capacity of Urban Rail Transit CBTC System

随着城市轨道交通的不断建设、客运量的增多,城市的运输压力也在逐渐增大。信号系统在注重效率的同时,更应该考虑安全运行。通过对信号系统的保护区段和接近区段长度进行简要的分析,研究了当前保护区段和接近区段的计算原理和设计原则。保护区段长度需要满足前车的后溜防护距离及后车紧急制动距离;接近区段长度需要满足不利条件下的紧急制动距离及信号反应延时时间。经分析,在确保安全的前提下,保护区段和接近区段长度具备优化的空间,可以通过调整车辆参数、线路参数等适当的缩短区段长度。通过研究发现,优化保护区段可以提升列车的通过能力,缩短列车的追踪间隔;优化接近区段长度可以提高列车的运行效率。因此,优化后的效果对当前的运营是十分重要的,对今后运行效率的提高起着至关重要的作用。

With the continuous construction of urban rail transit and the increase of passenger traffic,the transportation pressure in the city is gradually increasing.While focusing on efficiency,the signal system should consider safe operation.By briefly analyzing the length of protected zone section and approaching zone section of signal system,the calculation principle and design principle of current protected zone section and approaching zone section are studied.The length of the protected section needs to meet the backward skidding protection distance of the front car and the emergency braking distance of the rear car;the length of the approaching section needs to meet the emergency braking distance and signal reaction delay time under the unfavorable conditions.After analysis,under the premise of ensuring safety,the length of the protected section and the approaching section has the space for optimization,and the length of the section can be appropriately shortened by adjusting vehicle parameters and line parameters.It is found that optimizing the protected section can improve the train passing capacity and shorten the tracking interval of trains;optimizing the approach section length can improve the operation efficiency of trains.Therefore,the effect of optimization is very important for the current operation and has a vital role for the future operation efficiency improvement.