电分相对CBTC系统追踪间隔时间影响研究

Study on the Influence of Phase Separation on Tracking Interval Time of CBTC System

CBTC系统通常应用于直流供电的城市轨道交通系统中,对于采用CBTC列控系统、交流供电制式的城际铁路、市域铁路,亟需对接触网电分相区域对追踪间隔时间的影响进行定性、定量研究;分别对区间和车站附近分析了追踪间隔时间计算方法,构建追踪间隔时间计算模型,分析影响追踪间隔的主要因素为追踪距离和追踪速度;在此基础上,为防止CBTC系统移动授权位置落入分相区导致掉分相事故,提出分相防护区的设置方法并分析移动授权在分相防护区的转换原理;详细分析分相防护区引入后对系统追踪间隔时间的影响原理,并对追踪间隔时间计算模型进行修正,建立电分相区域追踪间隔时间计算模型;分析系统降级为点式ATP或人工驾驶后备模式时,列车能够顺利通过分相区并提出对电分相设置的相关建议;以深惠城际大鹏支线城际铁路为例,采用电分相区域追踪间隔时间计算模型,结合牵引计算软件对分相区域的区间追踪间隔时间和车站间隔时间进行计算,结果表明,设置分相防护区后,该区域系统追踪间隔时间均小于2min,能够实现列车追踪间隔时间小于2.5min的既定目标,满足系统设计能力要求。

The CBTC system is usually used in the urban rail transit system with DC power supply.For the intercity railway and urban railway using the CBTC train control system and the AC power supply system,it is urgent to conduct qualitative and quantitative research on the impact of the catenary power phase separation area on the tracking interval time.analyzes the calculation method of tracking interval time for the interval and the vicinity of the station,builds the calculation model of tracking interval time,and analyzes the main factors affecting the tracking interval are the tracking distance and tracking speed;on this basis,in order to prevent the CBTC system from moving The authorized position falls into the phase-separated area,which leads to the accident of phase-drop.The setting method of the phase-separated protection area is proposed and the conversion principle of the mobile authorization in the phase-separated protection area is analyzed.The tracking interval time of the system after the introduction of the phase-separated protection area is analyzed in detail.The influence principle of the tracking interval time was revised,and the tracking interval time calculation model of the electrical phase-separated area was established.Some suggestions on the setting of electrical phase separation are put forward.Taking the Shenzhen-Huizhou Intercity Dapeng Branch Intercity Railway as an example,the tracking interval time calculation model of the electrical phase separation area combined with the traction calculation software is used to track the interval tracking interval time and station interval of the phase separation area.The time is calculated,and the results show that after setting the Split-phase protection zone,the system tracking interval in this area is all less than 2 minutes,which can achieve the established goal of the train tracking interval being less than 2.5 minutes and meet the system design capability requirements.