介绍列车数字无线调度通信系统(Digital Radio communication system for Train Dispatching,DRTD)对既有450 MHz列调通信的兼容方案,包括地面和车载设备方案、多制式通话互通方案、操作台兼容操作方案、数据业务及C T C系统接口适配方...介绍列车数字无线调度通信系统(Digital Radio communication system for Train Dispatching,DRTD)对既有450 MHz列调通信的兼容方案,包括地面和车载设备方案、多制式通话互通方案、操作台兼容操作方案、数据业务及C T C系统接口适配方案等多个层面,以便满足普速铁路450 MHz列调系统数字化改造及其过渡期的运营需求。展开更多
Multi-train modeling and simulation plays a vital role in railway electrification during operation and planning phase. Study of peak power demand and energy consumed by each traction substation needs to be deter- mine...Multi-train modeling and simulation plays a vital role in railway electrification during operation and planning phase. Study of peak power demand and energy consumed by each traction substation needs to be deter- mined to verify that electrical energy flowing in its railway power feeding system is appropriate or not. Gauss-Seidel, conventional Newton-Raphson, and current injection methods are well-known and widely accepted as a tool for electrical power network solver in DC railway power supply study. In this paper, a simplified Newton-Raphson method has been proposed. The proposed method employs a set of current-balance equations at each electrical node instead of the conventional power-balance equation used in the conventional Newton-Raphson method. This concept can remarkably reduce execution time and computing complexity for multi-train simulation. To evaluate its use, Sukhumvit line of Bangkok transit system （BTS） of Thai- land with 21.6-km line length and 22 passenger stopping stations is set as a test system. The multi-train simulation integrated with the proposed power network solver is developed to simulate 1-h operation service of selected 5-min headway. From the obtained results, the proposed method is more efficient with approximately 18 % faster than the conventional Newton-Raphson method and just over 6 % faster than the current injection method.展开更多
为满足铁路网区间运输能力可视化决策的需求,以及铁路枢纽紧张区段日常分析要求,基于地理信息系统(GIS,Geographic Information System)、大数据技术,设计了集铁路运行线、经营、客票、货票、计划、统计等多源运输数据信息为一体的铁路...为满足铁路网区间运输能力可视化决策的需求,以及铁路枢纽紧张区段日常分析要求,基于地理信息系统(GIS,Geographic Information System)、大数据技术,设计了集铁路运行线、经营、客票、货票、计划、统计等多源运输数据信息为一体的铁路网能力利用分析系统。提出了面向高速铁路、普速铁路的实际通过能力计算方法,以及融合客/货运密度、客座利用率的计算方法;构建了标准统一的时空信息关联模型,将多源数据信息与GIS数据进行融合,实现了铁路网运输能力的可视化表达、多维统计、智能检索、一省一图、车站到发量分析等功能。试点应用表明,该系统能够显著提升面向铁路网的分析能力,减少数据维护工作量,对改善铁路运输能力提供信息化支撑。展开更多
文摘介绍列车数字无线调度通信系统(Digital Radio communication system for Train Dispatching,DRTD)对既有450 MHz列调通信的兼容方案,包括地面和车载设备方案、多制式通话互通方案、操作台兼容操作方案、数据业务及C T C系统接口适配方案等多个层面,以便满足普速铁路450 MHz列调系统数字化改造及其过渡期的运营需求。
文摘Multi-train modeling and simulation plays a vital role in railway electrification during operation and planning phase. Study of peak power demand and energy consumed by each traction substation needs to be deter- mined to verify that electrical energy flowing in its railway power feeding system is appropriate or not. Gauss-Seidel, conventional Newton-Raphson, and current injection methods are well-known and widely accepted as a tool for electrical power network solver in DC railway power supply study. In this paper, a simplified Newton-Raphson method has been proposed. The proposed method employs a set of current-balance equations at each electrical node instead of the conventional power-balance equation used in the conventional Newton-Raphson method. This concept can remarkably reduce execution time and computing complexity for multi-train simulation. To evaluate its use, Sukhumvit line of Bangkok transit system （BTS） of Thai- land with 21.6-km line length and 22 passenger stopping stations is set as a test system. The multi-train simulation integrated with the proposed power network solver is developed to simulate 1-h operation service of selected 5-min headway. From the obtained results, the proposed method is more efficient with approximately 18 % faster than the conventional Newton-Raphson method and just over 6 % faster than the current injection method.
文摘为满足铁路网区间运输能力可视化决策的需求,以及铁路枢纽紧张区段日常分析要求,基于地理信息系统(GIS,Geographic Information System)、大数据技术,设计了集铁路运行线、经营、客票、货票、计划、统计等多源运输数据信息为一体的铁路网能力利用分析系统。提出了面向高速铁路、普速铁路的实际通过能力计算方法,以及融合客/货运密度、客座利用率的计算方法;构建了标准统一的时空信息关联模型,将多源数据信息与GIS数据进行融合,实现了铁路网运输能力的可视化表达、多维统计、智能检索、一省一图、车站到发量分析等功能。试点应用表明,该系统能够显著提升面向铁路网的分析能力,减少数据维护工作量,对改善铁路运输能力提供信息化支撑。
