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The diversity of railway gauge is caused by historical reasons, and its shortcomings have been exposed to Modern railway transportation. At present, the solutions to Logistics and transport issues between different gauge railways are mainly to change transport equipment. And different ways to replace Bogie will affect the size of the frontier transshipping station, operating efficiency and investment...
The brake system is the safety-critical subsystem of rail transit vehicle. However, the reliability test technology related to rail transportation equipments is much needed in China. In this paper, a certain Chinese computer-controlled electro-pneumatic brake system was selected to conduct reliability analysis by FMEA and BCEU (Brake Control Execution Unit) was determined the weak link of the brake...
Stability problems are a major issue in railway grids for both, 16.7 Hz and 50 Hz applications. Thus, the impact of the traction vehicle line-side converter control has to be evaluated. One method to obatin informations about the system is to measure the input-impedance of the traction vehicle. In this paper, the input impedance of traction vehicles with two different line-side converter controls...
The optimal operation of a rail vehicle with onboard energy storage device minimizing energy consumption in catenary free mode is discussed in this paper. The Electric Double Layer Capacitor (EDLC) is assumed as an energy storage device because of its high power density, long lifetime and quick charge/discharge. The proposed method can determine the optimal acceleration/deceleration at each sampling...
Stability aspects are a major concern in railway-traction applications. It is well-known that low-frequency oscillations occur in 16.7-Hz railway-grids. They can be initiated either by impedance variation or by multiple traction vehicles active in one feeding section. This paper focuses on the emulation of many traction vehicles starting up in the same feeding section and hereby causing instability...
An overview is given of the technology and the performance of “Train Conformity Check System”. The system provides a modular set of defect detection functions for rail vehicles, including the detection of three-dimensional profile limits violations and of overheated components. Other available defect detection systems can be integrated to identify and arrest trains with hazardous defects, to support...
The ESS is considered to be one of the useful devices for energy storing and recycling. The ESS reduces primary energy consumption without affecting transport capacity and punctuality. This paper presents the basic performance tests and charging/discharging test of the 1500 V ESS. Characteristics with/without the ESS are also presented for comparison. The verification test on field focused on stabilizing...
In the platform of the urban transit system, a certain gap is inevitably made between the subway vehicle and the platform, and the gap gets wider in the curved area of the platform. This gap contributes to decrease passengers' safety. Especially, it endangers children's safety. Nowadays plug-in type doors are installed in the newly designed urban transit system. It is worldwide trend to reduce the...
This paper describes DC railway loadflow algorithm that is essential process to determine the capacity of the energy storage system which is good at energy. By calculating the loadflow for 12 lines on Korea, the needs of energy storage devices are verified.
Communications protocols to be used for inter-unit and intra-unit serial data communications between subsystems aboard passenger trains are defined by this standard. Minimum acceptable parameters for a network that can simultaneously handle monitoring and control traffic from multiple systems are set forth.While the network is not vital, it is intended to be capable of carrying vital messages
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