scholarly journals TRAIN RESCHEDULING GENERATION CONSIDERING ROLLING STOCK TYPES AND CLOSED-OFF AREAS

2018 ◽  
Author(s):  
TERUOMI KATORI ◽  
TAKASHI IZUMI
Keyword(s):  
Rolling Stock ◽  
Train Rescheduling ◽  
Stock Types

Real-time integrated train rescheduling and rolling stock circulation planning for a metro line under disruptions

2021 ◽  
Vol 152 ◽  
pp. 87-117
Author(s):  
Yihui Wang ◽  
Kangqi Zhao ◽  
Andrea D’Ariano ◽  
Ru Niu ◽  
Shukai Li ◽  
...  
Keyword(s):  
Real Time ◽  
Rolling Stock ◽  
Train Rescheduling

scholarly journals Railway Freight Transport and Logistics: Methods for Relief, Algorithms for Verification and Proposals for the Adjustment of Tunnel Inner Surfaces

2018 ◽  
Vol 10 (9) ◽  
pp. 3145 ◽  
Author(s):  
Giuseppe Loprencipe ◽  
Laura Moretti ◽  
Tiziana Pestillo ◽  
Ricardo Ferraro
Keyword(s):  
Laser Scanner ◽  
Freight Transport ◽  
Rolling Stock ◽  
Railway Freight ◽  
Innovative Methodology ◽  
Different Types ◽  
Stock Types ◽  
Ground Penetrating ◽  
Railway Freight Transport

In Europe, the attention to efficiency and safety of international railway freight transport has grown in recent years and this has drawn attention to the importance of verifying the clearance between vehicle and lining, mostly when different and variable rolling stock types are expected. This work consists of defining an innovative methodology, with the objective of surveying the tunnel structures, verifying the clearance conditions, and designing a retrofitting work if necessary. The method provides for the use of laser scanner, thermocameras, and ground penetrating radar to survey the geometrical and structural conditions of the tunnel; an algorithm written by the authors permits to verify the clearances. Two different types of works are possible if the inner tunnel surfaces interfere with the profile of the rolling stock passing through: modification of the railroad track or modification of the tunnel intrados by mean milling of its lining. The presented case study demonstrates that the proposed methodology is useful for verifying compatibility between the design vehicle gauge and the existing tunnel intrados, and to investigate the chance to admit rolling stocks from different states. Consequently, the results give the railway management body a chance to perform appropriate measurements in those cases where the minimum clearance requirements are not achieved.

Robust Capacitated Train Rescheduling with Passenger Reassignment under Stochastic Disruptions

2021 ◽  
pp. 036119812110285
Author(s):  
Xin Hong ◽  
Lingyun Meng ◽  
Francesco Corman ◽  
Andrea D’Ariano ◽  
Lucas P. Veelenturf ◽  
...  
Keyword(s):  
High Speed ◽  
Mathematical Formulation ◽  
Mixed Integer ◽  
Rolling Stock ◽  
Modeling Framework ◽  
Railway Line ◽  
Time Space ◽  
Space Modeling ◽  
Train Rescheduling ◽  
Linear Programming Formulation

During railway operations unexpected events may occur, influencing normal traffic flows. This paper focuses on a train rescheduling problem in a railway system with seat-reserved mechanism during large disruptions, such as a rolling stock breakdown leading to some canceled services, where passenger reassignment strategies have also to be considered. A novel mixed-integer linear programming formulation is established with consideration of train retiming, reordering, and reservicing. Based on a time–space modeling framework, a big- M approach is adopted to formulate the track occupancy and extra train stops. The formulation aims to maximize the passenger accessibility measured by the amount of the transported passengers subject to canceled services and to minimize the weighted total train delay for all trains at their destinations. The proposed mathematical formulation also considers planning extra stops for non-canceled trains to transport the disrupted passengers, which were supposed to travel on the canceled services, to their pre-planned destinations. Other constraints deal with seat capacity limitation, track capacity, and some robustness measures under uncertainty of disruption durations. We propose different approaches to compute advanced train dispatching decisions under a dynamic and stochastic optimization environment. A series of numerical experiments based on a part of “Beijing–Shanghai” high-speed railway line is carried out to verify the effectiveness and efficiency of the proposed model and methods.

Analysis and Design of 3.3 kV IGBT Based Three-Level DC/DC Converter with High-Frequency Isolation and Current Doubler Rectifier

2009 ◽  
Vol 25 (25) ◽  
pp. 103-108
Author(s):  
Dmitri Vinnikov ◽  
Tanel Jalakas ◽  
Indrek Roasto
Keyword(s):  
High Voltage ◽  
High Frequency ◽  
Power Converter ◽  
Rolling Stock ◽  
Analysis And Design ◽  
Auxiliary Power ◽  
Igbt Modules ◽  
Isolation Transformer ◽  
New Generation ◽  
Generation Power

Analysis and Design of 3.3 kV IGBT Based Three-Level DC/DC Converter with High-Frequency Isolation and Current Doubler RectifierThe paper presents the findings of a R&D project connected to the development of auxiliary power supply (APS) for the high-voltage DC-fed rolling stock applications. The aim was to design a new-generation power converter utilizing high-voltage IGBT modules, which can outpace the predecessors in terms of power density, i.e. to provide more power for smaller volumetric space. The topology proposed is 3.3 kV IGBT-based three-level neutral point clamped (NPC) half-bridge with high-frequency isolation transformer and current doubler rectifier that fulfils all the targets imposed by the designers. Despite an increased component count the proposed converter is very simple in design and operation. The paper provides an overview of the design with several recommendations and guidelines. Moreover, the simulation and experimental results are discussed and the performance evaluation of the proposed converter is presented.

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