Optimization of using recuperative braking energy on a double-track railway line

In the article, possible ways of using energy recovered during regenerative braking of trains are presented. It is pointed out that the return of recovered electricity directly to the catenary and its use in the energy cooperation of vehicles can be a no-cost method (without additional infrastructure). The method of energy cooperation between trains and its main assumptions, that uses the law of conservation of energy, are described in detail. An original model is proposed which assumes optimization by controlling the train arrival time at the station within the technical time reserve. Optimization method was used metaheuristic and adapted swarm algorithm called the firefly algorithm. An exemplary simulation of the energy cooperation of trains for selected stops of a double-track railway line of the Tricity Rapid Urban Railway has been done and the obtained results are presented. Finally, in discussion and conclusions, the results were summarized and the significance of the development of the discussed method for transport rationalization was presented.

Download Full-text

Operational criteria in the justification of electrification of railway lines

MATEC Web of Conferences ◽

10.1051/matecconf/201818006005 ◽

2018 ◽

Vol 180 ◽

pp. 06005

Author(s):

Andrzej Massel

Keyword(s):

Rolling Stock ◽

The Political ◽

Economic Factors ◽

Single Track ◽

Railway Network ◽

Railway Line ◽

Passenger Traffic ◽

Post War ◽

Operational Criteria ◽

Double Track

The process of electrification of the Polish railways took place from 1936 till early 1990s. Despite the political constraints of the post-war times, the decisions on electrification of particular sections of the railway network were usually based on economic factors. In 1970s and 1980s so called electrification thresholds were used to justify the need for electrification of railway line in question. They took into the number of tracks (single-track lines, double-track lines), terrain conditions (flat terrain, upland terrain) and the traffic structure (the share of passenger traffic) into account. In the framework of National Railway Program till 2023 (KPK) the realization of electrification projects have been undertaken again. The present paper deals with importance of the operational criteria in the decision-making concerning justification of electrification of railway lines. These criteria include the shortening of the journey times on particular sections, shortening of stops on the stations with the change of the type of traction, the savings of train operating companies resulting from the traction unification (change of demand for rolling stock and for workshops for its servicing), improvement of reliability and punctuality of services.

Download Full-text

Railway Planning Double-Double Track (Case Study of Bekasi Station km 26 + 652 - Jatinegara Station km 12 + 050

IJTI (International Journal Of Transportation And Infrastructure) ◽

10.29138/ijti.v4i1.1161 ◽

2020 ◽

Vol 4 (1) ◽

pp. 12-21

Author(s):

Ido Prasetio ◽

Andri Irfan Rifai

Keyword(s):

Human Error ◽

Urban Land Use ◽

Single Track ◽

Train Track ◽

Railway Line ◽

Railway Planning ◽

Physical Changes ◽

Double Track ◽

The Impact

Increasing the number of population and the development of activities will cause a growing need for space every day, this will result in physical changes and urban land use and can cause increased intensity of population movement from Megapolitan cities such as Bekasi, Bogor and Tangerang to the Metropolitan city (DKI Jakarta). Some people have now started to move from private vehicles to use public (mass) transportation such as buses, transjakarta, and electric rail trains or commonly known as KRL Commuter Line that serve Jabodetabek routes. The impact of crossing also causes buildup at each station. Train track with a single track (single track) is considered ineffective and inefficient and vulnerable to train accidents due to human error. It is necessary to develop or develop a double track to become a double-double track Bekasi Station km 26 + 652 - Jatinegara Station km 12 + 050. The research location is on the railway line from Bekasi Station to Jatinegara Station. The length of the train track is around 16 km and has 7 stations that are traversed, 5 of which are active (stop) and 2 passive stations.

Download Full-text

The architecture of decision-making support systems used for the rational railway capacity management

10.5592/co/cetra.2020.1179 ◽

2021 ◽

Author(s):

Ivica Ljubaj ◽

Tomislav Josip Mlinarić ◽

Slavko Vesković ◽

Dušan Jeremić

Keyword(s):

Decision Making ◽

Support System ◽

Traffic Control ◽

Support Systems ◽

Specific Model ◽

Railway Transport ◽

Railway Line ◽

Railway Capacity ◽

Double Track ◽

Decision Making Support

Decision-making support systems in railway transport are systems that make it easier for traffic controllers and dispatchers involved in the regulation of train traffic to make individual decisions more easily and accurately. Without such systems, dispatchers usually make decisions based on previous experiences and feelings they have developed working in train traffic control. However, quality decision-making support systems are based on large amounts of data processed by one or several different artificial intelligence techniques. This paper will examine the architecture of such a system in railway transport, which helps the dispatcher to make decisions based on different criteria and values of individual criteria. The architecture of this decision-making support system has been developed to equal or, if necessary, use the maximum available double-track railway line capacity to resolve delays caused by lack of capacity for any given route. This system has been developed for the specific configuration of a double track, whereby each track is intended for one direction of train traffic. This paper will lay the foundation for understanding decision-making support systems and for the development of a specific model of decision-making support system in practice.

Download Full-text

Simulating the Effects of Noncrossing Block Sections Setting Rules on Capacity Loss of Double-Track Railway Line due to the Operation of out-of-Gauge Trains

Discrete Dynamics in Nature and Society ◽

10.1155/2016/2319437 ◽

2016 ◽

Vol 2016 ◽

pp. 1-16 ◽

Cited By ~ 2

Author(s):

Yinggui Zhang ◽

Qiong-fang Zeng ◽

Dingyou Lei ◽

Xinyu Wang

Keyword(s):

Assessment Model ◽

Simulation Experiments ◽

Railway Line ◽

Capacity Loss ◽

Operation Rules ◽

Upstream Direction ◽

Optimal Setting ◽

Railway Capacity ◽

Set Up ◽

Double Track

Dispatchers often set noncrossing block sections (NCBSs) for railway out-of-gauge train (OGT) running on double-track railway line for safety reasons. In this paper, we will investigate the best location, length, and number of noncrossing block sections to reduce railway capacity loss due to the operation of OGTs. Firstly, yielding, overtaking, stopping, starting, and other operation rules for OGTs running on double-track railway line were designed, and a simulation model based on cellular automata was further put forward. Then, an assessment model for double-track railway line capacity loss due to the operation of OGTs was set up. Some simulation experiments and the comparisons of these results were further given to achieve the optimal setting of NCBS for OGTs running on double-track railway line. In the case of NCBSs number minus one, capacity loss caused by the operation of OGTs can be reduced up to 15.2% in the upstream direction and 6.3% in the downstream direction. Also, the NCBSs should lie at the nearest block sections (BSs) to depot stations and the NCBSs lengths should be as less as possible.

Download Full-text

A Method for Generating the Timetable of Double-Track Railway Line

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.347-350.2501 ◽

2013 ◽

Vol 347-350 ◽

pp. 2501-2505

Author(s):

Yan Zhang ◽

Yan Ping Cui ◽

Wen Tao Yang

Keyword(s):

Ant Colony Optimization ◽

Ant Colony ◽

Scheduling Problem ◽

Freight Train ◽

Train Scheduling ◽

Railway Line ◽

Run Time ◽

Double Track

Passenger and freight train scheduling problem on double-track railway line is considered by using Ant Colony Optimization (ACO) algorithm. The aim is to reasonably arrange the dispatch sequence of the trains to minimize the total run time. The constrains in train scheduling problem are considered and the model is established. Due to the complexity of train scheduling problem, this problem is solved by ACO and implemented by programming. A case study is presented to illustrate the solution. The results illustrate that the proposed method is effective to solve the scheduling problem on double-track railway line.

Download Full-text

An algorithm for precise localization of measurements in rolling stock-based diagnostic systems

Proceedings of the Institution of Mechanical Engineers Part F Journal of Rail and Rapid Transit ◽

10.1177/0954409720965798 ◽

2020 ◽

pp. 095440972096579

Author(s):

M Carnevale ◽

I La Paglia ◽

P Pennacchi

Keyword(s):

High Speed ◽

Diagnostic System ◽

Rolling Stock ◽

Diagnostic Systems ◽

Digital Maps ◽

Railway Line ◽

Good Repeatability ◽

Diagnostic Applications ◽

Matched Data ◽

Double Track

The paper describes the development and the validation of an algorithm for the geo-localization of trains, specifically designed for diagnostic applications of rolling stock and infrastructure. The algorithm exploits two signals commonly available on commercial trains, namely odometry and GPS, combined to overcome the drawbacks they both show when adopted individually. The algorithm’s flow consists of a map matching procedure for the projection of GPS acquisitions on digital maps of the railway line, followed by a robust fit to correlate the map-matched data to the odometry data. The system is specifically conceived to be adopted in rolling-stock based diagnostic system, to correlate the diagnostic indices to the actual position where they are gathered along the line. It is specifically designed to operate on double-track railways, even if its adoption in multi-track scenario typical of commuter rail would be possible by means of further integration with balise signals or other train control data. Results from track tests on a high-speed train with instrumented pantographs and bogies show that the developed algorithm allows to obtain a good repeatability of diagnostic indicators collected during repeated runs of the train along the same track. This result set the basis for the automation of data analysis in a wayside server, and for the computerization of the comparison of data belonging to homogeneous track sections, so as to perform a trend analysis.

Download Full-text

An accelerated-time microscopic simulation of a dedicated freight double-track railway line

Mathematical and Computer Modelling ◽

10.1016/j.mcm.2009.12.032 ◽

2010 ◽

Vol 51 (9-10) ◽

pp. 1160-1169 ◽

Cited By ~ 7

Author(s):

Antonio Hernando ◽

Eugenio Roanes-Lozano ◽

Alberto García-Álvarez

Keyword(s):

Microscopic Simulation ◽

Railway Line ◽

Double Track

Download Full-text

The Delay Simulation on Hierarchical Structure for Semi-Double Track of Railway Line Using Max-Plus Algebra

Journal of Science and Application Technology ◽

10.35472/281421 ◽

2019 ◽

Vol 2 (1) ◽

Author(s):

Tri Utomo ◽

Eristia Arfi

Keyword(s):

Hierarchical Structure ◽

Railway Line ◽

Double Track

Download Full-text

Organizing transportation on a double-track line under conditions of major overhaul on one track

Yugoslav journal of operations research ◽

10.2298/yjor0601097b ◽

2006 ◽

Vol 16 (1) ◽

pp. 97-105

Author(s):

Branislav Boskovic ◽

Milos Ivic ◽

Aleksandar Markovic

Keyword(s):

Decision Making ◽

Computer Simulation ◽

Analytical Models ◽

Traffic Intensity ◽

Major Overhaul ◽

Railway Line ◽

Traffic Organization ◽

Double Track ◽

Track Line

The problem of traffic organization on a railway line during the execution of civil works on super and sub-structures maintenance under the present conditions is becoming more and more difficult to solve, above all, due to the increased traffic intensity. In order to make decisions on indispensable measures to be taken under such circumstances, one needs information on train compositions and their delays, line capacity, facilities, etc. In order to obtain such information, it is necessary to use a computer simulation which significantly enhances the range of the problem to be solved and offers answers to the questions that cannot be solved by analytical models alone. The paper presents a simulation model of the trains? movement on a double-track line when one track is closed to traffic due to the work executions. Such model will provide a better quality of decision-making in the process of traffic organization under given circumstances.

Download Full-text