Earth Potential as the Energy Storage in Rail Transit System - on a Vertical Alignment Optimization Problem

2018 ◽  
Author(s):  
Chaoxian Wu ◽  
Shaofeng Lu ◽  
Fei Xue ◽  
Lin Jiang
Keyword(s):  
Energy Storage ◽  
Optimization Problem ◽  
Rail Transit ◽  
Vertical Alignment ◽  
Transit System ◽  
Earth Potential

scholarly journals Flywheel vs. Supercapacitor as Wayside Energy Storage for Electric Rail Transit Systems

Inventions ◽  
2019 ◽  
Vol 4 (4) ◽  
pp. 62
Author(s):  
Mahdiyeh Khodaparastan ◽  
Ahmed Mohamed
Keyword(s):  
Energy Storage ◽  
Energy Saving ◽  
Voltage Regulation ◽  
Appropriate Technology ◽  
Rail Transit ◽  
Peak Demand ◽  
Transit System ◽  
Transit Systems ◽  
Industrial Sectors ◽  
Demand Reduction

Energy storage technologies are developing rapidly, and their application in different industrial sectors is increasing considerably. Electric rail transit systems use energy storage for different applications, including peak demand reduction, voltage regulation, and energy saving through recuperating regenerative braking energy. In this paper, a comprehensive review of supercapacitors and flywheels is presented. Both are compared based on their general characteristics and performances, with a focus on their roles in electric transit systems when used for energy saving, peak demand reduction, and voltage regulation. A cost analysis is also included to provide initial guidelines on the selection of the appropriate technology for a given transit system.

Capacity Configuration and Energy Control Strategy of Stationary Super Capacitor Energy Storage System of Urban Rail Transit

2014 ◽  
Vol 986-987 ◽  
pp. 1918-1925 ◽  
Author(s):  
Bin Wang ◽  
Zhong Ping Yang ◽  
Fei Lin
Keyword(s):  
Energy Storage ◽  
Control Strategy ◽  
Storage System ◽  
Energy Storage System ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Energy Control ◽  
Super Capacitor ◽  
Transit System ◽  
Urban Rail

The installation of super capacitor in urban rail transit system allows the recovery of the braking energy for increasing the energy efficiency as well as a better pantograph voltage profile. An energy control strategy of the energy storage system which is suitable for the urban railway transit is proposed in this paper. Then, the methodology of capacity configuration is put forward based on the simulation platform in Matlab environment. Ultimately, the capacity configuration results of super capacitor energy storage system are determined based on parameters of an actual metro line under different traffic conditions.

scholarly journals Light Rail Transit System Energy Flow Analysis for the Case of Addis Ababa City: For the Application of Regenerative Energy and Energy Storage

2021 ◽  
Author(s):  
Asegid Kebede ◽  
Getachew Biru Worku
Keyword(s):  
Energy Storage ◽  
Energy Flow ◽  
Addis Ababa ◽  
Light Rail ◽  
Rail Transit ◽  
Light Rail Transit ◽  
Drive Cycle ◽  
Transit System ◽  
Energy Flows ◽  
System Energy

Abstract Significant amounts of energy can be saved by installing energy storage on an electrified transit system allowing energy from braking to be captured. The amount of energy saved is dependent on the amount of energy transferred during braking which relies on the drive cycle and the vehicle parameters. Additional energy is saved through a lower overall energy requirement of train, which results in a reduction in traction supply losses. The overall benefit can be determined by analyzing the energy flow through components in an electrified transit system and hence determining the change in energy dissipations when energy storage is installed. In this paper, electrified transit system energy flows are analyzed for the implementation of energy storage system on board on Addis Ababa light rail transit. The methodology used assesses energy flows in the traction system, establishing where energy is dissipated. The analysis is performed for a specified drive cycle. Finally, the analysis showed that 36 % of traction energy could be saved through the implementation of energy storage on the Addis Ababa light rail transit.

scholarly journals Core Stress Analysis of Amorphous Alloy Transformer for Rail Transit under Different Working Conditions

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 164
Author(s):  
Jianwei Shao ◽  
Cuidong Xu ◽  
Ka Wai Eric Cheng
Keyword(s):  
Amorphous Alloy ◽  
Working Conditions ◽  
Short Circuit ◽  
Element Model ◽  
Operating Conditions ◽  
Iron Core ◽  
Rail Transit ◽  
Transit System ◽  
The Core ◽  
Distribution Transformers

The rail transit system is a large electric vehicle system that is strongly dependent on the energy technologies of the power system. The use of new energy-saving amorphous alloy transformers can not only reduce the loss of rail transit power, but also help alleviate the power shortage situation and electromagnetic emissions. The application of the transformer in the field of rail transit is limited by the problem that amorphous alloy is prone to debris. this paper studied the stress conditions of amorphous alloy transformer cores under different working conditions and determined that the location where the core is prone to fragmentation, which is the key problem of smoothly integrating amorphous alloy distribution transformers on rail transit power supply systems. In this study, we investigate the changes in the electromagnetic field and stress of the amorphous alloy transformer core under different operating conditions. The finite element model of an amorphous alloy transformer is established and verified. The simulation results of the magnetic field and stress of the core under different working conditions are given. The no-load current and no-load loss are simulated and compared with the actual experimental data to verify practicability of amorphous alloy transformers. The biggest influence on the iron core is the overload state and the maximum value is higher than the core stress during short circuit. The core strain caused by the side-phase short circuit is larger than the middle-phase short circuit.

Timetables for a Suburban Rail Transit System

1969 ◽  
Vol 3 (4) ◽  
pp. 297-316 ◽  
Author(s):  
Franz J. M. Salzborn
Keyword(s):  
Rail Transit ◽  
Transit System
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