scholarly journals On-Board and Wayside Energy Storage Devices Applications in Urban Transport Systems—Case Study Analysis for Power Applications

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 2013 ◽  
Author(s):  
Petru Valentin Radu ◽  
Miroslaw Lewandowski ◽  
Adam Szelag
Keyword(s):  
Energy Storage ◽  
Control Method ◽  
Urban Transport ◽  
Transport Systems ◽  
Light Rail ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Case Study Analysis ◽  
Traction Power Supply ◽  
Free Section

This paper investigates the benefits of using the on-board energy storage devices (OESD) and wayside energy storage devices (WESD) in light rail transportation (metro and tram) systems. The analysed benefits are the use of OESD and WESD as a source of supply in an emergency metro scenario to safely evacuate the passengers blocked in a metro train between stations; the use of OESD for catenary free sections, the benefits of using the WESD as an energy source for electrical car charging points and tram traction power supply; the benefits of using a central communication system between trams, cars, WESD and electrical car charging points. The authors investigated the use of: OESD with batteries for a catenary free section for different scenarios (full route or a catenary free section between two stations); the charge of OESD between stations (in parallel with tram motoring) to decrease the charging dwell time at stations and to help in achieving the operational timetable; the thermal effect of the additional load on the overhead contact system (OCS) when the tram is charging between stations; the sizing of OESD and WESD for emergency feeding in a metro system. The authors investigated the use of the WESD as a source of energy for the electrical car charging points to reduce the car pollution and carbon emissions. Presented in the paper is the enhanced multi train simulator with WESD prepared for the analyses conducted. The paper describes the DC electrical solver and WESD control method. A validation of the software has been conducted in regard to the substation voltage, WESD energy balance and WESD control.

scholarly journals Analysis of the influence of train timetable on energy consumption on the metro line

2018 ◽  
Vol 180 ◽  
pp. 05001
Author(s):  
Sławomir Barański ◽  
Marcin Steczek
Keyword(s):  
Energy Consumption ◽  
Energy Storage ◽  
Operating Conditions ◽  
Transport Systems ◽  
Voltage Source ◽  
Storage Device ◽  
Basic Solution ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Traction Substations

The latest technical solutions provide new opportunities for reducing energy consumption in electrified transport systems. The basic solution is to eliminate vehicles based on resistor start-up system and replace them with vehicles equipped with semiconductor based converter propulsion system (choppers and voltage source inverters). This type of drive also allows to recover energy (recuperation) from train braking, which is repeated very often case of metro lines. The problem is to find the receiver for this energy while the vehicle is braking. Large opportunities are also available when using various types of energy storage devices: stationary installed on the side of traction line and mobile ones used on-board the traction vehicles. Choosing the type of energy storage device for operating conditions, their capacity and the location of installation are complex optimization processes. This type of solution involves significant financial input, which reimbursement is spread over a long period of time. Therefore, it seems rational to seek solutions with limited financial outlay. This paper presents a solution analysis of adjusting the timetable and timeshifts between vehicle streams on the metro line to increase the efficiency of energy recovery of regenerative braking vehicles. This operation will reduce the amount of energy consumption by vehicles from the traction substations. The results presented in the paper were obtained by computer simulation of operation on the first line of the Warsaw subway, assuming that there was no energy storage devices and traction substations were operating without recuperation of the energy to the power system.

scholarly journals The Use of Energy Storage Devices of Uncontrolled Type on the Moscow Metro (Theory and Practice)

2018 ◽  
Vol 14 (2) ◽  
Author(s):  
Shevlyugin Maxim Valerievich ◽  
Alexandr Nikolaevich Stadnikov ◽  
Anastasiya Evgenievna Golitsyna
Keyword(s):  
Energy Storage ◽  
Power Supply ◽  
Storage Device ◽  
Experimental Measurements ◽  
Energy Storage Device ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Traction Substation ◽  
Traction Power Supply ◽  
Traction Power

The problem of increasing energy saving and energy efficiency in the system of traction power supply of the Moscow Metro is considered due to the use of energy storage devices of uncontrolled type. The results of simulation modeling of the operation of an energy storage device of uncontrolled type in the system of traction power supply of the subway are presented.A particular line of the Moscow Metro, Filevskaya, was studied, on which experiments on the introduction of energy storage devices based on electrochemical super capacitors were conducted.With the help of experimental measurements, the electric power indicators of the operation of a stationary energy storage device had been obtained at regular service on the traction substation of the Filevskaya line of the Moscow Metro for several months. The maximum levels of the converted energies, the cyclicity, the efficiency of the plant operation, and the amount of the energy economy are determined.By statistical processing of the instantaneous values of the performance of the traction substation with the accumulator and the analysis of the data of the energy monitoring of the Moscow metro, an important parameter of reducing the installed capacity was investigated. The similarity of the data of theoretical calculations and experimental measurements is shown.

scholarly journals Direct voltage control for stand-alone wind energy conversion systems with energy storage

2021 ◽  
Author(s):  
Wei Huang
Keyword(s):  
Energy Storage ◽  
Power System ◽  
Control Method ◽  
Voltage Control ◽  
Power Converter ◽  
Induction Generator ◽  
Storage Device ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Direct Voltage

A control method for the stand-alone wind power generation system with induction generator and energy storage devices is proposed in this thesis. A fixed-speed self-excited induction generator is directly connected to the standalone power system, while battery powered energy storage devices are employed to balance the system power flow. A DC-AC power converter is connected between the energy storage device and the standalone power system, which maintains the voltage and frequency constant. Direct voltage control with current limits is developed for the converter with dynamic fast response. Mathematical models are developed to analysis the system performance as well as to design the lead-lag regulators in the control system. The proposed system is verified in the simulation and experiment.

scholarly journals Power supply of trams in Poland – current state and perspectives of development

2018 ◽  
Vol 180 ◽  
pp. 03005
Author(s):  
Adam Szeląg ◽  
Tadeusz Maciołek
Keyword(s):  
Energy Efficiency ◽  
Power Supply ◽  
Autonomous Vehicles ◽  
Urban Transport ◽  
Transport Systems ◽  
Rolling Stock ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Higher Power ◽  
Supply Systems

Sustainable development of agglomerations requires efficient and ecological transport systems, i.e. electrified transport. In order to achieve the required results of operation of electrified urban transport, especially energy efficiency, it is required to closely examine the existing power supply systems. The biggest share of urban traction systems in Poland belongs to tram systems (in 15 agglomerations and cities). Recent years have witnessed an increased interest in modernisation of the existing lines and construction of new ones. Enhancement of RAMS (Reliability, Availability, Maintainability, and Safety) and energy efficiency of supply systems is a necessary requirement, due to fact that new, modern tram rolling stock with higher power poses significant challenge for the existing, in many systems, old power supply infrastructure. Furthermore, due to low driving-range of autonomous vehicles equipped with batteries and a need of frequent charging of storage devices, catenary supplied urban transport will dominate in the areas of its use. In addition, it might be helpful in developing hybrid vehicles supplied both from a catenary and from energy storage devices (charged during run under catenary) on sections without catenary. The paper presents parameters characterizing tram power supply systems in Poland. The analyses carried out for many tram lines have shown that even at relatively low investments for modernisation of the tram power supply system, it is possible to obtain fast return (energy saving due to improvement of efficiency of recuperation and the resulting reduction of CO2 emission). Other advantages of modernisations include: enhancement of standards in supply of modern trams with higher power and improvement of reliability due to the reduced risk of disturbances and damages.

scholarly journals Analysis of wayside energy storage devices for DC heavy rail transport

2018 ◽  
Vol 180 ◽  
pp. 04001 ◽  
Author(s):  
Petru Valentin Radu ◽  
Zbigniew Drazek
Keyword(s):  
Energy Storage ◽  
Supply Voltage ◽  
Rail Transport ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Payback Time ◽  
Traction Power Supply ◽  
The Cost ◽  
Heavy Rail

The proposed paper presents the possibility of using the wayside energy storage devices (WESD) for the DC Heavy Rail Transport treating the design, costs and payback time. Moreover a case study comparison for the use of wayside energy storage devices on the heavy transport at the supply voltage of 3.3kV DC is presented. A method of sizing the energy storage devices using vehicle characteristics, traction power supply and running timetable is presented. The paper also presents the cost analysis for the most commonly used energy storage devices and the payback time.

scholarly journals Selection of electricity storage devices for mobile DC traction substations

2021 ◽  
Vol 2131 (4) ◽  
pp. 042082
Author(s):  
O A Stepanskaya ◽  
N D D’yachkova ◽  
A B Batrashov
Keyword(s):  
Energy Storage ◽  
Power Supply ◽  
Power Plants ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Advantages And Disadvantages ◽  
Traction Substations ◽  
Traction Power Supply ◽  
Supply Systems ◽  
Traction Power

Abstract The aim of the study is to review the sources covering the problems of accumulating electricity on the railways and to find new solutions to reduce the use of electricity in traction power supply system. The article analyses some existing types of electric energy storage devices (capacitive, inertial, superconducting inductive, electrochemical, fuel cells and pumped storage power plants), their common installation locations, advantages, and disadvantages. The possibility of using them in railway traction power supply systems, in particular in mobile traction substations, is also assessed. In addition, the article lists the parameters on the basis of which the optimum type of storage device can be selected for the given conditions. The study concludes that the use of some types of energy storage devices in mobile traction substations is acceptable when regenerative braking can be used at the site, and this method of energy saving can be recommended in the engineering of new or reconstruction of existing traction substations. It has been found that capacitive and inertial (flywheel) electrical energy storage units are the most suitable in terms of parameters for installation of traction power supply systems.

An aqueous hybrid electrolyte for low-temperature zinc-based energy storage devices

2020 ◽  
Vol 13 (10) ◽  
pp. 3527-3535 ◽  
Author(s):  
Nana Chang ◽  
Tianyu Li ◽  
Rui Li ◽  
Shengnan Wang ◽  
Yanbin Yin ◽  
...  
Keyword(s):  
Energy Storage ◽  
Low Temperature ◽  
Energy Storage Devices ◽  
Storage Devices

A frigostable aqueous hybrid electrolyte enabled by the solvation interaction of Zn2+–EG is proposed for low-temperature zinc-based energy storage devices.

Ultrathin Carbon Nanosheets for Highly-efficient Capacitive K-ion and Zn-ion Storage

2020 ◽  
Author(s):  
Yamin Zhang ◽  
Zhongpu Wang ◽  
Deping Li ◽  
Qing Sun ◽  
Kangrong Lai ◽  
...  
Keyword(s):  
Energy Storage ◽  
Porous Carbon ◽  
Metal Ion ◽  
Rate Capability ◽  
Energy Storage Devices ◽  
Capacity Retention ◽  
Carbon Nanosheets ◽  
Storage Devices ◽  
High Efficient ◽  
Ion Storage

<p></p><p>Porous carbon has attracted extensive attentions as the electrode material for various energy storage devices considering its advantages like high theoretical capacitance/capacity, high conductivity, low cost and earth abundant inherence. However, there still exists some disadvantages limiting its further applications, such as the tedious fabrication process, limited metal-ion transport kinetics and undesired structure deformation at harsh electrochemical conditions. Herein, we report a facile strategy, with calcium gluconate firstly reported as the carbon source, to fabricate ultrathin porous carbon nanosheets. <a>The as-prepared Ca-900 electrode delivers excellent K-ion storage performance including high reversible capacity (430.7 mAh g<sup>-1</sup>), superior rate capability (154.8 mAh g<sup>-1</sup> at an ultrahigh current density of 5.0 A g<sup>-1</sup>) and ultra-stable long-term cycling stability (a high capacity retention ratio of ~81.2% after 4000 cycles at 1.0 A g<sup>-1</sup>). </a>Similarly, when being applied in Zn-ion capacitors, the Ca-900 electrode also exhibits an ultra-stable cycling performance with ~90.9% capacity retention after 4000 cycles at 1.0 A g<sup>-1</sup>, illuminating the applicable potentials. Moreover, the origin of the fast and smooth metal-ion storage is also revealed by carefully designed consecutive CV measurements. Overall, considering the facile preparation strategy, unique structure, application flexibility and in-depth mechanism investigations, this work will deepen the fundamental understandings and boost the commercialization of high-efficient energy storage devices like potassium-ion/sodium-ion batteries, zinc-ion batteries/capacitors and aluminum-ion batteries.</p><br><p></p>

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