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Optimisation of a Catenary-Free Tramline Equipped With …
Since a shared electric grid is suffering from power superimposition when several trams charge at the same time, we propose to install stationary energy storage systems …
Optimal sizing of battery-supercapacitor energy storage systems …
A hybrid energy storage system (HESS) of tram composed of different energy storage elements (ESEs) is gradually being adopted, leveraging the advantages …
(PDF) An On-Board Battery System for Catenary Free Operation …
Abstract. An on-board energy storage system for catenary free operation of a tram is investigated, using a Lithium Titanate Oxide (LTO) battery system. The …
Optimal Sizing of On-Board Energy Storage Systems …
This paper introduces an optimal sizing method for a catenary-free tram, in which both on-board energy storage systems and charging infrastructures are considered.
Optimal Sizing of On-Board Energy Storage Systems and …
A mixed particle swarm optimization algorithm is utilized to find optimal solutions for three schemes: (1) ultracapacitors storage systems with fast-charging at each station; (2) …
Optimal sizing of battery-supercapacitor energy storage systems …
A hybrid energy storage system (HESS) of tram composed of different energy storage elements (ESEs) is gradually being adopted, leveraging the advantages of each ESE. …
Stationary and on-board storage systems to enhance energy and cost efficiency of tramway…
Braking energy of trams can be recovered in storage systems. • High power lithium batteries and supercapacitors have been considered. • Storage systems can be installed on-board or along the supply network. • A …
Supercapacitor and accelerating contact lines hybrid tram system
A supercapacitor and accelerating contact line hybrid tram system is proposed. A tram consumes high energy during acceleration but, low energy thereafter. Supercapacitors can be charged fast but, they have low energy density. During acceleration, a tram draws power from accelerating contact line.
Traction Power Wayside Energy Storage and Recovery Technology
Flywheel Energy Storage. Motor-driven, high-speed rotating mass contained in a vacuum. Up to 16,000 rpm (Beacon Power) 10,000 to 20,000 rpm (VYCON) Up to 45,000 rpm (Stornetic) Kinetic energy = 1/2 x mass x (speed)2. Magnetic bearings for rotor. Accelerated by regenerated power.
Optimal Sizing of On-Board Energy Storage Systems and Stationary Charging Infrastructures for a Catenary-Free Tram …
Schematic diagrams of different energy supplies for the catenary-free tram: (a) UC storage systems with fast-charging at each station (US-FC), (b) battery storage systems with slow-charging at ...
Optimization for a fuel cell/battery/capacity tram with equivalent …
For the ultra-capacitor, its total capacity is 15.75 F, its electric energy is 0.5 kWh and its rated power is 130 kW. Compared with the tram in [13], the power-train structure is similar to ours, but the power component size is a little different.
Optimal Sizing of On-Board Energy Storage Systems and Stationary Charging Infrastructures for a Catenary-Free Tram …
Energies 2020, 13, 6227 2 of 21 the OESS, including charging power and charging energy [8,9]. Hence, the stationary energy supply, that is, charging the OESS to a high (or full) state-of-charge ...
Optimal Sizing of On-Board Energy Storage Systems and Stationary Charging Infrastructures for a Catenary-Free Tram
without catenary, an on-board energy storage systems (OESS) has been utilized in urban transit [4–6]. For the tram powered by OESS, namely catenary-free tram, the overhead power cables between stations are removed. Instead, the catenary-free tram is
Overall capacity allocation of energy storage tram with ground …
Through a comparative analysis and compared with the existing pure supercapacitor "station charging" mode, the new capacity configuration scheme proposed in this study would reduce the average daily cost by 9.8% and save 10.64 million yuan in the overall cost. The charging power requirements would be reduced by 66.7%.
Energy Efficiency Analysis of Pumped Storage Power Stations in …
Energy efficiency reflects the energy-saving level of the Pumped Storage Power Station. In this paper, the energy flow of pumped storage power stations is analyzed firstly, and then the energy loss of each link in the energy flow is researched. In addition, a calculation method that can truly reflect the comprehensive efficiency level of …
Autonomous-rail Rapid Transit Tram: System Architecture, …
The ART tram is equipped with four 150 kW inverters and matching pickup coils, which receive power through inductive ground transmission. The power supply can reach more than 500 kW, with a static efficiency of over 90% and a dynamic efficiency of over 85%. The architecture is shown in the Fig. 9 below.
Parameters of tram and line. | Download Table
A mixed particle swarm optimization algorithm is utilized to find optimal solutions for three schemes: (1) ultracapacitors storage systems with fast-charging at each station; (2) battery...
Energy Storage System Design for Catenary Free Modern Trams
According to the 100 A monomer charging and discharging test, each single monomer will actually release energy of 22 Wh. The number of monomers assembled on the vehicle energy storage system is 2160. Therefore, the actual energy storage is 47.6 kWh. Fully Regenerative Braking Power Absorption of Traction System.
Study on profit model and operation strategy optimization of energy storage power station …
With the acceleration of China''s energy structure transformation, energy storage, as a new form of operation, plays a key role in improving power quality, absorption, frequency modulation and power reliability of the grid [1]. However, China''s electric power market is not perfect, how to maximize the income of energy storage power station is an …
Stochastic optimization of a stationary energy storage system for …
Compared with traditional tram powered by a DC catenary, energy efficiency of the catenary-free tram can be enhanced considerably due to increased recuperation of braking energy [4], [5]. For traditional tramlines, the regenerative energy of the trams is not stored, but rather immediately delivered to adjacent trams that are in an …
Onboard energy storage in rail transport: Review of …
The storage devices featured 600 Wh and 180 kW of rated energy and power, with a total weight of 430 kg and consequent specific energy and power of 1.4 Wh/kg and 418 W/kg, respectively. …
Technologies for Energy Storage Power Stations Safety …
As large-scale lithium-ion battery energy storage power facilities are built, the issues of safety operations become more complex. The existing difficulties revolve around effective battery health evaluation, cell-to-cell variation evaluation, circulation, and resonance suppression, and more. Based on this, this paper first reviews battery health evaluation …
COLLABORATIVE OPTIMIZATION OF MANAGEMENT …
Sizing is the key step of the tram''s hybrid storage system optimization, and it has an impact on the characteristics of the energy storage system.
Energies | Free Full-Text | Optimization of Energy Management …
There are two kinds of non-grid power supply technologies: sectional ground power supply technology and on-board energy storage technology. The more commonly used is on …
EV''s as energy storage on urban light rail systems — A synergy …
This paper explores the possibility of using EV''s as temporary trackside energy storage systems on urban light rail systems through the use of bi-directional connection interfaces (chargers), which allow use of the vehicle battery in typical V2X scenarios. The paper uses the city of Sheffield (UK) Supertram network as an example …
World''s largest compressed air energy storage power station …
The power station, with a 300MW system, is claimed to be the largest compressed air energy storage power station in the world, with highest efficiency and lowest unit cost as well. With a total investment of 1.496 billion yuan ($206 million), its rated design efficiency is 72.1 percent, meaning that it can achieve continuous discharge for six ...
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Each battery pack of the on-board battery energy storage system includes 324 series and 4 parallels. The capacity of the lithium titanate battery is 10 Ah. In the actual charging process, a battery pack is placed under a certain temperature condition. The maximum chargeable current is related to the state of charge.
Energy management strategy optimization for hybrid energy …
Trams with energy storage are popular for their energy efficiency and reduced operational risk. An effective energy management strategy is optimized to enable …
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