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-board energy storage …
This study presents the recent application of energy storage devices in electrified railways, especially batteries, flywheels, electric double layer capacitors and hybrid energy storage devices. Th... 2.1.2 Batteries for …
Traction power fluctuations have economic and environmental effects on high-speed railway system (HSRS). The combination of energy storage system (ESS) and HSRS shows a promising potential for utilization of regenerative braking energy and peak shaving and valley filling. This paper studies a hybrid energy storage system (HESS) for …
Battery Energy Storage • Some History… –First battery systems used lead acid batteries (low-cost, high-capacity) –Lead acid batteries provide high power density and long-duration output (hours) –Lead acid batteries …
In order to design a well-performing hybrid storage system for trams, optimization of energy management strategy (EMS) and sizing is crucial. This paper proposes an improved ...
To continuously operate, the auxiliary energy-storage device must store sufficient energy to provide power in excess of the continuously rated power of the fuel cell [24]. It should also have a fast transient response at start-ups, provide peak power during the duty cycle and have the ability to recover energy by regenerative braking [25] .
To reduce required size of On-Board Energy Storage Device (OBESD), Accelerating Contact Line (ACL) and on-board battery storage hybridization concept was presented in [9, 10]. Briefly, an ACL is a short contact line extending from a stopping station, it is used to supply power to a train during dwelling and acceleration (as the train leaves …
In recent times, there has been growing interest among researchers in aqueous energy storage devices that utilize non-metallic ammonium ions (NH4+) as charge carriers. However, the selection of suitable materials for ammonium storage presents significant challenges. The understanding of the energy storage me
A coil spring booster (CSB) was proposed for regenerative braking in sustainable city trams. ... Wei et al. [39] investigated the influence of lithium-ion batteries and ultracapacitors as energy storage devices on storage systems. Chemical batteries have high but ...
The new Sitras HES hybrid energy storage system consists of two energy-storing components: the Sitras MES mobile energy storage unit (double-layer capacitor, DLC) and a nickel-metal hydride battery. Vehicles equipped with energy storage systems consume up to 30% less energy per year and produce up to 80 metric tons less CO2 emission than …
The energy storage system on the trams has been convinced to meet the requirements of catenary free tram network for both at home and abroad. This technology …
978-1-7281-2124-6/19/$31.00 ©2019 IEEE Energy management and speed profile optimization for hybrid electric trams Zhuang Xiao School of Electrical Engineering Southwest Jiaotong University ...
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 …
Compatible energy storage devices that are able to withstand various mechanical deformations, while delivering their intended functions, are required in wearable technologies. This imposes constraints on the structural designs, materials selection, and miniaturization of the cells. To date, extensive efforts
Energy savings in electric rail transport are important in order to increase energy efficiency and reduce its carbon footprint. This can be achieved by storing and using the energy generated during regenerative braking. The system described in this paper consists of a supercapacitor energy storage system (SC ESS), a bidirectional DC/DC …
Hybrid electric trams equip with additional on-board energy storage devices to improve the performance of power sources. Both of optimal energy management and velocity control are important to maximum the energy efficiency for catenary-supercapacitors hybrid trams. An optimal control model has been developed to minimize …
This study presents the recent application of energy storage devices in electrified railways, especially batteries, flywheels, electric double layer capacitors and …
Hybrid electric trams equip with additional on-board energy storage devices to improve the performance of power sources. Both of optimal energy management and velocity control …
PDF | This paper investigates the benefits of using the on-board energy storage devices (OESD) and wayside energy ... the benefits of using a central communication system between trams, cars ...
In this chapter, the supercapacitor-based energy storage system is used to achieve full range of catenary free tram design, and the feasibility of this scheme is checked and verified by the traction calculation. Modern trams use pure electric to drive. Trams are currently new popular railway transportation products. They are convenient and environment friendly, …
3.2 Cycle efficiency Cycle efficiency, also known as round-trip efficiency, is the ratio of the output electrical energy to the input electrical energy as a percentage during a full charge/discharge cycle. Therefore, it is a key indicator of energy efficiency. According to [], the cycle efficiency of ESSes can be classified into three levels: very high efficiency …
Railway, as one of the most energy-efficient transport, plays an essential role in improving the world’s energy and environmental sustainability. Statistics about rail share of transport activities and the corresponding energy consumption will demonstrate the...
Abstract: In order to design a well-performing hybrid storage system for trams, optimization of energy ... The double DC/DC topology can control two kinds of energy storage devices at the same ...
PDF | This paper investigates the benefits of using the on-board energy storage devices (OESD) and wayside energy storage devices (WESD) in light rail... | Find, read and cite all ...
Then the charger makes the storage charged with the constant charging current (I cha ) until the amount of energy used in the previous inter-station section is charged. The charging current can be ...
Energy storage systems (ESSs) can be located outside the vehicle (stationary energy storage) or inside the vehicle (mobile energy storage). Stationary …
Despite low energy and fuel consumption levels in the rail sector, further improvements are being pursued by manufacturers and operators. Their primary efforts aim to reduce traction energy demand, replace diesel, and limit the impact of electrified overhead infrastructures. From a system ‐ level perspective, the integration of alternative energy sources on board …
Energy Storage System Design for Catenary Free Modern Trams Li Wang, Qinghua Zhao, Hongliang Duan and Changqing Liu Abstract Modern trams use pure electric to drive. Trams are currently new popular railway transportation products. They are convenient and
Since 2016, tram vehicles running on the tramway line in Doha, Qatar, have been equipped with Sitras HES devices for catenary …
Contact Us