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High-speed rail is defined as rail services over long distances between stations, operating at a maximum speed above 250 kph. Metro rail refers to high-frequency, high capacity urban services which are fully separated from traffic, often underground or elevated and light rail to tramways and other lower capacity, lower
Reference [] proposes an optimal approach for energy and economic savings of railway system and energy storage systems, and it is analyzed for a Spanish high-speed railway system. An economic model to simulate optimal operation of a grid-connected microgrid (MG) considering wind farms and an innovative technology of
The flywheel energy storage (FES) system based on modern power electronics has two modes of energy storage and energy release. When the external system needs energy, the flywheel acts as the prime mover to drive the flywheel motor to generate electricity, and the flywheel kinetic energy is transmitted to the load in the form
Mobile Charging Facilities. Priority Lane. The Lounge. Toilets / Babycare Rooms. Water Dispensers. Automated External Defibrillators (AED) Smoking Room. Lost Property Office. Self-service Taxi Ticket.
In China, the first flywheel energy storage device developed by Dunshi magnetic energy technology Co., Ltd. has passed the test and certification of Chinese Railway Product Quality Supervision and Testing Center, but it is also only suitable for DC750V urban rail.
Railways are more energy-efficient than other modes of passenger transportation, with CO2 emissions per ton-kilometer roughly one-seventh those of passenger cars. This is due to the energy-saving effects of power electronics, the electronics technology garnering the most attention amid calls to reduce CO2 emissions
Abstract. Advanced Rail Energy Storage (ARES) has developed a breakthrough gravity-based technology that will permit the global electric grid to move effectively, reliably, and cleanly assimilate renewable energy and provide significant stability to the grid. ARES stores energy by raising the elevation of mass against the force of
Considering both dwelling at stations and running in the inter-station sections, the paper proposes an integrated optimization model for reducing net energy consumption from
The objective of this research was to optimize the number of locations of the energy storage devices and speed profiles. First, kinematic equations were applied to simulate energy consumption. Then, a genetic algorithm (GA) was developed to optimize the speed profiles that minimize the energy consumption with and without a wayside
Countries all over the world are developing high-speed railway transportation, which is an essential mode of transportation in modern society [2]. Railway networks have covered large areas [3] . However, the environmental costs cannot be ignored, especially the noise pollution, such as aerodynamic noise and rolling noise
With the rapid development of rail transit from high-speed heavy-load toward green intelligent transformation and energy storage technology, energy storage
High-speed rail locomotive regenerative braking energy is fed back to the grid, which will cause system instability. To solve this problem and make full use of regenerative braking energy, this paper proposes to use an energy storage system to absorb regenerative
Between 2005 and 2016, high-speed rail tracks increased by 187% in Europe, while China has built two thirds of the global high-speed lines after starting with virtually none. In the last decade, metro and light rail lines grew by 3.5% per year.
Electrified railways are becoming a popular transport medium and these consume a large amount of electrical energy. Environmental concerns demand reduction in energy use and peak power demand of railway systems. Furthermore, high transmission losses in DC railway systems make local storage of energy an increasingly attractive
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
Thousand km. China Europe Japan Middle East Korea United States India Africa (< 1 thousand km) 0 5 10 15 20 25 30 35 40 45 50. IEA. Licence: CC BY 4.0. In operation. Under construction. Appears in. Sustainable Recovery. High-speed rail networks around the world, 2020 - Chart and data by the International Energy Agency.
The energy-saving effect of high-speed rail network is stronger with increased density of high-speed railway network in the region. In 2010, China''s HSR mileage ranked first in the world (4245 km), and in 2021, it was 40,941 km, accounting for 58.23 % of the
Based on the above analysis, the following research hypotheses are proposed: Hypothesis 1: The initiation of HSR is conducive to the opti-mization of energy consumption structure. Hypothesis 2
Say the grid temporarily has more renewable energy than it needs — the wind is blowing, the sun is shining, and there''s not enough demand to make use of it. Advanced rail energy storage (thus
Traction power fluctuations have economic and environmental effects on high-speed railway system (HSRS). The combination of energy storage system (ESS)
This paper first examines the energy consumption sources and energy-saving measures of high-speed trains (HSTs). Then presents the EETO in HSRs, including three categories:
Low-carbon target and railway energy transition in China. With climate change becoming a common security challenge for humanity, carbon reduction has
Storage is an increasingly important component of electricity grids and will play a critical role in maintaining reliability. Here the authors explore the potential role that rail-based mobile
high-speed railway station is performed. The highest benefit is achieved when the regen-erative braking energy is partially recovered by the HESS, which can save 3% of the total cost per day and pay back the cost in eight years. 1 INTRODUCTION 1.1
This paper first examines the energy consumption sources and energy-saving measures of high-speed trains (HSTs). Then presents the EETO in HSRs, including three categories: energy-efficient train control, energy-efficient train timetabling, and EETO considering train timetabling and driving strategy.
Taking a high-speed railway station in China as an example, this paper analyses the energy storage configuration of high-speed railway power supply system. The traction load curve of high
The hybrid energy storage system (HESS) is composed of different energy storage media with high power density and high energy density, such as
As shown in Fig. 1, the HESS consists of a high-power energy storage subsystem (PESS) and a high-capacity energy storage subsystem (CESS). The PESS is mainly responsible for the interaction of short-term high-power energy, while the CESS is responsible for the interaction of long-term low-power energy and undertakes the main
A FESS converts electrical energy to kinetic energy and stores the mechanical energy in a high-speed rotor, which is connected to an electrical machine via
Then, a genetic algorithm (GA) was developed to optimize the speed profiles that minimize the energy consumption with and without a wayside energy storage unit (WESS) for a rail transit line. Finally, a model was developed to optimize
To solve the negative sequence (NS) problem and enhance the regenerative braking energy (RBE) utilisation in an electrified railway, a novel energy storage traction power supply system
Optimal speed profile and energy-optimal speed profile are shown in Figure 5b. The trip time of energy-optimal solution is 2169.05 s, which is 1.19% higher than the trip time of optimal solution. From the battery power profile in Figure 5c, it can be seen that the optimal solution make full use of the ability of the battery system to drive the train
Abstract. Using the difference-in-differences method combined with the propensity score matching, this study identifies the causal relationship between high-speed rail (HSR) and energy productivity in China. Furthermore, we investigate the mechanism through which HSR affects energy productivity, as well as the heterogeneity of the
In this paper, a medium-size high speed railway station in South China is taken as an example to study the HVAC load characteristics for such buildings. Based on measured data and relevant information, and with the help of simulation tool DeST, cooling and heating load of the station are calculated and broken down into several major parts,
Optimization research on hybrid energy storage system of high‐speed railway. View Fulltext. Author (s): Kai Qu 1 and Jiaxin Yuan 1. View affiliations. Source: Volume 15, Issue 20, October 2021, p. 2835 – 2846. DOI: 10.1049/gtd2.12217, Print ISSN 1751-8687, Online ISSN 1751-8695.
The energy use and environmental emissions of high-speed rail transportation in China: a bottom-up modeling. Energy 182, 1193–1201 (2019). Google Scholar
Energy Storage + Energy Feed Access: an energy storage access scheme based on energy feed system, whose topology is shown in Fig. 11. Including single-phase transformer, single-phase rectifier, intermediate DC link, three-phase inverter and three-phase transformer, the energy storage devices connect the intermediate DC link.
Her research interests include high-speed railway traction power supply system, storage and utilization of regenerative braking energy and non-stop power supply system. Hang Zhou was born in Wuxue, China in 1994.
Between 2005 and 2016, high-speed rail tracks increased by 187% in Europe, while China has built two thirds of the global high-speed lines after starting with virtually none. In the last decade, metro
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