Comparison of energy storage configurations in railway microgrids

Yoshida, Yuko; Figueroa, H.; Dougal, Roger A.

doi:10.1109/icdcm.2017.8001034

Cited by 12 publications

(6 citation statements)

References 13 publications

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“…electronic devices, batteries or photovoltaic panels) can be directly connected to the DC bus, reducing the multi AC/DC conversion stages and, thus, avoiding unstable scenarios and mitigating power conversion losses introduced by the frequency and reactive power control. The advantages rendered by DC microgrids have been confirmed in a wide range of industry applications, such as electric vehicles (EVs) [9], electric trains [10], (more-, hybrid-or all-) electric aircrafts [11,12], and electric ships [13]. The benefits of using a DC ship power system have been summarised in [14], as follows:…”

Section: General Topic and Overviewmentioning

confidence: 99%

Advanced Hierarchical Control and Stability Analysis of DC Microgrids

Braitor

2022

Springer Theses

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source is rigorously proven using ultimate boundedness theory. Asymptotic stability to the desired equilibrium for the closed-loop system is analytically guaranteed, and detailed conditions are derived to guide the control design. v In order to validate the effectiveness of the different control methodologies developed in this thesis, both simulation and experimental testing are performed for each one of the methods, and are also compared with the conventional approaches to highlight their superiority. vi xi 5.4 Simulation results of the system states of two parallel operated DC/DC boost converters under the proposed controller . . . . . . . . . . . . . 5.5 Simulation results of the controller states of two parallel operated DC/DC boost converters under the proposed controller . . . . . . . . 5.6 DC microgrid configuration with n paralleled unidirectional DC/DC boost converters feeding a common generic load.

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Section: General Topic and Overviewmentioning

confidence: 99%

Advanced Hierarchical Control and Stability Analysis of DC Microgrids

Braitor

2022

Springer Theses

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“…DC systems are still in use in many railways where the power demand and distance are not critical, but AC systems are preferred for high-speed or heavy haul freight systems. In these cases, energy is transformed and stored in an electric, chemical or kinetic medium [19]. Finally, the change of driver' patterns is considered in some approaches [20], but this method impacts on timetables and depends on train engineers more than in technical questions.…”

Section: Energy Efficiency In Railways: the Use Of Regenerative Brakingmentioning

confidence: 99%

Analysis, Evaluation and Simulation of Railway Diesel-Electric and Hybrid Units as Distributed Energy Resources

García-Garre

Gabaldón

2019

Applied Sciences

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The objective of this paper involves the analysis, identification and evaluation of different possibilities offered by technology for the improvement and the management of the use of energy and hybridization in railways: On board generation, demand response and energy storage, both in traction and auxiliary loads, considering the aggregation of resources and its stochastic nature. The paper takes into account the importance of efficient use of energy in railways, both currently (trains in service, prototypes) and in the future, considering the trends driven by energy policy scenarios (2030–2050) that will affect service and operation of units during their lifetime. A new activity has been considered that will be relevant in the future in the framework of a new electricity supply paradigm: Smart-Grids. According to this paradigm, the interaction of the Electric Power System and the Railway Supply System (somehow embedded in the Power System) will bring new opportunities for the collaboration of these two systems to perform, in a wise economic fashion, a better and more reliable operation of the complete energy system. The paper is focused on a mixed profile with low-medium traffic (passenger and freight): The first part of the route is electrified (3 kV DC catenary) whereas the second part is not electrified. Results justify that complex policies and objectives bring an opportunity to make cost-effective the hybridization of railway units, especially in low/medium traffic lines, which improves their social and economic sustainability.

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“…Another optimization approach, based on the dual speed curve method, is presented in [1], to determine the effective speed curve for maximizing the energy economy. In [10] the authors present a comparison between different storage configurations in regenerative braking systems of locomotives, in railways electrified by a micro DC network connected to the electrical network by a unidirectional substation. The referred work proposes a braking system with a control algorithm that considers the mass variation and the resistances that participate in the breaking, pointing out the off-board system as the more interesting in the considered condition.…”

Section: Introductionmentioning

confidence: 99%

Regenerative Braking for Energy Recovering in Diesel-Electric Freight Trains: A Technical and Economic Evaluation

et al. 2020

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The present work evaluates the application of regenerative braking for energy recovery in diesel-electric freight trains to increase efficiency and to improve decarbonization. The energy from regenerative braking has to be stored onboard when the track is not electrified. Different technologies of energy recovery are presented and discussed. The energy balance of an existing route is presented and simulated for different battery sizes. The analysis is illustrated with experimental data from an important Brazilian railway. Results show that the energy recovery from regenerative brake is a feasible investment and may be recommended to increase the efficiency in transportation and also to improve the low carbon mobility in railway systems.

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Comparison of energy storage configurations in railway microgrids

Cited by 12 publications

References 13 publications

Advanced Hierarchical Control and Stability Analysis of DC Microgrids

Advanced Hierarchical Control and Stability Analysis of DC Microgrids

Analysis, Evaluation and Simulation of Railway Diesel-Electric and Hybrid Units as Distributed Energy Resources

Regenerative Braking for Energy Recovering in Diesel-Electric Freight Trains: A Technical and Economic Evaluation

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