Battery electric multiple units to replace diesel commuter trains serving short and idle routes

Mwambeleko, Joachim J.; Kulworawanichpong, Thanatchai

doi:10.1016/j.est.2017.01.004

Cited by 26 publications

(18 citation statements)

References 9 publications

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“…The use of energy storage systems in the railway sector has some references, mostly in order to avoid the waste of energy during braking or to reduce the use of infrastructure. It is quite common to find light trains and trams with energy storage systems on board [16], more efficient than stationary solutions. However, the use of stationary energy storage devices is more convenient from the economic point of view, as well as to reduce the maximum power requirements to the grid [17].…”

Section: Power Supply Through An Intermedium Energy Storage Systemmentioning

confidence: 99%

Power Supply Solution for Ultrahigh Speed Hyperloop Trains

et al. 2020

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The paper analyses the alternatives for the power supply of a Hyperloop type railway transport. The particular case of the technology of the Spanish company ZELEROS was studied. Based on previous technical specifications related to both the first prototype and a commercial system, different options were analyzed. We selected the use of a linear motor driven by a single power electronic converter, a distribution scheme comprising different sections along the acceleration area of the track, and an energy storage system based on supercapacitors for the energy supply. The power/energy ratio and the cycle capability are the reasons to become a feasible and competitive solution. A preliminary design methodology for the energy storage requirements is presented in the paper. Once the type of linear motor was selected, the power supply scheme was presented, based on a motor-side power electronic converter and a DC/DC converter which connects to the energy storage devices. An additional low power grid-tie converter for the recharge of the energy storage system was also used. Different track sections were defined, connected to the power electronic converter through corresponding switches, being supplied sequentially when the capsule presence is detected along the track. The particular characteristics of this application, with relatively short traction track area, as well as the high energy recuperation ratio due to the low losses, make more suitable the use of energy storage systems as the source of power supply than the direct connection to the grid.

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Section: Power Supply Through An Intermedium Energy Storage Systemmentioning

confidence: 99%

Power Supply Solution for Ultrahigh Speed Hyperloop Trains

et al. 2020

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“…Under such circumstances, light rail vehicles with on‐board energy storage bring one of the alternatives that some railway operators have been opting for, even during the age of lead acid battery. Strikingly, Deutsche Bahn (DB) railway operator successfully operated lead acid battery powered trains class ETA 150 (later 515) from 1955 to 1995 [13, 15]. With on‐board energy storage, regenerative braking energy that would otherwise be dissipated as heat if a line is non‐receptive and there is no other tram in vicinity that demands power, is stored and reused (Fig.…”

Section: Introductionmentioning

confidence: 99%

Enhancing conventional battery and contact line hybrid tram system with accelerating contact lines

Mwambeleko

Hayasaka

Kulworawanichpong

2020

IET Electrical Systems in Transportation

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Urban passenger mobility challenges can be sustainably eased with electric trains. However, due to the visual impact, safety and, electrification cost concerns, some routes or section(s) of a route are not electrified. In such cases, battery powered trams present a promising alternative. Rail vehicles are heavy but, they have a low coefficient of rolling friction. Consequently, they draw high power during acceleration as compared to the power demand during cruising. Thus, a high capacity high-voltage traction battery is required to provide accelerating power. To minimise total electrified distance and traction battery size, a battery and accelerating-contact line (BACL) hybrid tram system in which a tram accelerates from a station drawing power from a short contact line and cruises with traction battery is presented. Simulated in MATLAB, the BACL hybrid tram system with 1.8 km total electrified distance has equivalent performance to the conventional battery and contact line hybrid tram system with 12.2 km total electrified distance. Compared to independently battery powered tram, battery size is reduced by 62.5%. Suggested applications for the BACL tram system are on short, fairly flat, idle lines with few stops.

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“…Moreover, improvements in the railway industry can be found in various aspects, aiming to provide a positive impact and improvements in global railway operation efficiency; for example, many researchers have focused on combustion systems changing from diesel to electric operated trains (Oanh et al, 2010;Mwambeleko and Kulworawanichpong, 2017;Khan and Gillies, 2019). Chan's and research 2019 mentioned that the substitution of electric systems on rail networks could reduce GHG emissions (including CO 2 ) up to 27,000 tons per year or a decrease of 98% from the current operation on the rail network (Chan et al, 2013).…”

Section: Introductionmentioning

confidence: 99%