Design and Development of Superconducting DC Cable for Railway Applications

Tomita, Masaru; Muralidhar, M.; Fukumoto, Yusuke; Ishihara, Atsushi; Suzuki, Kenji; Kobayashi, Yusuke; Akasaka, Tomoyuki

doi:10.1109/tasc.2013.2251742

Cited by 14 publications

(2 citation statements)

References 15 publications

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“…HTS technology is particularly beneficial to low voltage and high current applications such as electric aircraft. Low voltage HTS cables in power distribution systems for train networks eliminate the need for multiple substations because the voltage drop in HTS cables is significantly smaller compared to the conventional technology [3]. One of the focus areas in the superconducting power applications research at Florida State University's Center for Advanced Power Systems (FSU-CAPS) and at Georgia Tech's Plasma and Dielectrics Laboratory is the development of novel dielectric insulation materials and designs.…”

Section: Introductionmentioning

confidence: 99%

High‐Temperature Superconducting Cable Design Based on Individual Insulated Conductors

Cheetham

Viquez

Kim

et al. 2018

Advances in Materials Science and Engineering

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The idea of insulating individual high-temperature superconducting (HTS) tapes was explored as a dielectric design to reduce the risk and complexity of HTS cable manufacturing. Applying insulation on individual HTS tapes is amenable to continuous manufacturing processes and opens up material choices for the insulation. In this study, heat shrink insulation was selected as the material choice for exploring the possibility of this design philosophy because of its commercial availability in multiple thicknesses. A systematic set of selection criteria was developed for the selection of appropriate heat shrink for given HTS tape dimensions. The cryogenic dielectric characteristics of insulated HTS tapes were evaluated both in liquid nitrogen and gaseous helium environments at 77 K. Dielectric characteristics of tapes with a single layer of thicker insulation were compared with those insulated using multiple layers of thinner insulation to evaluate the relative merits of each method. Several model power cables were fabricated using the PET insulated tapes, and their dielectric behavior was evaluated at 77 K in gaseous helium environment. The results suggest that the explored method is useful for HTS power cables operating at low voltages (<1,000 V) primarily due to the limitation on achieving thick insulation with high quality using heat shrink tubing. The suitable processes of insulating longer lengths of samples with additional dielectric benefits are discussed.

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Section: Introductionmentioning

confidence: 99%

High‐Temperature Superconducting Cable Design Based on Individual Insulated Conductors

Cheetham

Viquez

Kim

et al. 2018

Advances in Materials Science and Engineering

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“…However, it involves huge cost to build a totally new feeding system. Another method is the use of a superconducting cable as the feeding cable [3,4]. However, superconducting cable is also expensive and requires auxiliary power to keep the temperature of the cable below the critical temperature.…”

Section: Introductionmentioning

confidence: 99%

Implementation method of loss observer to power controller for overhead line and supercapacitor hybrid electric railway vehicle

Saito

Kondo

2016

IEEJ Transactions Elec Engng

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In order to absorb the regenerative power and to reduce the peak input power of a train-in other words, to smooth the input power of the train-in this paper we repot a frequency-domain-based power controlling strategy for energy storage of hybrid electric railway vehicles. Applying a loss-compensating method by using a disturbance observer improves the energy while keeping ability of this controller. However, that loss compensating method requires precise voltage-energy characteristics of the supercapacitor (SC) to estimate the correct loss. Hence, nonlinearity of the capacitance of the SC becomes a problem because it causes an error in the estimated loss. Therefore, this paper presents a method to measure the voltage-energy characteristics precisely of the SC that has a voltage dependence on the capacitance. A method to implement those characteristics into controllers is also proposed. The loss compensating method is applied to a controller by using the proposed method, and its effectiveness is verified by a small-scale experimental system.

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Design and Performance Tests of a 10 kV/4.5 kA Bipolar High-Temperature Superconducting Cable

Cai¹,

Gong²,

Niu³

et al. 2023

Lecture Notes in Electrical Engineering

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Design and Development of Superconducting DC Cable for Railway Applications

Cited by 14 publications

References 15 publications

High‐Temperature Superconducting Cable Design Based on Individual Insulated Conductors

High‐Temperature Superconducting Cable Design Based on Individual Insulated Conductors

Implementation method of loss observer to power controller for overhead line and supercapacitor hybrid electric railway vehicle

Design and Performance Tests of a 10 kV/4.5 kA Bipolar High-Temperature Superconducting Cable

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