Development of 10 kA high temperature superconducting power cable for railway systems

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

doi:10.1063/1.3696975

Cited by 25 publications

(14 citation statements)

References 11 publications

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“…Thermal analysis model of a superconducting cable Fig. 1 shows the thermal analysis model of a superconducting cable which is based on the cable developed at Railway Technical Research Institute [9]. The cable model has a diameter of 139 mm.…”

Section: 1mentioning

confidence: 99%

“…3 shows a superconducting cable model with electric circuit. As is the case with thermal analysis model, a superconducting cable model for circuit analysis is based on the cable developed at Railway Technical Research Institute [9]. The critical current at 77 K is 10 kA and a power law is used as I-V characteristics of superconductors, represented by the following equation:…”

Section: 1mentioning

confidence: 99%

“…6 shows the waveforms of fault currents flowing through HTS layers of SC4. According to the result of the test on DI-BSCCO Type HT (CA50) tapes [9], the current up to 3I c for 100 ms doesn't lead to the degradation of I c . Therefore it is predictable that the superconducting cable is safe for 100 ms.…”

Section: Operational Conditionsmentioning

confidence: 99%

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Feasibility study of superconducting power cables for DC electric railway feeding systems in view of thermal condition at short circuit accident

2016

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A superconducting power cable has merits of a high power transmission capacity, transmission losses reduction, a compactness, etc., therefore, we have been studying the feasibility of applying superconducting power cables to DC electric railway feeding systems.However, a superconducting power cable is required to be cooled down and kept at a very low temperature, so it is important to reveal its thermal and cooling characteristics. In this study, electric circuit analysis models of the system and thermal analysis models of superconducting cables were constructed and the system behaviors were simulated. We analyzed the heat generation by a short circuit accident and transient temperature distribution of the cable to estimate the value of temperature rise and the time required from the accident.From these results, we discussed a feasibility of superconducting cables for DC electric © 2016. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/ railway feeding systems. The results showed that the short circuit accident had little impact on the thermal condition of a superconducting cable in the installed system.

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Section: 1mentioning

confidence: 99%

Section: 1mentioning

confidence: 99%

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Feasibility study of superconducting power cables for DC electric railway feeding systems in view of thermal condition at short circuit accident

2016

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“…The 5 m long high-T c superconducting cable was made of first generation (1G) Bi-2223 HTS tape. The specifications of the cable are reported elsewhere [16]. Figure 2 shows the structure of the superconducting cable.…”

Section: Design Of the Cable Corementioning

confidence: 99%

“…Figure 2 shows the structure of the superconducting cable. We chose the counter-flow-cooled cable design [16,17], since it offers distinct advantages over designs with separate return lines. It saves space and costs since only one line is required.…”

Section: Design Of the Cable Corementioning

confidence: 99%

Design and construction of a high temperature superconducting power cable cryostat for use in railway system applications

Tomita¹,

Muralidhar²,

Suzuki³

et al. 2013

Supercond. Sci. Technol.

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The primary objective of the current effort was to design and test a cryostat using a prototype five-meter long high temperature Bi 2 Sr 2 Ca 2 Cu 3 O y (Bi-2223) superconducting dc power cable for railway systems. To satisfy the safety regulations of the Govt of Japan a mill sheet covered by super-insulation was used inside the walls of the cryostat. The thicknesses of various walls in the cryostat were obtained from a numerical analysis. A non-destructive inspection was utilized to find leaks under vacuum or pressure. The cryostat target temperature range was around 50 K, which is well below liquid nitrogen temperature, the operating temperature of the superconducting cable. The qualification testing was carried out from 77 down to 66 K. When using only the inner sheet wire, the maximum current at 77.3 K was 10 kA. The critical current (I c ) value increased with decreasing temperature and reached 11.79 kA at 73.7 K. This is the largest dc current reported in a Bi 2 Sr 2 Ca 2 Cu 3 O y or YBa 2 Cu 3 O y (Y-123) superconducting prototype cable so far. These results verify that the developed DC superconducting cable is reliable and fulfils all the requirements necessary for successful use in various power applications including railway systems. The key issues for the design of a reliable cryogenic system for superconducting power cables for railway systems are discussed.

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Role of Superconducting Materials in the Endeavor to Stop Climate Change and Reach Sustainable Development

Muralidhar¹,

Arvapalli²,

Pinmangkorn³

et al. 2023

J Supercond Nov Magn

Self Cite

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Progress in the mass production of newly developed bulk (Gd0.33Y0.13Er0.53)Ba2Cu3Oy “(Gd,Y,Er)123” and MgB2 systems is presented. Two batches of (Gd,Y,Er)123 pellets of 20 mm diameter and 7 mm thick were prepared in air by an infiltration growth “IG” process. Trapped field distribution profiles of fully grown bulk samples clearly showed that all samples were single-grain and the trapped field values were more than 0.5 T at 77 K, 1.3 mm above top surface. The best bulk exhibited the trapped field value of 0.63 T at 77 K. Ultra-sonication technique was employed for refining precursors of both (Gd,Y,Er)211 and boron. TEM studies revealed that boron powder subjected to ultrasonication was refined up to nanoscale. The micron-sized particles were reduced to nanoscale, which led to improvement of critical current by up to 36% in bulk MgB2 at 20 K and self-field. This progress in fabrication of high-performance LREBa2Cu3Oy and MgB2 superconducting bulks further promotes commercialization of superconductors’ production as a mode of sustainable technology.

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Development of 10 kA high temperature superconducting power cable for railway systems

Cited by 25 publications

References 11 publications

Feasibility study of superconducting power cables for DC electric railway feeding systems in view of thermal condition at short circuit accident

Feasibility study of superconducting power cables for DC electric railway feeding systems in view of thermal condition at short circuit accident

Design and construction of a high temperature superconducting power cable cryostat for use in railway system applications

Role of Superconducting Materials in the Endeavor to Stop Climate Change and Reach Sustainable Development

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