Status of Superconducting Cable Demonstration Project in Japan

Honjo, S.; Mimura, Tomoo; Kitoh, Y.; Noguchi, Yuichi; Masuda, Takato; Yumura, H.; Watanabe, M.; Ikeuchi, Masamitsu; Yaguchi, Hiroharu; Hara, T.

doi:10.1109/tasc.2010.2092744

Cited by 69 publications

(17 citation statements)

References 4 publications

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“…Conventional copper conductors are typically operated with current densities of around 2 A/mm 2 , resulting in power losses of 40 W/kAm. The MgB 2 wire needs to perform better than that at its operating temperature when including the power required for the cooling system.…”

Section: Jf-08 4 V Mgb 2 Wire Development Requirementsmentioning

confidence: 99%

“…Note that in (2) the full area and the engineering critical current density, J e , are used, whereas in (3) the area of the MgB 2 filaments and the critical current density, J c , are used. By combining (2) and (3) we obtain, …”

Section: Jf-08 4 V Mgb 2 Wire Development Requirementsmentioning

confidence: 99%

“…Nevertheless, several large projects of e.g. power cables [1], [2] and motors [3] have demonstrated the technical feasibility, and a few systems of a high-temperature superconductor based induction heater have been sold on a commercial basis [4]. These devices operate either under DC conditions or at low AC magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

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AC Loss Measurements on Multi-Filamentary $ \hbox{MgB}_{2}$ Wires With Non-Magnetic Sheath Materials

Taxt

Magnusson

Runde

et al. 2013

IEEE Trans. Appl. Supercond.

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Abstract-The MgB 2 superconductor is an attractive choice for many high-current DC applications, particularly for its low cost compared to e.g. YBCO, and the higher operating temperature than the low-temperature superconductors. To extend the operating range to include also AC applications, the AC losses need to be determined and a path towards a low-loss conductor needs to be established and verified. To accomplish this development, systematic and reliable measurements of the losses are essential. In this paper we present AC loss measurement results on non-twisted MgB 2 wires with titanium and coppernickel matrices. 50 Hz AC losses were measured calorimetrically in applied magnetic fields, with transport currents, and with combinations of both. The temperature range was between 25 K and T c , the magnetic field was varied up to 300 mT, and the transport current up to 113 A. The measurement results are used as a basis to discuss the necessary AC loss reduction steps in MgB 2 superconductors. 

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Section: Jf-08 4 V Mgb 2 Wire Development Requirementsmentioning

confidence: 99%

Section: Jf-08 4 V Mgb 2 Wire Development Requirementsmentioning

confidence: 99%

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AC Loss Measurements on Multi-Filamentary $ \hbox{MgB}_{2}$ Wires With Non-Magnetic Sheath Materials

Taxt

Magnusson

Runde

et al. 2013

IEEE Trans. Appl. Supercond.

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“…Since the discovery of a high temperature superconductor [1][2][3], lots of effort has been made to realize the HTS applications [4][5][6][7][8][9][10][11][12][13][14][15]. Among the applications, those using the HTS tape are expected as the promising ones, since the tapes could give a flexible shape for variable performances corresponding to the applications.…”

Section: Introductionmentioning

confidence: 99%

Progress in R＆D of coated conductor in M-PACC project

Izumi¹,

Ibi²,

Nakaoka³

et al. 2014

Progress in Superconductivity and Cryogenics

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The five-year national project in Japan for R&D of coated conductors and applications, named as the Materials and Power Applications of Coated Conductors (M-PACC) project, was finished at the end of FY2013. The project consists of four sub-themes as cable, transformer, SMES and coated conductors. In the theme of coated conductors, the fabrication process had been developed to satisfy the requirements from the applications such as in-field I c performance, low AC loss in the long tapes etc. Through the project, the remarkable progress was achieved as follows; a high in-field minimum I c value over 54A/cm-width under 3T at 77K was realized in a 200m long EuBCO tape with artificial pinning centers of BaHfO 3 by the pulsed laser deposition (PLD) technique on the IBAD template. On the other hand, the AC loss reduction was confirmed in the tapes fabricated by both PLD and the metal organic deposition (MOD) techniques by scribing 100m tapes into 10-filamments. Additionally, the mechanism of the delamination phenomenon was systematically investigated and the strength was improved by eliminating the origins of the weak points in the films. Through the development, all targeted goals were accomplished and the several results were appreciated as a world champion data.

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“…Many research prototypes for power cables [9][10][11], motors [12], fault current limiters [13], SMES (Superconducting Magnetic Energy Storage) [14] and transformers [15] using CC were demonstrated, and the projects for the application of superconducting AC power cables in a real power grid are now in progress in several countries [16,17].…”

Section: Introductionmentioning

confidence: 99%

Progress in research and development for REBCO coated conductors by reactive co-evaporation

Oh¹,

Kim²,

Ha³

et al. 2013

Progress in Superconductivity and Cryogenics

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This paper reviews recent progress in research and development (R&D) of reactive co-evaporation for high performance REBCO coated conductors in Korea. Two types of reactive co-evaporation methods were developed for the deposition of SmBCO and GdBCO superconducting layers respectively on the IBAD (Ion Beam Assisted Deposition)-MgO template in the Korean coated conductor project. Batch type reactive co-evaporation equipment and its processing were developed for SmBCO coated conductors at Korea Electrotechnology Research Institute (KERI) in conjunction with the Korea Advanced Institute of Science and Technology (KAIST), and a very high critical current exceeding 1,000 A/cm at 77 K in the self field was achieved through the optimization of deposition parameters. Reel-to-reel type reactive co-evaporation processing with a high conversion rate was also developed, while long length GdBCO coated conductors have been routinely produced by SuNAM Co. The minimum critical current of 422 A/cm-w at 77 K in self field was confirmed for 1 km-long GdBCO tape.

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Status of Superconducting Cable Demonstration Project in Japan

Cited by 69 publications

References 4 publications

AC Loss Measurements on Multi-Filamentary $ \hbox{MgB}_{2}$ Wires With Non-Magnetic Sheath Materials

AC Loss Measurements on Multi-Filamentary $ \hbox{MgB}_{2}$ Wires With Non-Magnetic Sheath Materials

Progress in R＆D of coated conductor in M-PACC project

Progress in research and development for REBCO coated conductors by reactive co-evaporation

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