Research and development of super-conductive cable and AC power equipment

Ueda, K.; Ozawa, Yasuo; Wachi, Y.; Kikuchi, A.; Nakatsuka, T.; Iwadate, K.

doi:10.1016/s0921-4534(02)01740-9

Cited by 13 publications

(4 citation statements)

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“…This reduction leads to improvement of voltage and synchronous stability of power system. With these backgrounds, a national project on the R&D of HTS cable was started to realize high current capacity, low AC losses and long length cooling system [2], [3].…”

Section: R and D Of Superconductive Cable In Japan I Introductionmentioning

confidence: 99%

R & D of Superconductive Cable in Japan

Kimura¹,

Yasuda²

2005

IEEE Trans. Appl. Supercond.

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Super-ACE (Superconducting AC Equipments) project was started in 2000 fiscal year as a national project to research and develop superconducting AC power equipment. This project goal to develop basic technologies for high temperature superconducting (HTS) cable, HTS fault current limiter (FCL), HTS magnet for reactor and transformer. Main subjects of the cable study are development of: HTS conductor having 3 kA rated current with 1 W/m AC loss, cooling technologies for a 500 m HTS cable with 1 kA rated current, and analytical study of integrated HTS power system. This paper describes major results of studies on the HTS superconductors, and outline and some results of verification test of 500 m cable.

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Section: R and D Of Superconductive Cable In Japan I Introductionmentioning

confidence: 99%

R & D of Superconductive Cable in Japan

Kimura¹,

Yasuda²

2005

IEEE Trans. Appl. Supercond.

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“…H IGH-TEMPERATURE superconductors have been developed and have been applied to various kinds of superconducting fault current limiters (SFCL's) [1]. Some SFCL's include reactors or magnets wound with Bi2223 superconducting wire.…”

Section: Introductionmentioning

confidence: 99%

Thermal Runaway and Resistive Properties of a Bi2223 Pancake Coil Subjected to Overcurrent

Tanaka

Furuse

Arai

et al. 2005

IEEE Trans. Appl. Supercond.

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Various kinds of superconductivity-based fault current limiters (FCL's) have been studied. One type uses a superconductive reactor or magnet that loses its superconductive properties when subjected to excessive current flow. We examined the characteristics of a Bi2223 double pancake coil subjected to overcurrent. DC or AC overcurrent was passed through the coil cooled by saturated liquid nitrogen, and the resultant temperature difference was measured between the coil surface and the saturated liquid nitrogen. We then theoretically and experimentally investigated the starting conditions of the resultant thermal runaway. Our results confirmed that these conditions are decided by the product of critical heat flux and cooling area, and that the angle of the coil is important if the cooling channels are narrow.

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“…Superconducting fault-current limiters (FCL) have been widely developed as one of the promising applications of high-T c superconductors (HTS). Resistive-type FCLs that use the instantaneous transition from super-to normal conduction due to fault currents are extensively investigated, for example, in a national project of Japan, 'Research and development of fundamental technologies for superconducting AC power equipment (Super-ACE)' [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…Superconducting films having a high critical density (J c ) are necessary to form on large-area substrates for the fabrication of resistive-type FCL elements. The target size of the substrates is 30 × 10 cm 2 in the Super-ACE project [1]. Sapphire is the most suitable substrate material, because its high thermal conductivity prevents mechanical breakage due to large thermal stresses upon quenching [2].…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional large-size Y Ba₂Cu₃O₇films (30 × 10 cm²) on CeO₂-buffered sapphire by a coating pyrolysis process

Manabe¹,

Sohma²,

Yamaguchi³

et al. 2004

Supercond. Sci. Technol.

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Large-size, two-dimensional Y Ba2Cu3O7 (YBCO) films were successfully prepared by a chemical solution-based coating pyrolysis (CP) process on 30 × 10 cm2 R-plane sapphire substrates with a vacuum-deposited CeO2 buffer layer. The CeO2 layer was very smooth and uniform with an average roughness (Ra) of 0.48 nm by atomic force microscopic observations and highly (001)-oriented by large-area x-ray diffraction θ–2θ scans. The c-axis-oriented YBCO films were prepared by a CP process using a fluorine-free, metal acetylacetonate-based coating solution. A 30 × 10 cm2-rectangular c-axis-oriented YBCO film annealed in a large-diameter tube furnace demonstrated high inductive-Jc values, for which the distribution was fairly uniform, with an average 1.0 MA cm−2 at 77 K.

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Research and development of super-conductive cable and AC power equipment

Cited by 13 publications

References 1 publication

R & D of Superconductive Cable in Japan

R & D of Superconductive Cable in Japan

Thermal Runaway and Resistive Properties of a Bi2223 Pancake Coil Subjected to Overcurrent

Two-dimensional large-size Y Ba₂Cu₃O₇films (30 × 10 cm²) on CeO₂-buffered sapphire by a coating pyrolysis process

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Research and development of super-conductive cable and AC power equipment

Cited by 13 publications

References 1 publication

R &amp; D of Superconductive Cable in Japan

R &amp; D of Superconductive Cable in Japan

Thermal Runaway and Resistive Properties of a Bi2223 Pancake Coil Subjected to Overcurrent

Two-dimensional large-size Y Ba2Cu3O7films (30 × 10 cm2) on CeO2-buffered sapphire by a coating pyrolysis process

Contact Info

Product

Resources

About

R & D of Superconductive Cable in Japan

R & D of Superconductive Cable in Japan

Two-dimensional large-size Y Ba₂Cu₃O₇films (30 × 10 cm²) on CeO₂-buffered sapphire by a coating pyrolysis process