Development of (RE)BCO cables for HTS power transmission lines

Mukoyama, S.; Yagi, Masayuki; Masuda, Tomoaki; Amemiya, Naoyuki; Ishiyama, Atsushi; Kashima, N.; Nagaya, S.; Aoki, Yuji; Yoshizumi, M.; Yamada, Yutaka; Izumi, Teruo; Shiohara, Y.

doi:10.1016/j.physc.2009.05.251

Cited by 18 publications

(7 citation statements)

References 9 publications

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“…The figure shows that AC loss was 0.08 W/m at 1 kA under a load factor (I p /I c ) of 0.58. Moreover, it is also clear that in the high load region, the measured loss agrees fairly well with the simulated loss given by two Norris models [5,6].…”

Section: Evaluation Of Ac Losssupporting

confidence: 78%

Development of YBCO power devices in Japan

Fujiwara

Hayashi

Nagàya

et al. 2010

Physica C: Superconductivity and its Applications

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Section: Evaluation Of Ac Losssupporting

confidence: 78%

Development of YBCO power devices in Japan

Fujiwara

Hayashi

Nagàya

et al. 2010

Physica C: Superconductivity and its Applications

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“…Since the discovery of high- T c cuprate superconductors in 1986 by Bednorz and Müller, a significant research effort has been made worldwide to understand the fundamental mechanism for the high- T c -superconductivity and find effective ways to enhance the properties of this kind of material for applications, such as in magnetic bearing, , motors, trapped flux magnets, and power lines. − The YBCO superconductor has become one of the most important and practical high temperature superconductors because of its high T c , the secondary peak effect, high levitation force, and larger critical current density ( J c ) in high magnetic field. The enhancement in these properties can be achieved by the introduction of flux pinning centers and the optimization of fabrication conditions. − Though the top seeded melt textured growth (TSMTG) method is one of the most popular methods for the fabrication of single domain REBCO bulk superconductors with high superconducting properties, there are some disadvantages of the TSMTG method, such as leakage of the Ba–Cu–O liquid phase, shape distortion, and shrinkage.…”

Section: Introductionmentioning

confidence: 99%

Effects of Vertical Temperature Gradient on the Growth Morphology and Properties of Single Domain YBCO Bulks Fabricated by a New Modified TSIG Technique

Guo

Yang

et al. 2015

Crystal Growth & Design

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Single domain YBCO bulk superconductors have been fabricated with different vertical temperature gradients (VTG) by a modified top-seeded infiltration and growth (TSIG) process with a new solid phase (Y 2 O 3 +BaCuO 2 ) and a new liquid phase (Y 2 O 3 +6CuO +10BaCuO 2 ). It is found that the angle α (between the upper surface and interface of a-and c-growth sectors) is very sensitive to the VTG, which means that the growth rate in caxis direction (R c ) can be changed by the VTG, according to tan α = R c /R a ; R a is the growth rate in the a-axis direction. It is also found that the 4-fold growth sectors did not cover the whole surface of the sample grown with a positive VTG, and the volume fraction of the single c-axis growth sector (V fc ) is 37.5% of the sample grown with a zero VTG, but it is reduced to 25% by a positive VTG, and enlarged to 53.6% by a negative VTG. The results of levitation force and trapped field of the samples show that a negative (or positive) VTG can improve (or reduce) levitation force and trapped field of the sample compared with that of the sample grown under a zero VTG. The results provide a very important way to fabricate large-size YBCO bulks with higher V fc and better physical properties.

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“…Fig. 4 shows AC losses and critical currents measured at temperatures of 77.3 K, 74.0 K and 72.0 K. We could reduce AC loss to 0.49 W/m at 3 kA owing to high critical current of 7047 A at 72.0 K and thin width tapes [6]. Uniformity of critical current in the thin tape and improvement of critical current of the tape are essential to reduce the AC loss more.…”

Section: Progress Of 275 Kv Cable Developmentsmentioning

confidence: 95%