Design and Evaluation of 66 kV-class “3-in-One” HTS Cable Using REBCO Wires

Ohya, M.; Hirota, H.; Masuda, Takato; Amemiya, Naoyuki; Ishiyama, Atsushi; Ohkuma, Takeshi

doi:10.1016/j.phpro.2012.06.139

Cited by 6 publications

(1 citation statement)

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“…The AC loss in REBCO tapes of a HTS power cable subjected to a parallel magnetic field is extremely small because of the thin-film structure of the REBCO superconducting layer [4]. It is reported that AC loss of a HTS cable using REBCO tapes was achieved 1.83 W/m at 5 kA at 63.8 K [5]. However, the higher operating temperature are expected to realize for HTS cable systems, because 63.8 K operation is difficult to maintain the temperature of liquid nitrogen in the cable system.…”

Section: Introductionmentioning

confidence: 99%

Development of a 66 kV-5 kArms Class HTS Power Cable Using REBCO Tapes With High Critical Current

Daibo

Watanabe

Akashi

et al. 2015

IEEE Trans. Appl. Supercond.

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High temperature superconducting (HTS) cables are able to achieve large power capacity and low-loss power transmission. Fujikura Ltd. worked on developing a 66 kV-5 kArms HTS power cable using high critical current (I c ) REBCO tapes in the Japanese national project. One of the technical targets in this project was to reduce AC loss to less than 2 W/m at 5 kArms. REBCO tapes with 240 A/4 mm-width of I c at 77 K, self field, which were fabricated by ion-beam-assisted-deposition (IBAD) and pulsed laser deposition (PLD) methods, were applied to the HTS power cable. As a result, we succeeded in developing the 20 m-long 66 kV-5 kArms HTS power cable. The measured AC loss was achieved 1.4 W/m at 77 K and 1.0 W/m at 67 K at 5 kArms. On the other hand, it is considered that the eddy current loss of the stainless-steel cryostat pipe of HTS cable become obvious in the case of the single-core cable with the large current capacity. It is suggested that the eddy current loss of the stainless-steel cryostat pipe is due to the internal magnetic flux. Therefore, the eddy current loss of the stainless-steel cryostat pipe as well as uniform current distribution of HTS conductor and shield layer should be taken into account for designing the winding direction and pitch of HTS conductor and shield layer of HTS cable. In this work, the measured eddy current loss of the stainless-steel cryostat pipe is also compared with the calculated one.Index Terms-Eddy current, high temperature superconductor (HTS), power cable, REBCO.

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Section: Introductionmentioning

confidence: 99%