Ac-loss measurement of a DyBCO-Roebel assembled coated conductor cable (RACC)

Schuller, S.; Goldacker, W.; Kling, A.; Krempaský, Ľ.; Schmidt, C.

doi:10.1016/j.physc.2007.01.063

Cited by 31 publications

(30 citation statements)

References 6 publications

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“…The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/10.1088/0953-2048/27/9/093001 obtaining this coupling was demonstrated by using Ag/resin paste, which provides a moderate coupling with tolerable coupling AC losses [23]. Since the impregnated cable becomes quite stiff and is not suitable for strong bending, this option is however limited for application "in situ" where no further strong bending of the sample occurs.…”

Section: Strand Couplingmentioning

confidence: 99%

Roebel cables from REBCO coated conductors: a one-century-old concept for the superconductivity of the future

Goldacker

Grilli

Pardo

et al. 2014

Supercond. Sci. Technol.

266

139

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Energy applications employing high-temperature superconductors (HTS), such as motors/generators, transformers, transmission lines and fault current limiters, are usually operated in the alternate current (AC) regime. In order to be efficient, the HTS devices need to have a sufficiently low value of AC loss, in addition to the necessary current-carrying capacity. Most applications are operated with currents beyond the current capacity of single conductors and consequently require cabled conductor solutions with much higher current carrying capacity, from a few kA to up to 20-30 kA for large hydro-generators.A century ago, in 1914, Ludwig Roebel invented a low-loss cable design for copper cables, which was successively named after him. The main idea behind Roebel cables is to separate the current in different strands and to provide a full transposition of the strands along the cable direction. Nowadays, these cables are commonly used in the stator of large generators. Based on the same design concept of their conventional material counterparts, HTS Roebel cables from REBCO coated conductors were first manufactured at the Karlsruhe Institute of Technology (KIT) and have been successively developed in a number of varieties that provide all the required technical features such as fully transposed strands, high transport currents and low AC losses, yet retaining enough flexibility for a specific cable design. In the past few years a large number of scientific papers have been published on the concept, manufacturing and characterization of such cables. Times are therefore mature for a review of those results. The goal is to provide an overview and a succinct and easy-to-consult guide for users, developers, and manufacturers of this kind of HTS cables.

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Section: Strand Couplingmentioning

confidence: 99%

Roebel cables from REBCO coated conductors: a one-century-old concept for the superconductivity of the future

Goldacker

Grilli

Pardo

et al. 2014

Supercond. Sci. Technol.

266

139

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“…For future longer cables a well-defi ned moderate strand connection to allow current redistribution without too strong enhancement of coupling losses has to be considered (Schuller et al , 2007). Due to the insulating buffer layers in the coated conductor tapes the current fl ow from the substrate side into the superconducting layer is only possible via a conducting layer that electrically connects the substrate side to the superconducting layer (e.g.…”

Section: © Woodhead Publishing Limited 2012mentioning

confidence: 99%

High temperature superconductor (HTS) cables

Schlachter

Goldacker

2012

High Temperature Superconductors (HTS) for Energy Applications

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“…To reduce the magnetization loss of thin plate as YBCO coated conductor, the striation and the transposition can be adopted instead of multifilament and twist, respectively [7]. Also, we can obtain the effects of transposition and stack by manufacturing as continuously transposed geometry [8], [9].…”

Section: Reduction Effect On Magnetization Loss In the Stacked Conducmentioning

confidence: 99%

Reduction Effect on Magnetization Loss in the Stacked Conductor With Striated and Transposed YBCC Coated Conductor

Lee

Byun

Han

et al. 2009

IEEE Trans. Appl. Supercond.

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Recently, it is proposed to make striations on the YBCO coated conductor and to transpose each other as one of the solutions to decrease the perpendicular magnetization loss. For large power application using HTS, the stacked conductor packing the YBCO coated conductors should be used because the current carrying capacity of a single conductor is limited. The stacked conductor has different AC loss characteristics from single conductor because the screening currents in the adjacent conductors affect the local magnetic field at the position of each conductor in the stacked conductors. In this paper, we research the effect by the stack, striation and transposition on magnetization loss of YBCO coated conductors in perpendicular magnetic field. To estimate the reduction effects of perpendicular magnetization loss, several short samples as the stacked conductor with striation and transposition are prepared and tested. We compare the measured results of the conductors with that of the single YBCO coated conductor to estimate the reduction effects.

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Ac-loss measurement of a DyBCO-Roebel assembled coated conductor cable (RACC)

Cited by 31 publications

References 6 publications

Roebel cables from REBCO coated conductors: a one-century-old concept for the superconductivity of the future

Roebel cables from REBCO coated conductors: a one-century-old concept for the superconductivity of the future

High temperature superconductor (HTS) cables

Reduction Effect on Magnetization Loss in the Stacked Conductor With Striated and Transposed YBCC Coated Conductor

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