Second-Generation HTS Conductor Design and Engineering for Electrical Power Applications

Xie, Yiyuan; Marchevsky, M.; Zhang, Xun; Lenseth, K.; Chen, Yimin; Xiong, Xuming; Qiao, Yunfei; Rar, A.; Gogia, Balvinder; Schmidt, Robert M.; Knoll, A.; Selvamanickam, V.; Pethuraja, Gopal G.; Dutta, P.S.

doi:10.1109/tasc.2009.2018499

Cited by 26 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this case, it is still desirable to reduce the AC losses because they limit the ramp rate and generate significant hysteresis losses, especially for liquid helium cooled magnets. Roebel cables [3][4][5][6][7] reduce the AC losses caused by both components of an external magnetic field [4,5,8]. In spite of the progress in Roebel cables, many aspects of their AC losses remain unknown [2].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulations of the angular dependence of magnetization AC losses: coated conductors, Roebel cables and double pancake coils

Pardo

Grilli

2011

Supercond. Sci. Technol.

View full text Add to dashboard Cite

The AC loss in ReBCO coated conductors is large in situations when the conductors are subjected to a considerable magnetic field, like in rotating machines, transformers and high-field magnets. Roebel cables can reduce the AC loss in these cases. However, computer simulations are needed to interpret the experiments, understand the loss mechanisms, reduce the AC loss by optimising the Roebel cable and design the cryogenic system. In this article, we simulate and discuss the AC loss due to an applied magnetic field making an arbitrary angle with the cable and taking into account a realistic anisotropic field dependence of the critical current density. We study the AC loss in the superconductor parts for the limits of very high coupling currents and completely uncoupled strands. The simulations for the uncoupled case also describe a double pancake coil with no transport current. For the simulations, we use two different numerical methods with complementary strengths. This serves as a mutual check of the correctness of the simulation results, which agree to each other. Opposite than expected, we found that the AC loss does not only depend on the perpendicular component of the applied magnetic field. We also found that the AC loss for applied fields with an orientation below 7 degrees with the strands surface is reduced more than one order of magnitude comparing to an untransposed cable. Therefore, we recommend to use Roebel cables for windings with important parallel components of the magnetic field, such as transformers and high-field magnets.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical simulations of the angular dependence of magnetization AC losses: coated conductors, Roebel cables and double pancake coils

Pardo

Grilli

2011

Supercond. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Second generation (2G) high temperature superconducting (HTS) wire has moved out of the laboratory and is now being produced in the quantity and with the performance required for large-scale commercial cable and coil demonstrations [1][2][3][4][5][6][7][8][9]. Two major advantages of the 2G technology over the first generation (1G) HTS wire are the potential for lower cost and the ability to tailor wire dimensions and for specific applications.…”

Section: Introductionmentioning

confidence: 99%

Advances in second generation high temperature superconducting wire manufacturing and R&D at American Superconductor Corporation

Rupich¹,

Li²,

Thieme³

et al. 2009

Supercond. Sci. Technol.

162

View full text Add to dashboard Cite

The RABiTS™/MOD-YBCO (rolling assisted biaxially textured substrate/metal-organic deposition of YBa 2 Cu 3 O 7−δ ) route has been established as a low-cost manufacturing process for producing high performance second generation (2G) wire. American Superconductor Corporation (AMSC) has used this approach to establish a production scale manufacturing line based on a wide-web manufacturing process. This initial production line is currently capable of producing 2G wire in lengths to 500 m with critical currents exceeding 250 A cm −1 width at 77 K, in the self-field. The wide-web process, combined with slitting and lamination processes, allows customization of the 2G wire width and stabilizer composition to meet application specific wire requirements. The production line is currently supplying 2G wire for multiple cable, fault current limiter and coil applications. Ongoing R&D is focused on the development of thicker YBCO layers and improved flux pinning centers. This paper reviews the history of 2G wire development at AMSC, summarizes the current capability of the 2G wire manufacturing at AMSC, and describes future R&D improvements.

show abstract

“…[1][2][3] During their applications, researches acknowledged that I c is dependent on the temperature, magnetic field intensity and its direction, and strain of the superconductors. [4][5][6][7][8][9] So far, one of the most challenging is to protect the conductor and magnet from I c degradation with a high electromagnetic force caused by high magnetic field and the transport of current.…”

Section: Introductionmentioning

confidence: 99%

A direct tensile device to investigate the critical current properties in superconducting tapes

Zhang

Liu

Zhou

et al. 2014

Review of Scientific Instruments

View full text Add to dashboard Cite

We construct an instrument to study the behavior of the critical current in superconducting tapes as a function of magnetic field and axial tension strain. The apparatus combines a material testing machine made by the non-magnetic stainless steel, which is capable of producing mechanical forces up to 1000 N and magnetic field up to 5 T with a homogeneous range of Φ150 × 110 mm. Moreover, the apparatus allows the automatic measurement of time dependence of voltage (V-t) under different magnetic fields and applied strains, which can be used to investigate the vortex instability and its time effect in the superconducting tapes. As an example, the simultaneous measurements of critical current and voltage relaxation with time at various strains and magnetic fields for the YaBa2Cu3O7-x coated conductors are carried out. Comparisons are made with the earlier reports in literature; the strain and magnetic field dependence of critical current indicate consistent behavior of this instrument.

show abstract

Second-Generation HTS Conductor Design and Engineering for Electrical Power Applications

Cited by 26 publications

References 4 publications

Numerical simulations of the angular dependence of magnetization AC losses: coated conductors, Roebel cables and double pancake coils

Numerical simulations of the angular dependence of magnetization AC losses: coated conductors, Roebel cables and double pancake coils

Advances in second generation high temperature superconducting wire manufacturing and R&D at American Superconductor Corporation

A direct tensile device to investigate the critical current properties in superconducting tapes

Contact Info

Product

Resources

About