A new class of AC superconducting conductors

Verhaege, T.; Estop, P.; Weber, W.; Lacaze, A.; Laumond, Y.; Bonnet, P.; Ansart, A.

doi:10.1109/77.233696

Cited by 16 publications

(1 citation statement)

References 7 publications

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“…One of the most successful projects was headed by Alsthom, in which they succeeded in the development of a 40 kV, 315 A resistive SCFCL Verhaege et al (1996). The wire was made of ultra-fine NbTi filaments in a highly resistive CuNi matrix (Verhaege et al 1993). It was mentioned that one of the main remaining difficulties will be to manage the cryogenics and to avoid any helium loss.…”

Section: Historymentioning

confidence: 99%

High-temperature superconductor fault current limiters: concepts, applications, and development status

Noë

Steurer

2007

Supercond. Sci. Technol.

473

256

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The application of superconducting fault current limiters (SCFCLs) in power systems is very attractive because SCFCLs offer superior technical performance in comparison to conventional devices to limit fault currents. Negligible impedance at normal conditions, fast and effective current limitation within the first current rise and repetitive operation with fast and automatic recovery are the main attributes for SCFCLs. In recent years there has been a significant progress in the research and development (R&D) of SCFCLs. This paper gives an extended review of different SCFCL concepts, SCFCL applications and the R&D status. Within the first part of this paper the most important SCFCLS and, to a limited extent, non-superconducting fault current limiter (FCL) concepts are explained and compared. The second part reviews interesting SCFCL applications at the distribution and transmission voltage level and the third part shows in detail the R&D status. It can be summarized that SCFCLs are, at present, not commercially available but several successful field tests demonstrated the technical feasibility of SCFCLs. First distribution level applications are expected soon. Considerable economical and technical benefits can be achieved by applying SCFCLs at the distribution and transmission voltage level.

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Section: Historymentioning

confidence: 99%

High-temperature superconductor fault current limiters: concepts, applications, and development status

Noë

Steurer

2007

Supercond. Sci. Technol.

473

256

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Superconducting Transformers

Kalsi

1999

Wiley Encyclopedia of Electrical and Electronics Engineering

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High‐Temperature Superconducting Transformers

Kalsi¹

2015

Wiley Encyclopedia of Electrical and Electronics Engineering

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The HTS technology, invented in 1986, has the potential for reducing size and mass, and increasing efficiency of power equipment. The HTS transformers are discussed in this article. The discussion provides rationale for selecting HTS over LTS. Available cryogenic cooling options are also discussed for cooling HTS coils. The ReBCO‐coated conductor is a promising candidate for providing acceptable properties at LN 2 temperature. It could be transformed into Roebel cables for carrying larger currents. An example design of a 50 MVA transformer is included for illustrating design, technology, and economic issues. Calculated HTS transformer size, weight, efficiency, and cost are compared with a conventional transformer of similar rating. The HTS‐based technology appears ready for commercial exploitation. The Roebel cable can be used for constructing windings for utility power transformers. Cryogenic cooling technologies, for cooling to LN 2 temperature, have also sufficiently matured for such applications. This article shows that an HTS transformer costing three times the cost of a conventional transformer looks more attractive on the basis of 30‐year ownership cost than a conventional transformer. The HTS wire price ($250/kA‐m) assumed in this study is three times higher than $80/kA‐m price (projected by HTS industry) in a decade. The lower price HTS material will make the HTS transformers very attractive. In order to gain confidence of the user community, prototyping of industrial‐scale transformers must be undertaken for demonstrating feasibility and reliability aspects. The future of HTS transformers looks attractive but a concerted effort is needed to realize it.

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A new class of AC superconducting conductors

Cited by 16 publications

References 7 publications

High-temperature superconductor fault current limiters: concepts, applications, and development status

High-temperature superconductor fault current limiters: concepts, applications, and development status

Superconducting Transformers

High‐Temperature Superconducting Transformers

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