Design and demonstration of superconducting power link

Lehtonen, Juha; Freyhardt, H.C.; Usoskin, A.; Even, Adir; Pierson, E.; Collet, Manuel; Wolf, Alexey A.; Herrmann, P.F.

doi:10.1049/ip-gtd:20041135

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…So far the high temperature superconductor (HTS) multifilamentary tapes with silver sheath have achieved good performance at direct currents. At the moment also a totally new type of HTS, Y 1 Ba 2 Cu 3 O x thin-film coated conductor, is emerging in the market [1].…”

Section: Introductionmentioning

confidence: 99%

Hall sensor magnetometer for ac characterization of high temperature superconducting tapes

Masti

Lehtonen

Perala

et al. 2005

Meas. Sci. Technol.

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During the last five years, the ac performance of high temperature superconductor (HTS) tapes has been under intense development due to the need of practical applications. In order to measure and understand the current density distributions inside these tapes, several methods have already been developed. However, no system has been able to give the time dependent, spatial distribution of the magnetic flux density at a selected distance above the HTS tape carrying any cyclic current signal. In this paper, such a system operating at a frequency range of 0–400 Hz is presented, and possible error sources are extensively investigated. Post-processing of the measured data is explained in detail and error analysis of several example measurements is given. Measurements with HTS and copper samples are compared in order to demonstrate the usefulness of the system.

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Section: Introductionmentioning

confidence: 99%

Hall sensor magnetometer for ac characterization of high temperature superconducting tapes

Masti

Lehtonen

Perala

et al. 2005

Meas. Sci. Technol.

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“…However, in this paper only tubular copper formers are studied, for three reasons. First, it has been shown that a short YBCO cable can be designed to operate as a fault current limiter as well [21]. In this kind of system, solid copper formers could be useful to dissipate the energy during fault currents.…”

Section: Resultsmentioning

confidence: 99%

Fault current model for YBCO cables

Rostila¹,

Lehtonen²,

Masti³

et al. 2006

Supercond. Sci. Technol.

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Superconducting cables can be used to transport large amounts of energy with small losses in considerably smaller volume compared to conventional cables. At present, the first YBCO cable demonstrations are under development and they are expected to outperform BSCCO cables. Due to extremely high current densities in very thin superconducting films these cables are sensitive to overcurrents and therefore cable designers should be able to predict their behaviour during faults. In this paper, the temperature distribution in various 1 kA YBCO cable geometries was computed with several fault current waveforms in order to study the cable stability. FEM models were used to determine simultaneously both the current density and the temperature distributions of the cable as functions of time. Real temperature dependent properties of the cable materials and the strong magnetic field and current density dependence of the superconductor resistivity were taken into account.

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Design and demonstration of superconducting power link

Cited by 2 publications

References 8 publications

Hall sensor magnetometer for ac characterization of high temperature superconducting tapes

Hall sensor magnetometer for ac characterization of high temperature superconducting tapes

Fault current model for YBCO cables

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