Development of high-temperature superconducting cable system.

[In Japanese. / En japonais.]


In order to supply large amounts of electric power to meet increasing demand, a high-critical temperature superconducting cable compact enough to be applied to ducts without construction of new underground tunnels is desired. There are, however, many key technologies which are necessary to develop long high-critical temperature cables capable of large capacity in compact size. For the purpose of studying these technologies, two systems were developed and tested. At the first step, a 7-meter long, 3-phase 1 kiloampere superconducting cable system was developed to study issues concerning large current loading. The measurements of alternating-current losses and inductance show the total alternating-current loss of this cable was 3.5 watts/m/cct at 1 kiloampere loading, that hysteretic loss was dominant, and that the magnetic shields were effective enough to reduce the eddy current losses in thermally insulated pipe. As the next step, a 30-meter long, 66 kilovolt-1 kiloampere high-critical temperature superconducting cable system prototype was developed to study issues for long-length cables. In this system, an alternating-current of 40 kilovolts-1 kiloampere was successfully applied in sub-cooled liquid nitrogen regardless of mechanical history, such as handling in the factory, transportation, laying and the axial force due to contraction during cooldown.


  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1999-2080
  • Languages: Japanese
  • Source: Cryogenics/ Cryog. Eng. - vol. 33 - n. 3
  • Publication date: 1998/03
  • Document available for consultation in the library of the IIR headquarters only.


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