低温工学
Online ISSN : 1880-0408
Print ISSN : 0389-2441
ISSN-L : 0389-2441
押出しポリエチレン絶縁超電導ケーブルの交流損失
市川 路晴湯田 直毅水野 幸男長尾 雅行小崎 正光
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1989 年 24 巻 6 号 p. 338-344

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In recent years, interest in the application of superconductivity to the electric power apparatuses has grown rapidly. In ac power apparatuses, loss induced by alternating current is a impeding problem which has to be reduced. A superconducting power cable is one of the promising ways for transmitting huge electric power efficiently in the future. We have proposed the new ac superconducting cable design with a similar electrical insulation structure to the conventional extruded cross-linked polyethylene cable (CV cable). The feature of this cable is to exploit the excellent electrical insulation capability of polymers at cryogenic temperature by separating helium coolant from the electrical insulation. The conductor of the superconducting cable consists of niobium clad over a copper flat wire and niobium tape, which are wound helically in the opposite direction each other on a copper pipe. In order to clarify the ac loss mechanism in this cable design, measurements and analysis of the ac loss of the superconductor have been carried out at the liquid helium temperature.

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