Thursday, 1A-06, 5:15-5:25

Fault Current Limiter Using Coated Conductor

Takashi Yazawa

M. Urata^a, Y. Iijima^b, T. Saitoh^b, Naoyuki Amemiya^c, Yuh Shiohara^d

^aToshiba Corporation, ^bFujikura Ltd., ^cKyoto University ^d ISTEC, Japan
Telephone: +81-3-3457-3793, fax:+81-3-5444-9203, e-mail address:takashi.yazawa@toshiba.co.jp

As one of the programs in the Ministry of Economy and Trade and Industry (METI) project carried out in FY2006 and 2007, a coated conductor utilized for resistive-type superconducting fault current limiter (SFCL) was developed and evaluated. The conductors used in this work were ReBCO tapes, such as YBCO and GdBCO, formed on ion-beam-assisted deposition (IBAD) substrates by using a pulse laser deposition (PLD) process. In order to obtain high resistance of the conductor, which is preferable to an SFCL, the thickness of the protecting layer made of silver was decreased as possible. Then high-resistive metal stabilizing layer was attached on the silver layer to improve stability. The critical current of the conductor with this configuration was increased up over 300A/cm. When excess current was applied to the developed conductor, uniform voltage distribution was obtained in the longitudinal direction. In the program, three-phase 6.6kV superconducting fault current limiter (SFCL) was finally fabricated and some evaluation tests were implemented.

Acknowledgement
This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications.

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