Quench Protection of Superconducting Transformers

M. Iwakuma, K. Funaki, M. Takeo, K. Yamafuji

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

Protection of superconducting transformers from the quench caused by excess fault current was studied theoretically with the aid of a simple equivalent circuit model which was composed of leakage inductance and resistances of the conductor. We distinguished the resistance in the flux-flow state from that in the normal state, and basic parameters of the transformer, such as sizes, leakage inductance and conductor length were described as functions of one-turn voltage. The quench process after the short-circuit was numerically analyzed by this circuit equation with the aid of the heat-balance equation. It was shown that the maximum temperature rise of the conductor until interruption of the power line increases monotonically with the one-turn voltage, but has a minimum around several percent of the copper ratio in the conductor. To suppress the temperature rise, therefore the one-turn voltage should be limited to smaller values than that in the conventional transformers even if the copper ratio is optimized for the rated capacity and voltage.

本文言語英語
ページ(範囲)2080-2083
ページ数4
ジャーナルIEEE Transactions on Magnetics
27
2
DOI
出版ステータス出版済み - 3 1991

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 電子工学および電気工学

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