Development of an Orthogonal-Core-Type Variable Power Reactor

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  • Maeda M.
    Research and Development Center, Tohoku Electric Power Co., Inc.
  • Sakamoto M.
    Research and Development Center, Tohoku Electric Power Co., Inc.
  • Mitamura K.
    Research and Development Center, Tohoku Electric Power Co., Inc.
  • Ichinokura O.
    Faculty of Engng., Tohoku Univ.

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Other Title
  • 直交磁心形電力用可変リアクトルの開発
  • チョッコウ ジシンケイ デンリョクヨウ カヘン リアクトル ノ カイハツ

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Abstract

This paper describes the development of an orthogonal-core-type variable reactor. The variable reactor is used in an automatic voltage regulator (AVR), which stabilizes the distribution line voltage by controlling the reactive power. The structure of the orthogonal core, consisting of copper and iron, gives it high endurance and reliability, and it is therefore expected to be used in power systems. We previously presented the dc-ac converter and the Var compensator, which have an orthogonal core. However, this orthogonal core distorts the current because of its non-linear characteristic in a magnetic circuit, making it necessary to reduce the current, before the core can be used in a high-capacity apparatus in a power system. In this paper, we report that we reduced the current by partly reforming the orthogonal core, and developed a variable reactor that incorporates this improvement.

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