Practical Method for Transient Stability with Unbalanced Condition based on Symmetric Coordinates

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  • Fujiwara Shuhei
    Transmission & Distribution Systems Center, Mitsubishi Electric Corporation Graduate School of Informatics, Science and Electrical Engineering, Kyushu University
  • Kono Yoshiyuki
    Transmission & Distribution Systems Center, Mitsubishi Electric Corporation
  • Kitayama Masashi
    Transmission & Distribution Systems Center, Mitsubishi Electric Corporation
  • Goda Tadahiro
    Graduate School of Informatics, Science and Electrical Engineering, Kyushu University

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  • 対称座標法に基づく不平衡故障模擬を用いた不平衡機器モデルの開発
  • タイショウ ザヒョウホウ ニ モトズク フヘイコウ コショウ モギ オ モチイタ フヘイコウ キキ モデル ノ カイハツ

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Abstract

The symmetric coordinates are very popular method to model unbalanced faults in power system analysis. It is not only easy to handle with a single fault, but also it can be extended to multiple faults. But it is not easy to model situations that those unbalanced situation will continuously change, like a SVC (Static Var Compensator) with unbalanced fault in power system or an unbalanced nonlinear load. Under these situations, we propose a practical use of multiple fault calculation method based on symmetric coordinates that can handle with these kinds of unbalanced situations.

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