変圧器等価回路定数推定に基づく励磁突入電流の判定法

カテゴリ: 部門大会

論文No: 60

グループ名: 【B】令和6年電気学会電力・エネルギー部門大会

発行日: 2024/08/23

タイトル(英語): Detection Method of Transformer Inrush Current Based on Estimated Parameters of Transformer Equivalent Circuit

著者名: 松村昇輝（日立エナジージャパン），舟木剛（大阪大学），湧谷栄之（関西電力送配電），坂本拓哉（関西電力送配電），米澤憲人（関西電力送配電）

著者名(英語): Shoki Matsumura (Hitachi Energy Japan), Tsuyoshi Funaki (Osaka University), Masayuki Wakutani (Kansai Transmission and Distribution), Takuya Sakamoto (Kansai Transmission and Distribution), Kento Yonezawa (Kansai Transmission and Distribution)

キーワード: 変圧器|変圧器保護|励磁突入電流|z変換|transformer|transformer protection|inrush current|z transform

要約(日本語): Protection relays are used to ensure stable and efficient operation of the transformer. Protection relays detects the transformer fault and remove the fault point rapidly. However, there is a possibility that the transformer inrush current causes the maloperation of protection relay. Therefore, it is necessary to detect the inrush current instantaneously.This paper proposes a method for detecting transformer inrush current based on equivalent circuit parameters of transformer. This method estimates transformer equivalent circuit parameters from voltage and current waveforms using z-transform. The proposed method has the ability to detect inrush current faster and less computational complexity than conventional methods. To evaluate the theoretical principles of the proposed method, numerical simulation using MATLAB are performed. In addition, the proposed method is verified experimentally for a single-phase transformer.

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