変圧器加圧時の励磁突入電流および電圧低下率の解析式に基づく計算手法

カテゴリ: 論文誌(論文単位)

グループ名: 【B】電力・エネルギー部門

発行日: 2024/09/01

タイトル(英語): A Calculation Method based on Analytical Formulas for Inrush Currents and Voltage Dips during Energization

著者名: 米澤　力道（（一財）電力中央研究所／明治大学大学院理工学研究科電気工学専攻），川﨑　章司（明治大学大学院理工学研究科電気工学専攻）

著者名(英語): Rikido Yonezawa (Central Research Institute of Electric Power Industry (CRIEPI)/Department of Electrical Engineering, Graduate School of Science and Technology, Meiji University), Shoji Kawasaki (Department of Electrical Engineering, Graduate School of Science and Technology, Meiji University)

キーワード: 電力品質，瞬時電圧低下，グリッドコード，保護リレー整定，瞬時値解析　　power quality，voltage dip，grid code，protection relay setting，electromagnetic transient analysis

要約(英語): If a voltage dip gets lower than a certain threshold at the moment when a transformer is energized, its mitigation is required. For this reason, when a transformer is energized, the voltage dip is calculated in advance and the need for its mitigation is considered. From the viewpoint of preventing unnecessary countermeasures, highly accurate calculations are required. However, electromagnetic transient analysis, which is known as a method with high accuracy, is not practical because its operation is rather complicated. In this paper, the analytical circuit is simplified by simulating the magnetizing inductance of the transformer with the inductance and the series connection of the ideal switch, and analytical formulas for the flux and current in the winding are derived for each switching mode. The calculated inrush currents and voltage dips during transformer energization using the derived analytical formulas agreed well with the results from electromagnetic transient analysis, which handled the nonlinear current-flux characteristics precisely.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.144 No.9 （2024）

本誌掲載ページ: 490-502 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejpes/144/9/144_490/_article/-char/ja/