励磁突入電流の瞬時値解析を目的とした三相変圧器の電流-磁束特性推定手法

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: 2020/02/01

タイトル(英語): A Method for Estimating the Current-Flux Curve of a Three-Phase Transformer for Electromagnetic Transient Simulations of Inrush Currents

著者名: 久納　敬史（（一財）電力中央研究所エネルギーイノベーション創発センター配電システムユニット解析フロンティアグループ），野田　琢（（一財）電力中央研究所エネルギーイノベーション創発センター配電システムユニット解析フロンティアグループ），市川　路晴（（一財）電力中央研究所電力技術研究所）

著者名(英語): Takafumi Kuno (Simulation Frontier Group, ENIC, CRIEPI), Taku Noda (Simulation Frontier Group, ENIC, CRIEPI), Michiharu Ichikawa (Electric Power Engineering Research Laboratory, CRIEPI)

キーワード: 励磁突入電流，三相変圧器，電流-磁束特性，瞬時値解析，配電系統　　inrush currents，three-phase transformers，current-flux curves，electromagnetic transient simulations，distribution systems

要約(英語): When a transformer of a customer is energized in a distribution system, inrush currents whose magnitudes reach tens of rated currents may occur. The inrush currents may lead to an instantaneous voltage drop and/or an unnecessary operation of an overcurrent relay, and thus they affect power quality in the distribution system. When a new customer is connected to a distribution system, transmission and distribution companies in Japan use current-versus-time data of transformer inrush currents for their studies. However, such studies using current-versus-time data give worst-case or overestimated results. So as to obtain more accurate results, current-versus-flux curves of transformers are required to carry out simulations using an electromagnetic transient analysis program such as XTAP. So far, we have developed a method for estimating the current-versus-flux curve of a single-phase transformer from its current-versus-time data. Considering the fact that most of customer transformers are three-phase ones, this paper proposes a method for estimating the current-versus-flux curve of a three-phase transformer. The proposed method is validated by inrush-current experiments using two different three-phase transformers.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.140 No.2 （2020）　特集：令和元年電力・エネルギー部門大会

本誌掲載ページ: 34-41 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/140/2/140_34/_article/-char/ja/