低周波誘導炉起動時の抵抗投入による電圧変動抑制効果の最適化

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: 2014/10/01

タイトル(英語): Optimization of Voltage Dip Suppression Effect by Resistor Insertion in Startup of Low-frequency Induction Furnace

著者名: 吉田　義昭（広島工業大学工学部電気システム工学科）

著者名(英語): Yoshiaki Yoshida (Department of Electrical Systems Engineering, Hiroshima Institute of Technology)

キーワード: 配電線，電力品質，低周波誘導炉，突入電流，電圧ディップ（瞬時電圧低下），抵抗投入　　distribution line，power quality，low-frequency induction furnace，inrush current，voltage dip，resistor insertion

要約(英語): Recently, in the distribution network, the rated capacities of the special loads that have the large starting currents are becoming bigger. So, the technical pre-studies for power quality are very important to suppress voltage troubles. In this study, as a special load, we consider the case that a large low-frequency induction furnace is connected to near the end of distribution network. The rated output is 800kW, and the rated capacity of the electric furnace transformer is 1000kVA. The inrush current generates during startup of the low-frequency induction furnace. By measurement of power quality, it is revealed that the inrush currents consist of the “magnetizing inrush current due to magnetic saturation of the electric furnace transformer” and the “inrush current due to the power factor correction capacitors”. We clarify the influence of the inrush currents on the voltage dip. And the effective measure (resistor insertion method) to reduce the inrush currents is proposed. We performed the EMTP simulation for the optimization of proposed method. As a result, it was verified that the analysis value and the measured value are in good agreement.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.134 No.10 （2014）

本誌掲載ページ: 866-874 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/134/10/134_866/_article/-char/ja/