密閉容器内の絶縁油中アークによる気泡挙動と圧力上昇現象の数値解析

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2020/04/01

タイトル(英語): Numerical Analysis of Bubble Behavior and Pressure Rise Phenomena Due to Arc under Insulating Oil in Closed Vessel

著者名: 田所　兼（(一財)電力中央研究所 電力技術研究所／東京都市大学 計測電気制御研究室），神足　将司（(一財)電力中央研究所 電力技術研究所），大高　聡也（(一財)電力中央研究所 電力技術研究所），岩田　幹正（(一財)電力中央研究所 電力技術研究所），田中　康寛（東京都市大学 計測電気制御研究室）

著者名(英語): Tomo Tadokoro (Electric Power Engineering Research Laboratory, CRIEPI/Measurement and Electric Machine Control Laboratory, Tokyo City University), Masashi Kotari (Electric Power Engineering Research Laboratory, CRIEPI), Toshiya Ohtaka (Electric Power Engineering Research Laboratory, CRIEPI), Mikimasa Iwata (Electric Power Engineering Research Laboratory, CRIEPI), Yasuhiro Tanaka (Measurement and Electric Machine Control Laboratory, Tokyo City University)

キーワード: 電力機器，短絡故障，アーク，絶縁油，熱分解気泡，圧力上昇　　power equipment，short-circuit fault，arc，insulation oil，pyrolysis bubble，pressure rise

要約(英語): When a fault arc occurs in oil-filled electric power equipment, it generates a flammable pyrolysis bubble. A dynamic pressure rise with the generation of the bubble, may lead to blowout of the oil and a high-temperature flammable gas. This paper presents a numerical model for the analysis of bubble behavior and pressure rise due to the arc in a closed vessel containing air and oil. The model is based on the Rayleigh-Plesset equation which expresses single bubble behavior in liquid to a driving pressure field with consideration of the evaporation/condensation phenomena of the bubble surface and the oil flux. Furthermore, the authors append physical properties of gas and effects of arc energy into the bubble based on measurement and calculation results. The calculated pressure magnitude and frequency of oscillation are similar to the experimental results. The results suggest that the numerical model covered important factors of the bubble behavior and pressure rise phenomena.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.140 No.4 （2020） 特集：2019年基礎・材料・共通部門大会

本誌掲載ページ: 230-240 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/ieejfms/140/4/140_230/_article/-char/ja/