空気-水の二相系密閉容器内の水中アークによる圧力変動―アークの水深が圧力変動に及ぼす影響―

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: 2014/05/01

タイトル(英語): Pressure Fluctuation due to an Underwater Arc in a Closed Vessel Containing Air and Water―Influence of Depth of Arc on Pressure Fluctuation―

著者名: 田所　兼（（一財）電力中央研研究所），神足　将司（（一財）電力中央研研究所），大高　聡也（（一財）電力中央研研究所），天川　正士（（一財）電力中央研研究所）

著者名(英語): Tomo Tadokoro （Electric Power Engineering Research Lab., Central Research Institute of Electric Power Industry （CRIEPI））, Masashi Kotari （Electric Power Engineering Research Lab., Central Research Institute of Electric Power Industry （CRIEPI））, Toshiya Ohtaka （Electric Power Engineering Research Lab., Central Research Institute of Electric Power Industry （CRIEPI））, Tadashi Amakawa （Electric Power Engineering Research Lab., Central Research Institute of Electric Power Industry （CRIEPI））

キーワード: 圧力変動，水中アーク，気泡，油入電力機器，短絡故障　　pressure fluctuation，underwater arc，bubble，oil-filled electrical equipment，short-circuit fault

要約(英語): When a fault arc occurs in oil-filled electrical equipment such as transformers in transmission and distribution systems, it generates a flammable gas and a dynamic pressure fluctuation that may trigger an explosion. The purpose of this fundamental study is to investigate the effects of an underwater arc on pressure fluctuation in a closed vessel containing air and water before examining the arc phenomena in the electrical insulating oil. In particular, this paper is intended to investigate the influence of the depth of the underwater arc on the peak pressure amplitude in air and water. The pressure fluctuations in both air and water are measured under experimental conditions involving an arc current ranging from 2.3 to 6.7kA, an arc duration of 20ms and a depth of underwater arc Darc from 0.255 to 1.135m. Experimental results show that the depth of underwater arc influences not only the waveform of pressure fluctuation in air and water but also the peak pressure amplitude though the same electrical condition of the arc. In addition, the maximum pressure rise in water has a depthwise distribution due to a water movement.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.134 No.5 （2014）

本誌掲載ページ: 427-435 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/134/5/134_427/_article/-char/ja/