Numerical Simulation for Analyzing Re-strike Phenomenon Occurrence Conditions in Magnetic Driven Arc

カテゴリ: 部門大会

論文No: 54

グループ名: 【B】令和2年電気学会電力・エネルギー部門大会

発行日: 2020/08/28

タイトル(英語): Numerical Simulation for Analyzing Re-strike Phenomenon Occurrence Conditions in Magnetic Driven Arc

著者名: 任振威（東京都市大学），森下穂香（東京都市大学），根本雄介（東京都市大学），真栄田義史（東京都市大学），岩尾徹（東京都市大学）

著者名(英語): Zhenwei Ren (Tokyo City University), Honoka Morishita (Tokyo City University), Yusuke Nemoto (Tokyo City University), Yoshifumi Maeda (Tokyo City University), Toru Iwao (Tokyo City University)

キーワード: 直流遮断器|リストライク現象|数値計算|絶縁破壊|磁気駆動アーク|direct current circuit breaker|re-strike phenomenon|numerical simulation|electrical breakdown|magnetic driven arc

要約(英語): Re-strike phenomenon occurs while the direct current circuit breakers (DCCB) interrupts the fault current, which causes the interruption time extension and serious damage to the DCCB. However, the reason of the re-strike frequency increment remains unsolved when the external magnetic field applied. In this paper, a three-dimensional electromagnetic thermal fluid simulation program is developed to analyze the occurrence conditions of re-strike phenomenon when different external magnetic field densities applied. Based on the quantitative analyses of simulation results, the electric field density between the re-strike point and the arc column right before the re-strike phenomenon occurrence decreases along with the external magnetic field density increase. Because the gas temperature of the re-strike point area becomes higher and leads to the electrical breakdown occur at a lower electric field density. As a result, it was elucidated that the re-strike phenomenon occurrence not only affect by the electric field density between the re-strike point and the arc column, but also the gas temperature of the re-strike point area.

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