Effect of Heat on Multiple Barriers Penetration with Spark Discharge and Upward Leader in Air

カテゴリ: 部門大会

論文No: 51

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): Effect of Heat on Multiple Barriers Penetration with Spark Discharge and Upward Leader in Air

著者名: 佐々木佑樹（福岡大学），荒岡信隆（福岡大学），高村紀充（福岡大学），水崎雅之（九州電力），坂井克成（福岡大学），龍輝優（熊本大学），松田樹也（熊本大学），浪平隆男（熊本大学），花井正広（福岡大学）

著者名(英語): Yuki Sasaki (Fukuoka University), Nobutaka Araoka (Fukuoka University), Norimitsu Takamura (Fukuoka University), Masayuki Mizusaki (Kyushu Electric Power Company), Katsushige Sakai (Fukuoka University), Terumasa Ryu (Kumamoto University), Mikiya Matsuda (Kumamoto University), Takao Namihira (Kumamoto University), Masahiro Hanai (Fukuoka University)

キーワード: 放電孔|気中放電|多重バリア|融点|高速度カメラ|等価半径|penetration hole|air discharge|multiple barrier|melting point|high-speed camera|equivalent radius

要約(英語): When lightning strikes a wind power generator, it often penetrates the blades of wind power generator in spite of being protected from lightning by a receptor. In order to reduce such penetration damage, we have been studying the form of discharge and the main factors of penetration. In our previous study, we made discharges penetrate insulator barriers placed between the electrodes. As a result, equivalent radii calculated from areas of penetration holes varied depending on type of barriers. In this paper, in order to confirm whether heat is related to the penetration of the insulator due to the discharge, barriers having different melting points were used. Then it was investigated whether equivalent radii of the penetration holes become larger with barriers having lower melting point. In addition, we investigated effects of an upward leader on penetration holes generation by using a high-speed camera and a single-lens reflex camera. As a result, the equivalent radii of barriers with a high melting point and it with a low melting point were approximately the same size, but microscope images of barriers suggested that spark discharges could heat barriers. In addition, since no penetration holes were generated after only upward leader passed barriers, it was suggested that upward leaders were low-temperature plasma.

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