Calculation of Temperature Distribution of Electrodes Surface Affected by Stagnation Time of Disconnection Arc

カテゴリ: 研究会(論文単位)

論文No: EPP22075,SA22042,SP22010

グループ名: 【A】基礎・材料・共通部門 放電・プラズマ・パルスパワー/【B】電力・エネルギー部門 静止器/【B】電力・エネルギー部門 開閉保護合同研究会

発行日: 2022/07/17

タイトル(英語): Calculation of Temperature Distribution of Electrodes Surface Affected by Stagnation Time of Disconnection Arc

著者名: Honoka Morishita(Tokyo City University),Asuka Kawaski(Tokyo City University),Masahiro Takagi(Tokyo City University),Yuki Suzuki(Tokyo City University),Zhenwei Ren(Tokyo City University),Yusuke Nemoto(Tokyo City University),Takamasa Hayasaka(Railway Techni

著者名(英語): Morishita Honoka(Tokyo City University),Kawaski Asuka(Tokyo City University),Takagi Masahiro(Tokyo City University),Suzuki Yuki(Tokyo City University),Ren Zhenwei(Tokyo City University),Nemoto Yusuke(Tokyo City University),Hayasaka Takamasa(Railway Techni

キーワード: ｅｌｅｃｔｒｉｃ　ｒａｉｌｗａｙ|ｄｉｓｃｏｎｎｅｃｔｉｏｎ　ａｒｃ|ｔｅｍｐｅｒａｔｕｒｅ　ｄｉｓｔｒｉｂｕｔｉｏｎ|ｃｏｎｔａｃｔ　ｗｉｒｅ|ｔｈｒｅｅ－ｄｉｍｅｎｓｉｏｎａｌ　ｅｌｅｃｔｒｏｍａｇｎｅｔｉｃ　ｔｈｅｒｍａｌ　ｆｕｉｌｄ|electric railway|disconnection arc|temperature distribution|contact wire|three-dimensional electromagnetic thermal fluid simulation

要約(日本語): As the speed and mileage of electric railway increase, the contact strip may be separated from the contact wire because of slight unevenness of the contact wire, and then the disconnection arc may occurs. The contact wire and contact strip are melted by the disconnection arc which leads to wear, and the wear is the dominant factor of lifespan of the contact wire and the contact strip. For this reason, it is required to elucidate the melting mechanism of the contact wire and the contact strip caused by the disconnection arc in order to reduce the cost of maintenance such as wear management and replacement. In addition, this elucidation of melting mechanism integrates the multiple data in physical space such as train running speed, aging deterioration and weather conditions in cyber space. Ultimately, it is expected to be applied to the digital twin technology for predicting the time of wear with repeating the analysis and the simulation. In this study, the objective is to calculate the temperature distribution of the electrode surface affected by stagnation time of disconnection arc using three-dimensional electromagnetic thermal fluid simulation in order to elucidate the melting mechanism of the contact wire and the contact strip. As a result, the volume above the softening temperature at cathode side was expanded which was larger than that at anode side, because the collision of ions at the cathode (γ effect) and thermoionic emission occures.

要約(英語): As the speed and mileage of electric railway increase, the contact strip may be separated from the contact wire because of slight unevenness of the contact wire, and then the disconnection arc may occurs. The contact wire and contact strip are melted by the disconnection arc which leads to wear, and the wear is the dominant factor of lifespan of the contact wire and the contact strip. For this reason, it is required to elucidate the melting mechanism of the contact wire and the contact strip caused by the disconnection arc in order to reduce the cost of maintenance such as wear management and replacement. In addition, this elucidation of melting mechanism integrates the multiple data in physical space such as train running speed, aging deterioration and weather conditions in cyber space. Ultimately, it is expected to be applied to the digital twin technology for predicting the time of wear with repeating the analysis and the simulation. In this study, the objective is to calculate the temperature distribution of the electrode surface affected by stagnation time of disconnection arc using three-dimensional electromagnetic thermal fluid simulation in order to elucidate the melting mechanism of the contact wire and the contact strip. As a result, the volume above the softening temperature at cathode side was expanded which was larger than that at anode side, because the collision of ions at the cathode (γ effect) and thermoionic emission occures.

本誌: 2022年7月20日-2022年7月21日放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会-1

本誌掲載ページ: 53-58 p

原稿種別: 英語

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