66kV架空送電線で発生した交流アークによる電線の素線溶損・溶断状況の解析的評価

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: 2022/12/01

タイトル(英語): Numerical Evaluation of Melting and Breaking Conditions of Strands due to AC Arc Discharge Generated between Wires in 66kV Overhead Transmission Line

著者名: 岩田　幹正（（一財）電力中央研究所），大高　聡也（（一財）電力中央研究所），合田　豊（（一財）電力中央研究所），白石　智規（東京電力パワーグリッド（株））

著者名(英語): Mikimasa Iwata (Central Research Institute of Electric Power Industry (CRIEPI)), Toshiya Ohtaka (Central Research Institute of Electric Power Industry (CRIEPI)), Yutaka Goda (Central Research Institute of Electric Power Industry (CRIEPI)), Tomonori Shiraishi (Tokyo Electric Power Company Power Grid, Inc.)

キーワード: 架空送電線，電力線，地線，交流アーク，素線溶断_x000D_　　overhead transmission line，power line，ground wire，AC arc discharge，melting and breaking of strand

要約(英語): In March 2011, the earthquake off the Pacific coast of Tohoku caused a power line and a ground wire in 66kV overhead transmission line to shake heavily. That led a flashover and an AC arc discharge between the power line (TACSR 240mm2) and the ground wire (AC 70mm2), where the current and the duration of the ground fault was 596A and 0.47s, respectively. Consequently, the power line strands (aluminum strands) were melted and 0 out of 30 strands was broken, and the ground wire strands (aluminum-clad steel strands) were melted and 5 out of 7 strands were broken due to the arc of the ground fault. In this paper, numerical evaluations of melting and breaking conditions of strands of the power line and the ground wire were carried out and the calculation results were compared with the conditions observed in the actual line and wire. As a result, the calculated number of broken strands of the power line was 0, which was agreed with that of the actual line. On the other hand, the calculated number of broken strands of the ground wire was 3-4, which was less than that of the actual wire. It is considered that non-broken but partially-melted 1-2 out of 7 strands in calculations were broken due to an arc jet spouted from the arc spot on the melted strands, and the added tension because of the ground wire shaking as well as the normal tension in the actual field.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.142 No.12 （2022）

本誌掲載ページ: 616-622 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/142/12/142_616/_article/-char/ja/