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: 2021/11/01タイトル(英語): Estimation of Amount of the Evaporated OPGW Strand Struck by a High-current Impulse Arc著者名: 中野 智之（（一財）電力中央研究所），神足 将司（（一財）電力中央研究所），岩田 幹正（（一財）電力中央研究所）著者名(英語): Tomoyuki Nakano (Central Research Institute of Electric Power Industry), Masashi Kotari (Central Research Institute of Electric Power Industry), Mikimasa Iwata (Central Research Institute of Electric Power Industry)キーワード: OPGW，架空地線，アーク，インパルス電流発生装置，電流密度 OPGW，ground wire，arc，impulse current generator，current density要約(英語): Strands of an optical fiber composite overhead ground wire (OPGW) can be broken by lightning strikes if the energy of the lightning is high. Especially, winter lightning around Japanese sea coast tends to have huge energy because of its long current duration time, therefore numbers of literatures report results of DC arc tests on OPGWs simulating winter lightning strike on them. On the other hands, short duration high current arc tests have not been conducted enough. This paper reports the results of arc tests on OPGWs using impulse current generator whose output current peak is 50kA and wave front/tail duration of 8/20μs. The arc shape was observed by high speed cameras and observation of the OPGW strand after the test was also conducted. The results seemed that the main cause of melting of the OPGW strand in the test was electric heating due to the voltage and the high current at the boundary between the strand and the arc. Taking the voltage, time variation of current density, characteristics of the material of the OPGW strand into account, simple calculation was done to estimate the melting depth and the evaporated amount of the material due to the arc. According to the results, a strand of the OPGW struck by a short-duration lightning may not be damaged seriously.本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.141 No.11 （2021） 特集：開閉保護技術本誌掲載ページ: 676-686 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/141/11/141_676/_article/-char/ja/
