耐雷架空地線の開発とロケット誘雷の実雷撃電流による耐雷性能の検証

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  • Development of Lightning-resistant Overhead Ground Wire and Characteristics against Lightning Current Triggered by Rocket
  • タイライ カクウ チセン ノ カイハツ ト ロケット ユウライ ノ ジツライゲ

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It has been important to maintain high reliability for supplying electric power in recent high- intelligent society. Overhead ground wires (GW) are installed at upper positions of overhead transmission lines in order to prevent lightning attack on conductors. As the sacrifice, GW sometimes gets certain damages including strand-breakage by a severe lightning attack. Recently, optical fiber composite ground wire (OPGW), which has arisen for development of strong GW against lightning attack, in particular for transmission lines passing through areas where “winter lightning” with enormous electric charge occurs, or areas where frequent lightning occurs.<br> We investigated materials and strand structures to get high lightning-resistant properties and verified by rockettriggered lightning experiments and DC arc tests. As the results, we have developed excellent lightning-resistant OPGW that has fundamental properties equivalent to conventional GW.

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