報告書番号

H20004

タイトル（和文）

送電線の雷遮蔽失敗率計算手法の開発　ー雷観測結果に基づく雷撃距離特性ー

タイトル（英文）

Development of calculation method for lightning shielding failure of transmission line -Striking distance characteristics evaluated by the observation results

概要 （図表や脚注は「報告書全文」に掲載しております）

添付ファイル参照

概要 （英文）

It has been reported that the number of lightning flashes striking transmission lines is large compared with the number estimated using the equation proposed by Electro-geometrical model (EGM). EGM is used to estimate the lightning shielding failure rate in Japan. We observed the lightning flashes striking transmission lines and ground to clarify the mechanisms of the lightning shielding failure trip of transmission lines in summer. We used the ALPS, two high-speed digital cameras, and a CCTV video camera to observe the attachment process of lightning strokes. Consequently, we obtained data of flashes striking the transmission lines and flashes striking the ground. From these observation results, we evaluated the values of the striking distance. The measured values of the striking distance are shorter than that calculated by the EGM

報告者

キーワード