FDTD Simulation of LEMPs Considering Ground Geometry and Grounded Structure

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: 2014/03/01

タイトル(英語): FDTD Simulation of LEMPs Considering Ground Geometry and Grounded Structure

著者名: Naoki Shibata (College of Science and Engineering, Doshisha University), Masanori Aoki (College of Science and Engineering, Doshisha University), Yoshihiro Baba (College of Science and Engineering, Doshisha University), Naoto Nagaoka (College of Science a

著者名(英語): Naoki Shibata (College of Science and Engineering, Doshisha University), Masanori Aoki (College of Science and Engineering, Doshisha University), Yoshihiro Baba (College of Science and Engineering, Doshisha University), Naoto Nagaoka (College of Science and Engineering, Doshisha University), Akihiro Ametani (College of Science and Engineering, Doshisha University), Naoki Itamoto (Institute of Research and Development, Hokuriku Electric Power Company)

キーワード: lightning，lightning current，lightning electromagnetic field，FDTD method

要約(英語): Azimuthal magnetic fields at a far distance (50km), generated by a lightning strike to the top of a mountain and to the top of an 80-m-high grounded object located on the top of a mountain, have been analyzed using the finite-difference time-domain (FDTD) method in the two-dimensional cylindrical coordinate system. Also, the influence of the presence of a mountain range located between the lightning strike point and field observation point on the remote azimuthal magnetic field has been studied. Azimuthal magnetic fields associated with a lightning strike to the top of a mountain are higher than those associated with the corresponding strike to a flat ground for both fast- and slow-front lightning currents. The presence of an 80-m-high strike object further increases magnetic field peaks for higher ground conductivity (≧ 1000mS/m) and shorter current risetime (≦ 1μs). The far-field enhancement due to the presence of a lightning-struck mountain decreases with decreasing the ground conductivity. The shielding effect due to a 1-km-high mountain range located between the strike point and observation point is insignificant except for relatively fast-front lightning currents.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.134 No.3 （2014） 特集：IWHV2012 & JK2012

本誌掲載ページ: 267-272 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejpes/134/3/134_267/_article/-char/ja/