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Akihiro Ametani
Researcher at Doshisha University
Publications - 37
Citations - 297
Akihiro Ametani is an academic researcher from Doshisha University. The author has contributed to research in topics: Lightning & Transient (oscillation). The author has an hindex of 9, co-authored 37 publications receiving 280 citations.
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An experimental study of lightning overvoltages in wind turbine generation systems using a reduced‐size model
TL;DR: In this paper, the authors present the result of an experimental study of lightning overvoltages in wind turbine generation systems using a reduced-size wind turbine model, and the results show that the voltage rise due to tower footing resistance can cause a significant voltage difference between the tower foot and an incoming conductor led from a distant point.
Journal ArticleDOI
FDTD Simulation of Lightning Surges on Overhead Wires in the Presence of Corona Discharge
Tran Huu Thang,Yoshihiro Baba,Naoto Nagaoka,Akihiro Ametani,Jun Takami,S. Okabe,Vladimir A. Rakov +6 more
TL;DR: In this paper, a simplified model of corona discharge for finite-difference time-domain (FDTD) computations has been applied to analyzing lightning surges propagating along overhead wires.
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3-D FDTD Computation of Lightning-Induced Voltages on an Overhead Two-Wire Distribution Line
H. Sumitani,T. Takeshima,Yoshihiro Baba,Naoto Nagaoka,Akihiro Ametani,Jun Takami,S. Okabe,Vladimir A. Rakov +7 more
TL;DR: In this article, the 3-D finite-difference time-domain (3-D FDTD) method was used to compute the voltage induced by a 738m long overhead two-wire line with a subgrid model, in which spatial discretization is fine in the vicinity of overhead wires and coarse in the rest of the computational domain.
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On the Mechanism of Current Pulse Propagation Along Conical Structures: Application to Tall Towers Struck by Lightning
A. Shoory,Felix Vega,Peerawut Yutthagowith,Farhad Rachidi,Marcos Rubinstein,Yoshihiro Baba,Vladimir A. Rakov,Keyhan Sheshyekani,Akihiro Ametani +8 more
TL;DR: In this paper, the propagation of lightning current pulses along conical tall structures was studied using the finite element method and the partial equivalent element circuit method, and the results confirmed Baba and Rakov's finite-difference time domain numerical analysis.
Journal ArticleDOI
An Experimental Study of Lightning Overvoltages in Wind Turbine Generation Systems Using a Reduced-Size Model
TL;DR: In this paper, the authors present the result of an experimental study of lightning overvoltages in wind turbine generation systems using a reduced-size wind turbine model, and the results show that the voltage rise due to the tower footing resistance can cause a significant voltage difference between the tower foot and an incoming conductor led from a distant point.