DocumentCode :
56607
Title :
Validation of the Approximate Time-Domain Method for the Lightning-Horizontal Electric Field at the Surface of Two-layer Earth by Using FDTD
Author :
Qilin Zhang ; Liang Zhang ; Wenhao Hou ; Jianfeng Su
Author_Institution :
Collaborative Innovation Center on Forecast & Evaluation of Meteorol. Disasters, Nanjing Univ. of Inf. Sci. & Technol., Nanjing, China
Volume :
56
Issue :
5
fYear :
2014
fDate :
Oct. 2014
Firstpage :
1121
Lastpage :
1128
Abstract :
Based on the two-dimensional finite-difference time-domain (2-D FDTD) method, we have validated the time-domain method presented by Barbosa (B-P formula) for calculating the lightning-radiated horizontal electric field at the earth surface within distances from 30 to 1000 m from the lightning channel, considering the horizontally stratified earth. The results show that, except for distances in the vicinity of the lightning channel (e.g., 30 m), the B-P approximate formula can approximately predict the field peak value from 50 to 1000 m with a satisfactory accuracy within errors of 10% and its accuracy for subsequent return strokes seems to be more or less the same as that for first return strokes. The rise-time part of the field wave predicted by the B-P approximate formula is similar to that predicted by the 2-D FDTD, however, the tail of the wave predicted by the B-P approximation may be shorter than that by the 2-D FDTD (e.g., 30 and 50 m).
Keywords :
electric fields; finite difference time-domain analysis; lightning; 2D finite difference time-domain method; B-P approximation; Earth surface; FDTD; approximate time-domain method; distance 30 m to 1000 m; lightning channel; lightning return strokes; lightning-horizontal electric field; stratified Earth; Accuracy; Earth; Finite difference methods; Frequency-domain analysis; Lightning; Surface impedance; Time-domain analysis; Lightning horizontal field; lightning return stroke; stratified earth; two-dimensional finite-difference time domain (2-D FDTD);
fLanguage :
English
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9375
Type :
jour
DOI :
10.1109/TEMC.2014.2309598
Filename :
6780988
Link To Document :
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