Open AccessWaveform Reconstruction of Lightning Current Based on Output‐Error Model and Finite‐Difference Time‐Domain Method
Author(s) -
Fu Yapeng,
Zhang Qi,
Yang Bo
Publication year - 2021
Publication title -
earth and space science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.843
H-Index - 23
ISSN - 2333-5084
DOI - 10.1029/2020ea001311
Subject(s) - finite difference time domain method , lightning (connector) , waveform , transfer function , time domain , electromagnetic field , electromagnetic pulse , current (fluid) , computer science , acoustics , channel (broadcasting) , point (geometry) , finite difference method , mathematical analysis , physics , mathematics , geometry , electrical engineering , engineering , optics , telecommunications , radar , power (physics) , quantum mechanics , computer vision
A simple method combining Output‐Error (OE) model and Finite‐Difference Time‐Domain (FDTD) method is proposed to reconstruct lightning current in this paper. First, the FDTD method is adopted to calculate electromagnetic fields of any desired point, and the transfer function between the obtained fields and channel base current is built by using OE model. Then, the lightning current is reconstructed by putting the actual measured electromagnetic field into the corresponding transfer function. The validity of the proposed method is demonstrated through the measured data given in the literature. Moreover, three influence factors on the reconstruction performance of this method are analyzed as well, including the effect of distance from field observation point to lightning channel, ground conductivity and the velocity of return stroke.