Open AccessModified field‐to‐line coupling model for simulating the corona effect on the lightning induced voltages of multi‐conductor transmission lines over a lossy ground
Author(s) -
Liu Xin,
Yang Jiawei,
Liang Guishu,
Wang Litong
Publication year - 2017
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2016.1340
Subject(s) - finite difference time domain method , lightning (connector) , transmission line , corona (planetary geology) , conductor , electric power transmission , voltage , corona discharge , acoustics , electrical conductor , physics , computational physics , coupling (piping) , time domain , waveform , electronic engineering , electrical engineering , materials science , engineering , optics , computer science , mathematics , geometry , power (physics) , quantum mechanics , astrobiology , venus , metallurgy , computer vision
A modified field‐to‐line coupling model for simulating the corona effect on the lightning induced voltages of the overhead multi‐conductor transmission lines is proposed in this study. Since the model is non‐linear, it is solved in an iterative way combining with the time‐domain finite‐element method and is validated by the measurements of Inoue's experiments. Furthermore, the unconditional stability of the numerical method is theoretically proved. The proposed model is a simplified method according to the method recently proposed by Thang et al. , in which finite difference time domain (FDTD) is used to calculate the induced voltages. Compared with FDTD, the proposed model can achieve good efficiency because the transmission line theory is adopted instead of the electromagnetic solution. Both the effects of the corona and the lossy ground on the induced voltage are studied, furthermore, the relationship between the corona effect and the soil conductivity is discussed. The simulation results demonstrate that the corona effect will cause a rise time increase and waveform distortion of the induced voltage, and the magnitudes of induced voltages in the presence of corona discharge are larger than those computed without considering corona.