Modified field‐to‐line coupling model for simulating the corona effect on the lightning induced voltages of multi‐conductor transmission lines over a lossy ground. Issue 7 (17th May 2017)

• Record Type: Journal Article
• Authors: Liu, Xin; Yang, Jiawei; Liang, Guishu; Wang, Litong
• Is Part Of: IET generation, transmission & distribution. Volume 11:Issue 7(2017)
• Page Start: 1865
• Page End: 1876
• Publication Date: 2017-05-17
• Subjects: multiconductor transmission lines -- corona -- finite difference time‐domain analysis -- finite element analysis; modified field‐to‐line coupling model -- corona effect -- lightning induced voltages -- lossy ground -- overhead multiconductor transmission lines -- time‐domain finite‐element method -- numerical method -- finite difference time domain -- FDTD -- soil conductivity -- waveform distortion; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2016.1340
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : 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.