FDTD Computation of Lightning-Induced Voltages on Multiconductor Lines With Surge Arresters and Pole Transformers
| Autor: | Tran Huu Thang, Yoshihiro Baba, Alexandre Piantini, Vladimir A. Rakov |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Permittivity
Engineering business.industry Surge arrester Finite-difference time-domain method Finite difference method Electrical engineering Mechanics Condensed Matter Physics Atomic and Molecular Physics and Optics law.invention law Waveform Electrical and Electronic Engineering business Transformer Electrical conductor Voltage |
| Zdroj: | IEEE Transactions on Electromagnetic Compatibility. 57:442-447 |
| ISSN: | 1558-187X 0018-9375 |
| DOI: | 10.1109/temc.2014.2382115 |
| Popis: | In this paper, lightning-induced voltages on multiconductor lines with surge arresters and pole transformers have been computed using the 3-D finite-difference time-domain method. This method uses a subgrid model, in which spatial discretization is fine (cell side length is 0.5 m) in the vicinity of overhead wires and coarse (cell side length is 5 m) in the rest of the computational domain. In the simulations, four-conductor lines with surge arresters and pole transformers are considered. The 1-cm-radius overhead conductors are represented by placing a wire having an equivalent radius of about 0.12 m (≈ 0.23 × 0.5 m) in the center of an artificial rectangular prism having a cross-sectional area of 1 m × 1 m (2 cells × 2 cells) and the modified (relative to air) constitutive parameters: lower electric permittivity and higher magnetic permeability. The computed lightning-induced voltage waveforms agree reasonably well with the corresponding ones measured in the small-scale experiment of Piantini et al. (2007). |
| Databáze: | OpenAIRE |
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