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FDTD Computation of Lightning Surges on Overhead Wires in the Presence of Corona Discharge

机译:存在电晕放电时架空电线雷电浪涌的FDTD计算

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In this paper, a simplified model of corona discharge for the finite-difference time-domain (FDTD) computations has been applied to analyzing a lightning surge propagating along a 12.65-mm-radius and 1.4-km long overhead horizontal wire, which simulates the experiment of Inoue (1983). The critical electric field on the surface of the 12.65-mm-radius wire for corona initiation is set to E0=1.4, 2.4 or 2.9 MV/m. The critical background electric field for streamer propagation is set to Ecp=0.5 MV/m for positive voltage applications, and Ecn=1.5 MV/m for negative voltage applications. The FDTD-computed waveforms of surge voltage at different distances from the energized end of the wire agree reasonably well with the corresponding measured waveforms.
机译:本文将有限时域(FDTD)计算的电晕放电简化模型用于分析沿12.65毫米半径和1.4公里长的架空水平导线传播的雷电浪涌,从而模拟了井上(1983)的实验。用于电晕引发的12.65毫米半径半径的导线表面上的临界电场设置为E0 = 1.4、2.4或2.9 MV / m。对于正电压应用,用于拖缆传播的临界背景电场设置为Ecp = 0.5 MV / m,对于负电压应用,设置为Ecn = 1.5 MV / m。 FDTD计算的,距离导线通电端不同距离的电涌电压波形与相应的测量波形相当吻合。

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