Evaluation of the Lightning-Induced Voltages of Multiconductor Lines for Striking Cone-Shaped Mountain
Evaluation of the Lightning-Induced Voltages of Multiconductor Lines for Striking Cone-Shaped Mountain
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DOI：
10.1109/temc.2018.2869752
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发表时间：
2019-10
影响因子：
2.1
通讯作者：
Jinbo Zhang;Qilin Zhang;W. Hou;L. Zhang;Fangrong Zhou;Yi Ma;Yutang Ma
中科院分区：
文献类型：
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作者：
Jinbo Zhang;Qilin Zhang;W. Hou;L. Zhang;Fangrong Zhou;Yi Ma;Yutang Ma
本文采用圆柱二维时域有限差分法和Agrawal耦合模型，评估了两种典型的带屏蔽线和不带屏蔽线的多导线配置在有损地面上击中锥形山顶的雷电感应电压。研究发现，与平坦地形的情况相比，垂直和水平配置的雷电电压在击中锥形山体时均明显增强，尤其是在有限地面电导率较低的情况下。山地倾斜角度越大，雷电电压峰值越高，这可以通过山地与平地过渡处的波反射导致雷电电磁场增强来解释。而且，屏蔽线可以有效降低相线两端感应的电压。
This paper evaluates the lightning-induced voltages of two typical multiconductor lines configurations with or without shielding wires over lossy ground for striking the cone-shaped mountain top, by means of a cylindrical two-dimensional finite-difference time-domain method and Agrawal coupling model. It is found that the lightning-induced voltages both for the vertical and the horizontal configurations can be enhanced obviously for striking to the cone-shaped mountain, compared with the case of flat terrain, especially for the lower finite ground conductivity. The larger mountain inclining angle results in the higher peak values of lightning-induced voltages, which can be explained by the enhancement of lightning electromagnetic fields due to wave reflection of the transition between mountain terrain and flat ground. Moreover, the shielding wires can effectively reduce the voltages induced at both ends of the phase lines.