Computation of Lightning-Induced Voltages for Striking Oblique Cone-Shaped Mountain by 3-D FDTD Method
Computation of Lightning-Induced Voltages for Striking Oblique Cone-Shaped Mountain by 3-D FDTD Method
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DOI：
10.1109/temc.2018.2869607
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发表时间：
2019-10
影响因子：
2.1
通讯作者：
Jinbo Zhang;Qilin Zhang;Fangrong Zhou;Yi Ma;Hao Pan;W. Hou
中科院分区：
文献类型：
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作者：
Jinbo Zhang;Qilin Zhang;Fangrong Zhou;Yi Ma;Hao Pan;W. Hou
分析了斜锥形山体遭受雷击时，对配电线路上雷电感应电压的影响。采用直角坐标系下的三维时域有限差分法计算雷电电磁场，采用Agrawal耦合模型计算雷电感应电压。仿真结果给出了一个斜锥形山与不同的倾斜角度，并为不同的相对位置的配电线放置在非平坦的有耗地形。研究发现，当雷击斜锥形山顶时，雷电感应电压与配电线路所处的山体倾斜角度以及其他山体倾斜角度密切相关，一般情况下，感应电压峰值随山体倾斜角度的增大而增大。例如，当倾角β = 45°时，α = 26.6°、45°和63.4°时（倾角β与倾角β相反），线路近端的感应电压分别比平地增加24%、60%和106%。
This paper analyzes the effect of lightning strikes to an oblique cone-shaped mountain on the lightning-induced voltages on the power distribution line. The lightning-generated electromagnetic fields are calculated by using a three-dimensional finite-difference time-domain method in Cartesian coordinates, and the lightning-induced voltages are computed by means of Agrawal coupling model. The simulation results are presented for an oblique cone-shaped mountain with different inclining angles, and for different relative positions of the distribution line placed over nonflat lossy terrain. It is found that, when lightning strikes the top of an oblique cone-shaped mountain, the lightning-induced voltages are closely related with the mountain inclining angles where the distribution line is located above as well as the other mountain inclining angles; in general, the peak values of induced voltages increase with increasing inclining angles. For example, for the constant angle β = 45° (the inclining angle where the line is located above), the induced voltages at the close end of line for α = 26.6°, 45°, and 63.4° (the inclining angle opposite to angle β) is increased by 24%, 60%, and 106% as compared with that for flat ground, respectively.