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The line-lightning performance and mitigation studies of shielded steel- structure distribution lines

机译：屏蔽钢结构配电线路的防雷性能和缓解措施研究

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摘要

The over voltage on the electric power line is the function of line design and the lightning incidence. The occurrence of lightning in Malaysia is amongst the highest recorded in the world and it is beyond our control. However the designs of power line are within the engineer's control. As overhead distribution lines and their associated equipments are most prone to insulation failure due to lightning and very much affected in terms of reliability, a study was intended to determine the line lightning performance and to analyze available mitigation options focusing on medium voltage overhead distribution line. In this paper, simulation using commercially available software to determine the lightning performance of the chosen lines will be discussed. A Monte Carlo statistical method is applied for the simulation of lightning activity, while a three-dimensional Electro-geometric model is adopted for the determination of stroke termination. Shielding from the nearby objects is also taken into account. Linear and non-linear tower footing resistance (TFR) representation, counterpoises, leader propagation flashover model are among standard features used in the simulations. Simulations are carried out to study the effects of critical flashover (CFO) voltage, tower footing resistance (TFR) and ground flash density (GFD) on the line lightning performance. In addition, several mitigation steps to improve the lightning performance are also recommended.
机译：电力线上的过电压是线路设计和雷电入射的函数。马来西亚的雷电发生数量是世界上最高的记录之一，这是我们无法控制的。但是，电源线的设计在工程师的控制之内。由于架空配电线路及其相关设备最容易因雷电而导致绝缘故障，并且在可靠性方面受到很大影响，因此，一项研究旨在确定线路的防雷性能，并针对中压架空配电线路分析可用的缓解措施。在本文中，将讨论使用市售软件进行仿真以确定所选线路的闪电性能。蒙特卡罗统计方法用于模拟雷电活动，而三维电几何模型则用于确定行程终止。还应考虑与附近物体的屏蔽。线性和非线性塔基阻力（TFR）表示，平衡地势，前导传播闪络模型是模拟中使用的标准功能。进行仿真以研究临界闪络（CFO）电压，塔基电阻（TFR）和地面闪络密度（GFD）对线路雷电性能的影响。此外，还建议采取一些缓解措施来提高雷电性能。

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