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首页> 外文期刊>Electric power systems research >The influence of lightning conductor radii on the attachment of lightning flashes
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The influence of lightning conductor radii on the attachment of lightning flashes

机译：避雷针半径对雷电附着的影响

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摘要

The influence of the tip radius of lightning conductors on their lightning attractive distance as predicted by the self-consistent leader inception and propagation model (SLIM) is presented. The results show that in the absence of any glow corona from the tip of the conductor a smaller tip radius gives rise to a larger attractive radius than a larger radius. It is suggested that the reason for the experimental observations which show that blunt conductors are more efficient lightning receptors than sharp ones is the presence of glow corona at the tip of the sharp ones during the time of lightning strikes. Moreover, in a given background electric field, the probability of the inception of glow corona at the conductor tip increases with increasing conductor height and decreasing conductor radius. Thus, in a given electric field, as the conductor height increases its radius has to be increased to avoid the inception of glow corona at the tip. For this reason, the conductor radius that performs best as a lightning interceptor depends on the height of the conductor and the best performance shift from smaller radii to larger ones with increasing height of the conductor. (C) 2017 Elsevier B.V. All rights reserved.
机译：提出了自洽领导者始发和传播模型（SLIM）预测的避雷针尖端半径对其避雷距离的影响。结果表明，在导体尖端不存在任何辉光电晕的情况下，较小的尖端半径会比较大的半径产生更大的吸引力半径。建议进行实验观察的原因表明钝的导体比锋利的导体更有效，是因为在雷击期间，锐利的尖端存在辉光电晕。此外，在给定的背景电场中，随着导体高度的增加和导体半径的减小，在导体尖端处出现辉光电晕的可能性也随之增加。因此，在给定的电场中，随着导体高度的增加，其半径必须增加以避免在尖端出现辉光电晕。因此，用作避雷针的导体半径最好取决于导体的高度，并且随着导体高度的增加，最佳性能会从较小的半径变为较大的半径。 （C）2017 Elsevier B.V.保留所有权利。

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