Lightning Risk Assessment of a Distribution Line by Excluding a Grounding Wire and Current-Limiting Arcing Horns

中国防雷 Pub Date : 2021-09-20 DOI:10.1109/ICLPandSIPDA54065.2021.9627339

S. Yasui, Masakazu Tanida, Masaya Nakagawa, Hirokazu Uenishi, Y. Kunii, Yuki Kanazawa

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Abstract

We need measures to establish a reasonable lightning protection design for medium-voltage distribution lines, which can reduce the capital investment costs and ensure protection against lightning strikes. We will adopt two measures to reduce the capital investment costs of the lightning protection. Firstly, removing GW from new construction or renovation of distribution lines to reduce accidents caused by the fatigue disconnection of GW. Secondly, excluded the currently installed middle-phase arcing horns for the new distribution lines to reduce the maintenance cost of the lightning arresters within the arcing horn. However, the probability of a multi-phase flashover increased when the middle-phase arcing horn was excluded in all the medium phases in the twisted distribution line. In this study, we investigated the measures to improve the lightning protection performance of medium-voltage distribution lines that omitted middle phase arcing horn using the typical distribution configuration. We confirmed to greatly reduce the risk of lightning strikes by leaving the support bracket with the grounding line when removing the GW.

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排除接地线和限流弧角的配电线路雷电风险评估

我们需要采取措施，建立合理的中压配电线路防雷设计，以降低资本投资成本，保证防雷。我们将采取两项措施，降低防雷的资本投资成本。首先，在新建或改造配电线路时拆除GW，减少GW疲劳断线造成的事故。其次，在新建配电线路中省去了目前安装的中相电弧角，降低了电弧角内避雷器的维护成本。而在扭曲配电线路中所有中相均排除中相电弧角时，多相闪络的发生概率增大。本研究以典型配电配置为例，探讨了对省略中相电弧喇叭的中压配电线路提高防雷性能的措施。我们确认在拆卸GW时，将支架与接地线分开，可以大大降低雷击风险。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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中国防雷

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