Overvoltages on a Photovoltaic Park Grounding System Exposed to Lightning Strike

2022 36th International Conference on Lightning Protection (ICLP) Pub Date : 2022-10-02 DOI:10.1109/ICLP56858.2022.9942481

Despoina Koukoumpa, K. Koutras, G. Peppas, I. Naxakis, E. Pyrgioti

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引用次数: 1

Abstract

The subject of this study is the overvoltages developed during lightning events on the grounding system of a photovoltaic (PV) park located in Western Greece. Through modeling in the A TP - EMTP software, the transient response of the earthing system of the solar park under consideration is assessed for two scenarios of lightning strikes. The efficiency of the grounding system is simulated with respect to different lightning entries; from the side and the middle of the PV park while the influence of the soil ionization is also understudied. Furthermore, the grounding system with the soil ionization modelling under consideration, for Case A, is used to estimate the step voltages as a function of the distance from the lightning strike entrance point. Lastly, a comparison is conducted regarding the highest values of induced voltages recorded for Case A, taking into account the IEC 62305–1 and positive CIGRE 200 kA 10/350 μs. From the obtained results, it is clear that personnel is not safe until a distance of 3 m away from the strike.

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雷击下光伏公园接地系统的过电压

本研究的主题是位于希腊西部的光伏(PV)公园的接地系统在雷电事件期间产生的过电压。通过在A TP - EMTP软件中建模，对两种雷击情景下考虑的太阳能园区接地系统的暂态响应进行了评估。针对不同的雷击入口，模拟了接地系统的效率;同时，对土壤电离的影响也进行了研究。此外，在考虑了土壤电离模型的接地系统中，对于情况A，使用阶跃电压作为距离雷击入口点的距离的函数来估计。最后，在iec62305 - 1和CIGRE正电压200ka 10/350 μs的情况下，对Case a记录的感应电压最大值进行了比较。从获得的结果来看，很明显，人员在距离打击点3米的距离内是不安全的。

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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2022 36th International Conference on Lightning Protection (ICLP)

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