This article analyzes the performance of grounding systems buried in the ionized soil during the lightning discharge. To this aim, at first, a method to simultaneously analyze the transient response of grounding system considering the time-dependent nonlinear behavior arising from soil ionization and frequency dependence of soil electrical parameters related to the frequency content of the lightning surge is presented. The proposed method is performed by a combination of the harmonic balance method and the method of moment, which is aimed at representing an equivalent circuit to model the grounding system during the lightning discharge. The proposed model is validated by comparing the associated results with the published measurement and the numerical data for different grounding systems. Finally, an application of the proposed method is presented and the generated overvoltages across the insulator string caused by lightning strokes, the outage rates of transmission lines, and the lifetime of surge arresters are discussed.

中文翻译：

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考虑接地系统中土壤电离和频率相关特性的输电线路雷电相关应力分析

本文分析了雷击放电过程中埋在电离土壤中的接地系统的性能。为此，首先，提出了一种同时分析接地系统瞬态响应的方法，该方法考虑了土壤电离引起的时间相关非线性行为和与雷电浪涌频率内容相关的土壤电参数的频率相关性。所提出的方法是通过谐波平衡法和力矩法的组合来执行的，其目的是表示一个等效电路来模拟雷击放电期间的接地系统。通过将相关结果与公布的测量结果和不同接地系统的数值数据进行比较，对所提出的模型进行了验证。最后，