This work presents the mutual influence of nearby grounding structures on each other in terms of safety parameters. To epitomise mutual influence, primarily a mathematical model of the double circuit transmission line, cling to the tower, close by a substation is considered. The model estimates the ground fault current venting into the encompassing soil, in case of single-phase to ground fault at the tower, when mutual resistive effects of both groundings are taken into account and when they are ignored. Neglecting these effects leads to a false estimation of safety parameters such as ground-fault current and touch voltages, which are frequently used in grounding design. It may lead to unnecessary expenditures on the safety design of the grounding system. For verification purposes, the practical application of the model is exhibited. Also, an interactive model between substation grounding (grid model) and nearby tower grounding (rod model) is examined in terms of safety parameters. To further validate, an experimental set up is built for two nearby groundings. Experimental results obtained through it are compared with the results of the finite-element method and analytical method and are found to be favourable. Touch, step, and ground potential distribution profiles with and without considering nearby grounding are also presented.

中文翻译：

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通过估计安全参数评估彼此接近的接地的相互影响

这项工作就安全参数而言，提出了附近接地结构相互之间的相互影响。为了体现相互影响，主要考虑双子输电线路的数学模型，该模型紧贴在变电站附近的塔上。如果考虑了两个接地的互阻效应，而忽略了它们之间的相互影响，则该模型将估算塔中的单相接地故障情况下，接地故障电流排放到周围土壤中的情况。忽略这些影响会导致对安全参数的错误估计，例如接地设计中经常使用的接地故障电流和接触电压。这可能会导致不必要的接地系统安全设计支出。为了验证目的，展示了该模型的实际应用。也，根据安全参数检查了变电站接地（网格模型）和附近的塔式接地（杆模型）之间的交互模型。为了进一步验证，为附近的两个接地建立了实验装置。通过它获得的实验结果与有限元法和分析法的结果进行了比较，被认为是有利的。还提供了考虑和不考虑附近接地的触摸，阶跃和地面电势分布曲线。通过它获得的实验结果与有限元法和分析法的结果进行了比较，被认为是有利的。还提供了考虑和不考虑附近接地的触摸，阶跃和地面电势分布曲线。通过它获得的实验结果与有限元法和分析法的结果进行了比较，被认为是有利的。还提供了考虑和不考虑附近接地的触摸，阶跃和地面电势分布曲线。