Abstract
This paper discusses an equivalent circuit to consider the frequency dependence of soil parameters. The paper describes a calculation method of the constants of the equivalent circuit. Calculated results using the equivalent circuit considering the constants agree well with experimental results. The equivalent circuit can consider the frequency dependence and the current dependence of grounding resistance simultaneously. Thus, the equivalent circuit is very useful for lightning surge analysis. An influence of the frequency dependence of soil parameters on the current dependence of grounding resistance is discussed using the equivalent circuit.
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