Analysis of grounding electrode input impedance calculation

The paper deals with an assessment of transient impedance of the grounding electrode. The mathematical model is based on the thin wire antenna theory and related Pocklington integro-differential equation in the frequency domain, which is numerically treated via Galerkin-Bubnov variant of indirect Boundary Element Method (GB-IBEM). Two different approaches for transient impedance are discussed in detail. Extensive numerical experiments have been undertaken and some of the illustrative numerical results are presented in this paper.