Abstract
This paper describes the theoretical, simulation, and experimental investigations of the surge response of a vertical conductor, including the effects of ground surface and without ground surface. One of the authors of this paper derived the formula of the surge impedance in the case with ground surface and without ground surface. In this research, these theoretical formulas are examined by simulation analysis of the vertical conductor using the Numerical Electromagnetic Code (NEC-2) as well as on an experimental basis. The arrangement of the current lead wire in the vertical conductor model to be analysed here is verified with the simulation result of the equivalent circuit model by the Electromagnetic Transients Program (EMTP).
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