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A new mathematical model for accurately computing currents along a grounding grid buried in a horizontal multi-layered earth model has been developed in this article, which is a hybrid of Galerkin’s method of moment and the conventional nodal analysis method; the propagation effect of an electromagnetic wave has been considered. The dynamic state complex image method and closed form of Green’s function of a dipole or monopole in the multi-layered earth model are introduced to enhance efficiency of the method calculation; meanwhile, an analytical formula for mutual induction and impedance coefficients calculation have been adopted to accelerate the calculation. Finally, some numerical results about the distribution of an electromagnetic field and currents along a grounding grid have been discussed, and some conclusions have been obtained.
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Li et al. (2015) studied this question.
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