Lightning response of grounding grid buried in multilayered earth model based on quasi-static complex image method in time domain

A novel mathematical model for accurately computing the lighting currents along a substations' grounding grid buried in multilayered earth model has been developed in this paper. To accelerate the calculation, quasi-static complex image method and closed form of Green's function in time domain were introduced into this model. The model can calculate lightning currents distribution of a grounding grid, be used for study performance of transient lighting response to the grounding grid.