Analysis of the influence of grounding material´s property on the performance of grounding grids

In this paper, a numerical method coupling moment method with circuit theory is used to analyze the influence of the grounding material´s property on the performance of grounding grids. It can be seen that for a large grounding grid, when the soil resistivity is small, the influence of both resistivity and permeability of grounding material on the performance of grounding grids is great. If the frequency is not very high, the grounding material´s resistivity can affect the performance of the grounding grid obviously. If the frequency is very low or very high, the effect of the grounding material´s permeability on the performance of the grounding grid is small, while the effect is obvious at other frequency.