Influence of the grounding Electrode on transient grounding resistance under pulsed discharging current

The influence of the variations of grounding electrode in volume, surface area, conductivity and permeability on transient grounding resistance (TGR) under pulsed discharging current is analyzed with FDTD method in this paper. From the computation results, some useful conclusion can be got as follow: the grounding electrodes with the same surface area have nearly the same TGR. For the grounding electrodes with the same volume, the larger the surface area is, the smaller is the TGR. Nonmetal grounding electrode, whose conductivity is high enough, has the same discharging effect as the metal. The permeability of grounding electrode has little influence on TGR