Study on Effect of Grounding Module on Grounding Resistance

The components of non-metallic grounding module and mechanism of resistance reduction was described.The regular pattern of grounding resistance at variation of number and fitting location of the grounding modules,grounding grid area and soil resistivity was analyzed using grounding grid simulation.The maximum current occured at edge corners of grounding grid at current scattering,so the grounding modules shall preferably installed at edge corners.The resistance reduction effect of the same modules differs with the same grounding modules,the less the grounding grid the better effect obtained.Shield effect may occur between grounding modules which reduces resistance reduction.The higher the soil resistivity,the better the resistance reduction effect of grounding modules.The reduction rate of grounding grid resistance using grounding modules is the same at different soil resistivity.