Abstract
In view of the current corrosion of metal grounding materials and the low degree of soil adhesion, this paper proposes a modified silicate composite grounding body, which is coated with metal materials by modified silicate materials mainly adding carbon fibers and made by high pressure extrusion, the modified silicate material was analyzed for its micro-morphology and characteristics, and further introduces its structural design and calculation method of ground resistance. Given the typical box-ray grounding device for 220kV transmission line power and its ground resistance requirements under different soil resistivity, CDEGS is used for simulation calculation to get the number of grounding electrodes and ground resistance that meet the standard requirements. It was found that the modified silicate composite grounding is effective in grounding system for lightning protection.
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