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Design Scheme of Shared Tower Grounding Network Based on Uniform Ground Potential

The grounding standard of mobile base station in shared tower is relatively strict, so it is necessary to transform the grounding network of traditional transmission tower to meet the grounding requirement of base station. In this paper, the method of field-circuit coupling is adopted to treat the ground conductor in sections, calculate the self-resistance and cross-resistance of each section conductor, derive the solution formula of ground potential of grounding grid of shared tower, and then judge the uniformity of ground potential of grounding grid. Referring to the existing grounding standard of power and communication, the design idea and 4 design schemes of shared tower grounding grid are put forward. The results show that the ground potential distribution is the most uniform and the maximum potential gradient is 43.83% lower than that of the simple plan of expanding the area of the ground network.