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Abstract This study investigates the electric potential distribution near transmission line towers, focusing on the impact of contact voltage and step voltage on power system safety and personal safety. It establishes a model correlating contact voltage and step voltage with total human body current by analyzing key parameters of human electrocution accidents. Using finite element computational models, it accurately simulates the potential distribution of common tower grounding devices under fault currents, revealing distinct characteristics of potential distribution among different device configurations. The simulation reveals complexities in the potential distribution of square grounding devices with horizontal rays, proposing innovative suggestions to optimize grounding systems and reduce potential differences. Additionally, it analyzes current flowing through grounding devices under various fault conditions, highlighting potential risks of personal electrocution. Finally, the study proposes optimization schemes for electric potential distribution near transmission line towers’ grounding systems, offering crucial insights for power system safety and engineering design.
Hu et al. (Thu,) studied this question.