Influence of soil and conductor of ground grid on safety of thegrounding system

摘要

The grounding system of a practical 500 kV substation, in whichthe ground grid is made from steel, is calculated by virtue of the CDEGSsoftware. The model of the soil is established based on the soilresistivity measurements. The safety of the grounding system isevaluated. The influence is analyzed of soil and conductor of groundgrid on the safety of the grounding system through large computationunder the condition of various soil resistivity, conductor permeability,and conductor conductivity. The influence of soil on the safety of thegrounding system is also analyzed when the ground conductor is assumedto be copper