Simulation Analysis of Impulse Characteristics of Grounding Electrode in High Altitude Area

Abstract

In order to study the effect of the structure and material of the grounding electrode on the impulse grounding resistance in the soil condition of high altitude area, the soil model of a high altitude area was measured on site, and the influence of the structure and material of the grounding electrode on the impulse characteristics of the grounding electrode was studied by simulation analysis method. The results show that the impulse grounding resistance is the lowest when the Angle of ray is 45°. With the increase of the total length of the grounding electrode, the impulse grounding resistance decreases with the increase of the number of ray roots, and the effective impulse length exists.  The graphite type grounding electrode has better performance than the traditional metal grounding electrode, and the graphite based flexible grounding electrode can be preferred in the area of high soil resistivity. The addition of vertical grounding electrode can effectively reduce the impulse grounding resistance of horizontal grounding electrode, and the highest resistance reduction rate can reach 31.73%. The research results can provide some guidance for the design of grounding electrode in high altitude area.