This paper discusses design method for grounding grid of wireless communication system in well field of Jing′an oil field,analysis on several problems of laying grounding grid,giving its solutions for the principle.

By using frequency changing technology in ground resistance measurement for grounding grid in Hanchuan Power Plant,the measurement result of ground resistance is obtained.

The theoretical value of ground resistance of semi-spherical grounding grid in uniform soil and its scale coefficient K of measured value by three electrode angle method are analyzed by making curves.

Through the excavation and inspection of grounding net in Shuibei substation, it was found that the corrosion of grounding net was very serious.

The paper introduces the experience of reducing ground resistances of distribution transformers in mountain areas of Lianyungang by way of research on formal design of ground grid,combined with usage of physical resistance-reduction additives.

According to the electromagnetic theory, a new method of the numerical calculation of resistance of the ground grids is developed.

There are shortcomings of high earthing resistance values due to a geing in the earthing network of the 110 kV substation.

In the numerical algorithm of the calculation of substation grounding grids resistance, the conventional procedure is to first calculate the fault current of every element and then obtain the total fault current of the grid and achieve the grid resistance.

Influence of ground screen on vertical dipole antenna;