SIMULATION OF FAULT CURRENT DISTRIBUTION IN GROUNDING GRID BY FEM

摘要

A novel method, which is based on electromagnetic field theory, to calculate the current distribution in grounding grid is presented in this paper. The finite element method (FEM) is used to calculate the distribution of the fault current in the grounding grids. By using both of the unidimensional units and the three-dimensional units in modeling the grounding grid and its surrounding soil, the performance of the real substation grounding grid can be analyzed. The current distribution in the grids as well as its distribution in the surrounding soil can be seen clearly. The accuracy of the calculation is improved a lot and both of the current flowing in the grids and the leakage current distributed in soil can be easily obtained under different condition.