异质土壤对地网接地电阻的影响

Effects of Heterogeneous Soil on Grounding Resistance of Grounding Mesh

分别讨论了异质土壤电阻率、截面积以及深度对地网接地电阻的影响。通过仿真研究得出:异质土壤电阻率越大,其对地网接地电阻的影响越小;异质土壤横截面积小于地网面积的10%时,其对地网接地电阻的影响可忽略,否则,需考虑其影响;在一定的深度范围内,异质土壤越深,其对地网接地电阻的影响越大。

The influences of sectional area, depth and specific resistance of heterogeneous soil on grounding resistance of grounding mesh are respectively analyzed. Simulation results by famous international grounding analysis software CDEGS show that the higher the specific resistance of heterogeneous soil is, the less its influence on grounding resisatance of grounding mesh is; when the sectional area of heterogeneous soil is less than 10% of the area of grounding mesh, its influence on grounding resisatance of grounding mesh can be ignored, otherwise, its influence should be taken into account; within a certain range of depth, the larger the soil thickness is, the more evident its influence on grounding resisatance of grounding mesh is.