CURRENT DISTRIBUTION OF GROUNDING GRID CONDUCTORS BURIED IN TWO-LAYER SOIL SYSTEM

Abstract

For safety and stable operation of electrical system purposes, grounding grid has been used. The current distribution of such grounding grid conductors is more likely calculated by analytical or numerical methods. This paper presents a new contribution to obtain the current distribution of grounding grid conductors with and without vertical rods buried in two-layer soil. The two-layer soil model has been simulated mathematically using two suitable values of resistivity. The indicated results of this paper give the current distribution for each segment of each mesh with and without driving rods. The effect of vertical rods, which has connected to horizontal grounding grid on current distribution and grounding resistance, has been studied. For increasing the flexibility of current distribution calculations of grounding grids, per unit system has been used in this paper. An experimental model to simulate two-layer soil is presented for the validation of the calculated results.