Efficient method for calculating the grounding resistance of a buried grounding grid in a homogeneous soil

The grounding resistance of grounding grid conductors is calculated based on Galerkin´s moment method. This method, due to its error reduction property, yields a high accurate resistance values for the parallel and perpendicular grounding conductors. The integral of the effective distance between the perpendicular conductors converged quickly and enabled us to use small resistance matrix size (NXN) for ground grid made of N conductors. The outcome of the present technique is compared with the published values (from sophisticated analysis and using supercomputers) and the agreement is very good