其他摘要：Analysis and design of substation grounding requires computing the distribution of potential on the earth surface -for reasons of human security- and the equivalent resistance of the earthing system -for reasons of equipment protection- when fault conditions occur [1]. A new Boundary Element approach for the numerical computation of substation grounding systems in nonuniform soils is presented in this paper. The formulation is specially derived for two-layer soil models, which are widely considered as adecquate for most practical cases. The feasibility of this BEM approach is demonstrated by solving a real application problem, in which accurate results for the equivalent resistance and the potential distribution on the ground surface are obtained with acceptable computing requirements.
