摘要: This paper presents a vertical grounding mesh to transmission line (TL) towers for use in two-layered soils, where the second-layer has a lower resistivity compared to the first. To a better knowing about its behavior, a compariso... 展开 This paper presents a vertical grounding mesh to transmission line (TL) towers for use in two-layered soils, where the second-layer has a lower resistivity compared to the first. To a better knowing about its behavior, a comparison with horizontal arrangement composed by counterpoise cables, for critical soils from a 230 kV TL, is realized focusing in impulse coefficient parameter. A first analysis of the procedure based on TL-theory with electromagnetic (EM) method is made and an evaluation of homogenous soil for the arrangements is realized. The results indicate a lower grounding resistance and impulsive impedance for the proposed vertical option compared to horizontal arrangement, using much less conductor material and presenting a margin to reduce such parameters due to the distance to effective length. 收起