Power Grid Corporation of India
Online published on 21 November, 2016.
The paper describes aspect of designing earth mat for GIS substations with high soil resistivity & limited area. The methodology, considerations & factors for designing earthmat has also been elaborated. The paper also describe a typical case study for design of earthmat with soil high resistivity and high fault current for 400/230 kV GIS Substation. A comparative analysis in results obtained by software & manual calculations for design of earthmat with high resistivity & high fault current is also elaborated in this paper.
Soil resistivity, Main Earthmat, grid resistance, conductors, potential distribution, gravel, touch potential, mesh potential, optimal, safe and economical Earthmat design, earth impedance
