Discussion on Measurement of Grounding Resistance and Three-Dimensional Grounding Grid Technology
Abstract：With the increase of electric power system voltage level and the continuous improvement of the capacity of the system, the grounding resistance value is putting forward to higher requirements. And also the good substation grounding system is the fundamental guarantee for the safe operation of electric power system. In order to make sure that the grounding grid' s design can grantee safety of equipment and people at the areas of high resistivity soil and limit expansion region of grounding grid horizontal expansion, the vertical grounding electrodes is added. The new technology of three-dimensional network is adopted, which can effectively reduce grounding resistance of ground grid, touch and step voltage. The basic principle of grounding resistance measurement is analyzed. The three-electrode straight line method ( method 0. 618 ) and three-electrode triangle method (30 °angle method) of ideal grounding ball condition are discussed. These methods provide certain reference value for similar project.
Keywords：grounding resistancemeasurement principlemeasuring method3D grounding gridverticalgrounding electrode
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 68-73 )