Studies on Grounding Technologies for Power System in China

Abstract

The problems related to grounding systems of substations and power plants include geological structure analysis of substation site, the precise design of grounding system, the technology to decrease grounding resistance of substation in high soil resistivity area, corrosion diagnosis of grounding system, precise measurement of grounding resistance of substation, and impulse characteristics of grounding devices. Up to present, these six aspects related to grounding technology of power system have been widely studied, and achieved satisfied results in China. These achievements were systematically introduced in this paper.