The New Grounding Technology Application In HuangJingBao Substation

The substation grounding system is ultimate insurance and step which ensuring power system run safely, protecting the safe of stuff and instructions, the design of grounding system is one of the most importance electric design.Commonly, the grounding system of a power plate or substation is a closed grid within equalizing voltage conductors. The conductor is arranged with space between 3m,5m,7m,10m, which cause the surface voltage distributing unequal. The center grid hole voltage is higher than the border. According theory analysis, calculating and testing, disposing conductor by making space increasing from grounding grid center to border can reduce the unequal of surface voltage distributing, which also can reducing conductor and project cost. The article researches the conductor unequal space distributing linking HuangJingBao substation grounding grid rebuild project, gets the optimize scheme through lot of design calculating using GPC (Grounding Parameter Calculating)software. By using unequal space scheme, the grounding resistance, tough voltage, step voltage are decreased, the conductor and cost are economized.With the time goes, the buried conductor will become miner even rupture because rusting in the grounding grid, which cause safety hidden trouble, the phenomena also be find in HuangJingBao substation grounding grid. Research indicates electric concrete is a good king of protect rust material, the article researches the protect mechanism of electric concrete, analysis the impossibility of its using in HuangJingBao substation, affords experience for the project using.Centralizing grounding equipment can decrease effectively the resistance on the high soil resistivity areas. Through the projecting using, the article analysis the complex grounding grid resistance make up of conductor and centralizing grounding equipments.In the HuangJingBao grounding grid project, researches distributing unequal space, the protect mechanism of electric concrete, put forward the new method of designing grounding grid, validates the technical and economics impossibility.