Research on Resistance Reduction Strategy of Terminal Tower-level Connection Ground in Adjacent Substation
In the terminal tower grounding grid near the substation,the grounding area of the terminal tower grounding grid is limited,the grounding resistance is high,and the metal grounding material is easy to corrode,so the terminal tower cannot be effectively grounded.In order to solve the above problems,the application of flexible graphite grounding material in terminal tower grounding grids is studied by using finite element software,and the strategy of cascade grounding resistance reduction under a limited area is proposed,and the grounding characteristics are compared with other grounding resistance reduction types.The simulation results show that the flexible graphite grounding grid can reduce the grounding resistance slightly under the traditional grounding structure.Under the same conditions,with the increase of soil resistivity,the resistance reduction efficiency and shunt coefficient of the cascade grid increase gradually,while the other resistance reduction types of the grid basically do not change.With the increase of the length of the grounding pole,the resistance reduction efficiency and shunt coefficient of the three types of grounding grids are gradually increased,and the resistance reduction efficiency of the cascade grounding grid is always higher than that of other grounding grids.It can be seen that the cascade grounding grid can effectively reduce the grounding resistance and improve the scattering efficiency of the grounding grid.
flexible graphitelevel connection groundgrounding resistance reductionfinite element
万方数据
维普
