杆塔接地网接地模块降阻效率与影响因素研究

Resistance Reduction Efficiency and Influencing Factors of Grounding Module of the Tower Grounding Grid

输电线路杆塔接地网在外延、垂直接地降阻措施受限时常采用辅助降阻材料降阻,实际杆塔接地工程采用接地模块进行接地降阻时缺少统一规范的指导,在应用时存在一些盲目施工、降阻效率低等问题。本文采用防雷接地领域中通用CDEGS软件对输电线路杆塔接地网采用接地模块降阻时的影响因素进行仿真计算。首先,针对一字型接地网采用接地模块时的敷设位置和密度进行仿真;其次,对常见的方框射线型接地网采用接地模块降阻时的降阻效率进行分析;随后,分别分析了土壤电阻率与土壤结构对接地模块降阻效率的影响规律;最后,针对实际输电线路采用接地模块降阻给出相应施工建议。本文研究结论可为输电线路防雷、杆塔接地网降阻施工提供参考。

The auxiliary material is often used to reduce the resistance of transmission line tower grounding grid for the limitation of the extension and vertical grounding resistance reduction measures. For the lack of unified standard guidance when grounding modules are used in the actual tower grounding project, some problems occurred in application such as blind construction and low reduction efficiency. In this paper, the common lightning protection software CDEGS is used to simulate and calculate the influencing factors when grounding module is used to reduce the resistance of transmission line tower grounding grid. First of all, simulation is carried out for the laying position and density of the grounding module in the shaped grounding grid. Secondly, the efficiency of grounding module in the grounding grid is analyzed through the simulation. Then, the influence rule of soil resistivity and soil structure on the grounding module reduction efficiency is analyzed. Finally, the corresponding construction suggestions are given for the actual transnfission line using grounding module to reduce the resistance. The conclusions of this paper can provide references for the lightning protection of transmission lines and the construction of the grounding grid of towers.