石墨烯复合接地装置在杆塔接地中的应用

Graphene Composite Grounding Device and Its Application in Tower Grounding Grid of Power Transmission System

针对高土壤电阻率、强腐蚀土壤环境下输电线路杆塔接地装置降阻困难、腐蚀严重、敷设不便等实际问题,应用一种接地新型材料—石墨烯复合接地装置,可有效解决上述问题。本文简要概述了石墨烯复合接地装置的组成及特性,对比分析不同土壤电阻率下镀锌圆钢、石墨基柔性接地体与石墨烯复合接地装置的工频与冲击接地电阻特性,计算分析工频故障电流通过接地装置散流时的跨步电位差分布特性,最后通过500 kV线路杆塔接地装置实际应用证明该材料可有效满足实际工程需求。

In allusion to the troubles that the existing metallic grounding material has to be faced such as the difficulty in reducing ground resistance,corrosion and the difficulty of laying,a new type of material,the graphene composite grounding device,can effectively solve the above problems.Firstly,the composition and characteristics of the graphene composite grounding device are described briefly.Secondly,the characteristics of power frequency and impulse grounding resistance of galvanized round steel,graphite based flexible grounding body and graphene composite grounding device under different soil resistivity are compared and analyzed,and the distribution characteristics of step potential difference when power frequency fault current diffuses through the grounding device are calculated and analyzed,And finally,through the actual application of a 500 kV line pole tower grounding device,the material can effectively meet the requirements of the actual project.