基于CDEGS的双层接地网仿真研究

Simulation of Double Layer Grounding Grid Based on CDEGS

由于土地资源日益紧缺,变电站占地面积越来越小,仅仅依靠单一的水平接地网很难在变电站站址范围内构造出满足要求的接地。在南方丘陵地区,对一些建在推土、垫土等山坡地带的变电站,利用小山坡,凹地构建双层地网,充分利用变电站区域,有效的降低变电站接地电阻,同时也能解决由垫土层形成的双层土壤的亲和问题。对双层接地网与垂直接地极进行仿真比较,并通过仿真分析了江门某换流站的双层接地网设计,提出了在土壤结构复杂、接地面积小的地方实现最优的接地选择,因此对双层接地网在山地、丘陵和上坡等特殊环境的研究具有一定的意义。

Due to the increasingly scarce land resources, the substation area is becoming smallerand smaller, relying solely on the level of the single grounding grid is very difficult in the range ofsubstation position is constructed to meet the requirements of the grounding. In hilly area of SouthChina, some built bulldozing, pad soil slopes in the substation, the hillside, concave to theconstruction of double layer grounding grid, make full use of regional substation, effectively reducessubstation grounding resistance, also the Affinity problem of the double layer caused by the pad layercan be solved. Based on the comparing and simulating between the double grounding grid and verticalgrounding electrode, and through the simulation analysis of the JiangMen on double grounding griddesign, this paper puts forward how to achieve the optimal choice in the area of soil structure complex,and small grounding area, so the double grounding grid research in the special environment ofmountainous, hilly and uphill is of great significance.