基于CDEGS软件的变电站接地主网网孔加密法研究

Research on Mesh Density Method of Main Substation Grounding Grid Based on CDEGS Software

变电站接地网的建设因受多种因素影响,是电力建设中的难题。基于CDEGS软件分析了接地网面积、水平接地极总长度等因素对接地网参数的影响,对当前主流的等间距及不等间距布置方案的优缺点进行了对比,结合工程实际因素与规程规范要求,提出网孔加密方法,并对其进行了仿真分析及工程实例应用。结果表明:网孔加密法取得了良好的效果,在工程运用中达到了改善接地主网参数性能的目标。

The construction of transformer substation grounding grid is a problem in the power construction because of the multifactor influences on the construction.Based on CDEGS software,this paper analyzed the grounding grid area and level grounding electrode total length etc factors’impact on grounding grid parameters and carried out the comparison for the relative merits between equal and unequal divisions layout plan of current mainstream.Combined the engineering practice factors with the regulation code requirements,this paper proposed the mesh density method and carried out simulated analysis with the engineering project applied.The results show that the mesh density method obtains good results,which realizes the object of parameter performance of main grounding grid in engineering application.