变电站接地网优化设计  

Optimum Design of Grounding Grids of Substation

作　　者：谭春力[1] 常树生[1] 唐雷[1] 董跃周 周晓虎[1] 

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012 [2]南方电网超高压广州局,广东广州510405

出　　处：《东北电力大学学报》2007年第6期66-70,共5页Journal of Northeast Electric Power University

摘　　要：在不等电位数学模型下,以网内最大接触电压差为目标函数,使用接地网工频参数计算软件得到了一种均匀土壤结构下接地网导体最优布置方案。优化结果表明,与DL/T621-1997中给出的接地网不等间距布置相比较,故障电流入地点处导体得到了充分利用,相应地减小了边缘导体泄漏电流,改善了土壤表面的电位分布,使接地系统的安全性得到明显提高。Basod on unequipotenfial model, the optimum design of grounding grids of substation in uniform soil is obtained by the computing software of grounding parameters of grids in industry frequency, in which the object function is the maximum difference of contact voltage in grounding grids. Optimal results show that grounding conductors are used fully on the fault current point and the leakage current of edge conductors are decreased, comparing with unequal spacing design in DL/T621-1997. The potential distribution in the soil surface is improved and the safety of the grounding grids is obviously increased.

关 键 词：接地网 优化布置 电位分布 接触电压 均匀土壤 

分 类 号：TM835.4[电气工程—高电压与绝缘技术]