优化方法在变电站接地网中的应用

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，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，减小了边缘导体泄漏电流，改善了土壤表面的电位分布。明显提高接地系统的安全性。

Optimum design of grounding grids of substation

Based on unequipotential 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.