接地设计中两层土壤参数的优化计算

Optimum Calculation of Electric Grounding Parameters with Two layer Earth in Grounding Design

影响电力系统接地电阻的主要因素是接地体所在土壤的模型及参数。对水平分层的两层土壤，用温纳四电极法测得其视在电阻率，然后用非线性规划的单纯形优化方法，求出第一层土壤的厚度与两层土壤的电阻率。计算结果与实测数据一致。

The main factors which affect the earth resistance are the earth model and parameters where the grounding body is buried. The data of apparent resistivity was measured by the Wenner four electrode method, the earth thickness of the first layer and the resistivity of the two layers for the two layer earth horizontally layered are obtained by the simplex optimal method of non lineal programming. The calculating results agree with the measured data.