发变电站中人脚对大地接地电阻的计算

calculation of Ground resistance of the Foot in Substation Yards

通常在发变电站铺设一层厚度为５－２０ｃｍ砾石或沥青混凝土路面，该层路面对人脚对大地的接地电阴Ｒｆ有较大影响。本文基于双层土壤模型，提出了Ｒｆ的精确计算方法，并给出了准确度很高的简化计算公式，可供工程实际应用。

There is a gravel Layer in substation yards . The ground resistance of the foot R f is affected by the limited depth of the gravel layer. This paper presents a accurate method to calculate R f based on two - layer soil model. A simple empirical equation for determining the value of Rf is also presented and can be used for practical dessign propose.