中文摘要：

针对电力系统变电站接地网现行的铜、钢以及铜包钢等金属接地材料接地特性的不同,对比分析了铜、钢及铜包钢接地材料的使用成本及腐蚀特性.通过计算对比分析不同土壤条件和不同接地面积下,铜、钢及铜包钢接地网的接地电阻、网内电位差、接触电压以及跨步电压的不同特征.本文所做工作为变电站接地网的材料选择及优化改造提供参考.

英文摘要：

In the light of the different behavior of metal grounding materials including copper,steel,copper-clad steel,the paper gives a comparative analysis of corrosion property and the cost of the above grounding material,and calculates the parameters with ground resistance,network potential difference,contact voltage and step voltage under different soil and grounding radius condition.According to the calculation results the paper proposes some optimization measures for the grounding grid in substation,providing a reference for the selection of the grounding material and the optimization of substation grounding grid.