【摘要】 采用基于场路结合方法开发的接地网接地参数数值计算软件分析了接地网的接地阻抗与接地电阻的差 异。计算结果表明:接地电阻的概念只适用于小型接地网;随着接地网占地面积的加大以及土壤电阻率的降低,接地阻抗中感性分量的作用越来越大,大型地网应采用接地阻抗设计。更多还原

【Abstract】 Based on field-circuit coupling theory, a software of numerical calculation of grounding grids of large substation has been developed and is used to analyze the differences between grounding impedances and groundi ng resistances. The results show that grounding resistances can only be used to small grids. As the area increase or soil resistivity decrease, the inductive co mponents of grounding impedances become greater and greater. Grounding impedance should be used in the design of large substation grounding grids.更多还原