【摘要】 从三维有限元用于分析接地网特性出发,提出了将一维有限元与三维有限元耦合起来分析地网特性的新方法。应用三维有限元及一维有限元与三维有限元耦合法分别对某变电站接地网的接地电阻进行了计算。计算结果表明,该方法在保证计算精度的前提下减少了剖分后的单元数量、提高了计算速度,从而拓展了有限元法在大型接地网特性分析中的应用。更多还原

【Abstract】 Proceeding from the characteristics analysis of grounding mesh by three dimensional finite element method (FEM), a new characteristics analysis of grounding mesh by unidimensional FEM coupled with three dimensional FEM is proposed. The grounding resistance of a certain substation is calculated by three dimensional FEM and that coupled with unidimensional FEM respectively, the calculation result shows that with the proposed method, the number of dissected units is reduced and the calculation speed is obviously fastened under the condition that the calculation accuracy is adequately ensured, therefore the application of FEM in large scale grounding mesh is widened.更多还原