A non-homogeneous Dirichlet boundary condition on the electric potential for the finite element analysis of grounding systems

A procedure to take into account the unbounded nature of the three dimensional domain employed in the finite element analysis of grounding systems is presented. It consists in applying non-homogeneous Dirichlet boundary conditions on the electric potential calculated according to a point current source approximation. The numerical scheme was tested in an example, and showed very good agreement with the solution given to the same problem by an integral method.