Numerical simulation of substation grounding grids buried in both horizontal and vertical multilayer earth model

In the simulation of quasi-static electromagnetic fields produced by a point source located in both horizontal and vertical multilayer media, the conventional image method requires an infinite number of images to get an accurate solution, while the method of quasi-static complex images needs only a few ones. Based on the method of quasi-static complex images, the closed form of Green’s function of a point source in both horizontal and vertical multilayer earth model is derived through matrix pencil (MP) approach. The fast convergent Galerkin’s type of boundary element method (BEM) is taken to simulate and analyse a grounding system including floating electrode with any complicated structure, which can be located anywhere in horizontal or vertical multilayer earth model. Copyright q 2006 John Wiley & Sons, Ltd