Initial Results on the Two-Layer Inclined Soil Model in MultiFields

This work presents the development and validation of an inclined (dipping-bed) soil model that extends electromagnetic field calculations to environments containing two soil regions separated by a sloping interface in the MultiFields HIFREQ computation module. The formulation combines analytical solutions of Maxwell’s equations with spectral-domain Green’s functions to accurately represent electromagnetic behavior in two-layer inclined soil structures. Comprehensive verification studies demonstrate excellent agreement with existing SES computational tools across a wide range of frequencies, soil properties, and interface geometries. The results confirm the accuracy and numerical stability of the approach for calculating electromagnetic quantities in inclined soil environments. This development significantly expands the modeling capabilities available for grounding-system analysis in realistic terrains, while ongoing efforts aim to further improve computational efficiency and extend the methodology to complex conductor networks and large-scale installations.

Comparison of the MultiFields (left) and the MultiGroundZ (right) inclined soil models when dipole source is on the left layer (top) and on the right layer (bottom).
The inclination angle is 45°.

See the article entitled “Initial Results on the Two-Layer Inclined Soil Model in MultiFields” in these Proceedings for further details.