Grounding System Analysis in the Frequency Domain

GENERAL DESCRIPTION

GSA_FD is based on a PEEC full wave numerical model and can be applied in general conditions with systems composed by many distinct electrodes of any shape, size and kind of conductor (solid, hollow or stranded and coated or bare) into a uniform, multilayer or multizone soil model in a large frequency range from DC to about 100 MHz. GSA_FD can also consider single core and multicores screened conductors. It is moreover important to consider that GSA_FD is able to takes into account the frequency dependence of soil parameters according to many models including Messier, Visacro - Portela, Visacro – Alipio and the model with a general consensus indicates in the CIGRE TB 781 2019.

The graphical (from “dxf” files or from the integrated CAD) and numerical input data, the optimised and validated computation algorithms, the powerful graphical facilities render GSA_FD an indispensable tool for grounding system design and verification, when the drop voltage on conductors cannot be ignored.

GSA_FD includes the module SRA to calculate uniform or multilayer soil model parameters starting from measured soil resistivity data.

GSA_FD can also consider a multizone sol model. A multizone soil model should be used when the size of the conductors network is so large than the horizontal soil resistivity changing are more significant than vertical variations.

GSA_FD is one of the most powerful and general software on the market for grounding system analysis and can be used to solve electromagnetic compatibility or interference problems due to resistive, capacitive and inductive coupling in the earth.

GSA_FD is also useful to calculate magnetic field due to grounding systems or buried cables and can be used to investigate the effectiveness of passive loop mitigation systems.

In DC conditions, GSA_FD can be used for the cathodic protection and anode bed analysis, with impressed current systems involving extensive coated and uncoated buried structure.