After creating the model, you can observe effects of different fault current magnitudes applied to the grid and identify areas where touch and step voltage potential thresholds are exceeded (see Earthing Calculation - Touch and Step Potential Criteria. It has a straightforward graphical user interface (GUI) allowing quick and simple modelling of ground grids. WinIGS is software for 'Integrated Grounding System' (IGS) analysis.
This article provides a list of the most common software packages used for power systems analysis, and surveys both commercial and non-commercial software (listed in alphabetical order by vendor name).
Initially, they were used to quickly solve the non-linear load flow problem and calculate short circuit currents, but their use has been extended to many other areas such as power system stability, protection and coordination, contingency / reliability, economic modelling, etc.
Power systems analysis and simulation software are ubiquitous in electrical engineering practice.