Grounding system of electric power plant analysis

Dear,

I would like to develop a model of the grounding system of the electric power plant.

I need to analyze the electric field and current field in the ground of that plant.

Please, let me know if it is possible to do this with software and if someone has already done it, if they have an example somewhere.

Also, if anyone can help me with the model please let me know.

Thank you in advance.