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This article discusses the design of a power station earthing system using two methods that are compared to each other. The design was based on the software method using CYMGRID and the mathematical method based on IEEE 80-2000. The process in both methods is aimed at creating a grounding model, determining the overall resistance, overloading the cross-sections of the earthing switches and adhering to the limit values for the touch and step potential. The work compares these analyses and evaluates the differences in design and possible shortcomings, such as the possibility of over-dimensioning or underestimating the grounding system.

The article deals with the research of devices used to improve the transient stability of the power system. It refers to current global electricity trends, leading to ever-increasing electricity transmission. This is due both to the increase in consumption and production of electricity, as well as to the creation of a single electricity market. Recently, there is an increasing problem of the operation of renewable resources with unpredictable production, which also often contributes to the creation of unplanned transit flows and to the deterioration of system stability.