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The paper presents a study based on numerical simulation methods of electrical circuits which analyzes the influence of the internal protection elements of the transformer on atmospheric surges. The difference between the time variation curves of the overvoltages propagated during the high voltage winding with and without guard ring is shown as an internal protection element of the transformer.

The paper presents a study related to the methodology for evaluating the wind potential of a chosen location, with the help of modern software solutions for analysis and specialized design. The values presented in the study show the differences in the efficiency of wind farms depending on their location, the available input data package and their accuracy being a determining factor in the quality of optimization and design of the wind farm.