Abstract

In the paper, first it is said in general what is meant by grounding system, the need for protection as well as the consequences in case of overvoltage. The procedure for solving a complex grounding system at overhead lines is further presented, with the manner of exact modelling of a real overhead power line. In the main part, by applying the already mentioned procedure on a real example of the transmission power line Bitola - Prilep through a developed application in MATLAB, the grounding system will be solved in case of short circuit on the towers. Finally, the step and touch voltages will be presented and a conclusion will be made whether those values are within the normal range.

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