Assist. Prof. Eng. Dragos MACHIDON, Prof. Eng. Marcel ISTRATE PhD, Prof. Eng. Mircea GUSA PhD, Eng. Marian DRAGOMIR PhD
Rezumat
Metoda sferei fictive este una dintre cele mai folosite tehnici pentru dimensionarea sistemelor de paratrasnete
din statiile de transformare. Desi frecvent utilizata, aceasta metoda ignora o serie de parametri cu o importanta semnificativa in procesul de orientare a liderului descendent catre obiectele de pe sol, astfel incat zonele de protectie determinate au dimensiuni nerealiste. Pe baza unor rezultatele experimentale de data recenta, in aceasta lucrare este
propus un model eliptic pentru determinarea zonelor de protectie a sistemelor de paratrasnete verticale.
Cuvinte cheie: trasnetorientaresfera fictivamodel eliptic
Abstract
Rolling sphere method is nowadays one of the most popular methods used for dimensioning the lightning rod
protective system of power stations. Although very used, this method neglects some of the most important parameters of the lightning attachment process to grounded objects thus resulting unrealistic dimensions of the protective zones. Based on recent experimental studies in this paper an elliptical model is proposed in order to estimate the lightning rods’
protection zones.
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