Prof. Eng. Marcel Istrate, PhD, Assist. Prof. Eng. Dragos Machidon
Rezumat
Lucrarea abordeaza comportarea liniilor aeriene de 400 kV la lovituri directe de trasnet. Regimurile tranzitorii
generate de lovituri directe de trasnet in elementele liniilor sunt analizate cu ajutorul simularilor in ATP-EMTP. Conturnarea izolatoarelor a fost simulata cu ajutorul caracteristicii tensiune-timp a acestora, precum si prin folosirea unei abordari
particulare a modelului liderului progresiv. S-a efectuat o analiza comparativa intre rezultatele obtinute prin simulare si cele
obtinute prin modelele matematice clasice in ceea ce priveste curentii de protectie si numarul specific de deconectari.
Cuvinte cheie: trasnetconturnareATPlider progresiv.
Abstract
Several aspects concerning 400 kV overhead lines` behaviour on lightning direct strokes are presented. The
transient regimes, generated by the lightning strokes in the active conductors, towers and sky wires are analyzed using ATPEMTP simulations. The insulators` flashover is simulated considering their voltage-time characteristics and a specific
approach of the leader progression model (LPM). Simulations’ results and comparative analysis between these ones and those of the classical mathematical models, regarding protective currents and specific number of outages are presented.
Keywords: lightningflashoverATPprogressive leader
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