Surge Waves Propagation on Transmission Lines Induced by Lightning Stroke

The paper deals with surge phenomena on homogeneous and non-homogeneous transmission lines. The case of surge phenomena caused by the lightning stroke is considered. The lightning is modeled as the current wave injected by the source placed at any internal point of the line. The propagation of the surge wave induced by the lightning affecting the overhead line and transmitting to the cable is evaluated. Problem is solved numerically in the time domain. The efficiency and correctness of the proposed method is shown on some illustrative examples. According to the suggested algorithms is calculated the distribution of induced current and voltage along the whole transmission line namely near to the place of the connection both lines. The manner of the lines-connection can be modeled due to various two-ports