Utilization of reduced models for the analysis of lightning induced overvoltages on overhead lines

Effects of nearby buildings on lightning induced voltages on overhead power distribution lines

“…Interestingly, the second effect is also present -although to a reduced extent -if the building is situated at the opposite side of the line with respect to the lightning channel. Also, the results obtained by using the proposed procedure that involves both a 3D FEM model for the calculation of the LEMP and the solution of the field-to-line coupling equations appear to be consistent with the measurements presented in [9,10] obtained using reduced scale model.…”

“…The reduction of lightning-induced voltages on power distribution lines due to the shielding effects of nearby buildings is analyzed in [9] by means of a reduced scale model. The network model, placed above an aluminum plane simulating a perfectly conductive ground, is coupled with the electromagnetic pulse produced by a simulated lightning channel composed by a copper conductor wounded on an insulating rod.…”

The influence of buildings on the propagation of electromagnetic waves generated by lightning

“…Experimental observations performed on a reduced scale model (1:50) constructed at the University of São PauloBrazil [4], have shown that buildings influence significantly the effect of the lightning strokes on the distribution lines situated in their vicinity, since they affect the propagation of the lightning electromagnetic fields, consequently affecting the induced voltages. The study has considered a disposition of buildings of different heights, simulated by aluminum boxes and the ground was represented by aluminum plates.…”

“…[1] The effects of electromagnetic fields generated by lightning on electric networks have been already extensively studied, leading to the computational simulation of voltages induced on distribution lines, with or without protection [1,2,3]. Experiments performed in reduced scale models [4,5] allowed the analysis of more complex configurations of the lines, and were also used to validate theoretical methods for calculation of overvoltages.…”

Influência das edificações na propagação de ondas eletromagnéticas geradas por descargas atmosféricas.

“…Vieira e Janiszewski, 2014), afetando as tensões induzidas avaliadas em (Rubinstein, 1996;Rachidi et al, 1996;Romero, Piantini, Cooray. 2014 (Eriksson, Stringfellow, Meal, 1982;Nucci, 2009;Parrish e Hill, 1991) 1991 (Piantini, 2008;Nucci et al, 1993;Nucci, 2009;Eriksson, Stringfellow, Meal, 1982;Piantini et al, 2010).…”