Models for calculation of lightning induced overvoltages usually assume a straight and vertical lightning channel. However, it is well known that the lightning path is tortuous on scales ranging from 1 m to 1 km. In this paper the tortuosity effect is analyzed for both lightning-generated electromagnetic fields and induced voltages. For a schematic representation of tortuous lightning channel, it is shown that at close and intermediate ranges the predominant effect is due to the inclination of the lowest channel segment; only for fields at relatively far ranges the overall tortuosity effect becomes appreciable. © 2011 IEEE.
Lightning electromagnetic fields and induced voltages: Influence of channel tortuosity / Andreotti, A., DE MARTINIS, U., Petrarca, C., V. A., R., Verolino, L.. - STAMPA. - (2011), pp. 1-4. (30th URSI General Assembly and Scientific Symposium Instanbul, Turkey 13-20 Agosto) [10.1109/URSIGASS.2011.6050702].
Lightning electromagnetic fields and induced voltages: Influence of channel tortuosity
ANDREOTTI, AMEDEO;DE MARTINIS, UMBERTO;PETRARCA, CARLO;VEROLINO, LUIGI
2011
Abstract
Models for calculation of lightning induced overvoltages usually assume a straight and vertical lightning channel. However, it is well known that the lightning path is tortuous on scales ranging from 1 m to 1 km. In this paper the tortuosity effect is analyzed for both lightning-generated electromagnetic fields and induced voltages. For a schematic representation of tortuous lightning channel, it is shown that at close and intermediate ranges the predominant effect is due to the inclination of the lowest channel segment; only for fields at relatively far ranges the overall tortuosity effect becomes appreciable. © 2011 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
