On the Transmission-Line Approach for the Evaluation of LEMP Coupling to Multiconductor Lines


This paper provides some clarification on the subject of the response of multiconductor lines to lightning-originated electromagnetic fields. Specifically, the result of the presence of more conductors on the road response is analyzed with and without taking under consideration the ground losses in the surge propagation. The impact of the boundary conditions is also discussed. The presented analysis shows, in particular, that the response of a matched multiconductor lossless line differs from that of a single-conductor line at the identical height only in the line currents. The result of the nearby line conductors on the induced voltages is, indeed, noticeable when the ground losses are taken under consideration within the surge propagation.

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