Systematic approach for the analysis of the electromagnetic environment inside a building during lightning strike

This paper defines a systematic approach considering the lightning current at the base of the channel as the input function, and the spatial distribution of the electromagnetic (EM) field inside the building, or the overvoltages induced at the open ends of loops as the output functions. A parametric analysis of the influence of the lightning protection system on the output functions is carried out in the frequency domain. The systematic approach allows one to take into account the probabilistic nature of the input function, which transforms the values of the outputs from a deterministic to a distribution of probability. This is extremely useful for all electromagnetic compatibility (EMC) engineers dealing with realistic systems' designs or maintenance problems.