Transient induced voltage computation in a high building struck by lightning

The effects resulting from direct lightning strikes to buildings may affect the reliable operation of electric and electronic systems installed inside. The influence of such phenomena on equipment and systems depends on the immunity levels, and on the magnetic field intensity due to the lightning current. In this paper, a time-domain simulation of the lightning induced voltage on electric circuits (open metal loops) located inside a high building, a steel structure, is presented. In order to make an extensive analysis, the simulation is carried out considering different regions within the building. The results related to magnetic flux density and induced effects, helpful in determining the critical positions of equipment, are presented, and some of them are compared with those obtained from other methodologies proposed in the literature.