Characteristics of vicinal pulse electromagnetic field for lightning stroke to tall building

The lightning current will radiate electromagnetic pulse field (LEMP) when striking tall building. And it could induce high current in cables or equipments near the building. But for huge amount of calculation and storage space, the issued researches on lightning electromagnetic fields in striking tall building are confined to the discrete points near the ground. In this paper, the LEMP on every grid of the whole space were calculated with Processing window FDTD method (PWFDTD), which avoids the huge amount of storage when computing the distribution of lightning electromagnetic field in large range. The spatial attribute of LEMP characteristic parameters were obtained. These distribution plots is important for the protection and evaluation of LEMP near the tall building, especially for the building in urban area.