Navegando por Assunto "Lightning pulses"

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Modelagem através do método das diferenças finitas no domínio do tempo (FDTP) de solos dispersivos utilizando aproximações de Padé validada com experimentos em campo
(Universidade Federal do Pará, 2015-08-31) FUJIYOSHI, Daiyuki Maia; OLIVEIRA, Rodrigo Melo e Silva de; http://lattes.cnpq.br/4768904697900863
The Amazonian soil of Belém is modeled as a dispersive material, of which the electrical conductivity is dependent on the frequency. For this aim, we use the Padé's approxima-tion in frequency domain, which is applied to Ampère's law. Special update equations for electric field in time domain are obtained by applying time averaging and the in-verse Fourier transform. The results obtained by numerical simulations performed with the FDTD method are compared to transient responses measured in field. Lightning-patterned pulses are injected in classical grounding systems. Excellent agreement is ob-served, which validates the developed numerical method.