2011-03-232011-03-232008-02-29OLIVEIRA, Rodrigo Melo e Silva de. Nova metodologia para análise e síntese de sistemas de aterramento complexos utilizando o método LN-FDTD, computação paralela automática e redes neurais artificiais. 2008. 190 f. Orientador: Carlos Leônidas da Silva Souza Sobrinho. Tese (Doutorado em Engenharia Elétrica) - Instituto de Tecnologia, Universidade Federal do Pará, Belém, 2008. Disponível em: http://www.repositorio.ufpa.br:8080/jspui/handle/2011/1990. Acesso em:.http://www.repositorio.ufpa.br:8080/jspui/handle/2011/1990The FDTD method in General Coordinates (LN-FDTD) was implemented for analyzing structures not coincident to the Cartesian coordinate system. The method solves the Maxwells equations in time domain, allowing the calculation of data concerning the transitory and steady-state responses of such structures. The method is applied to analyze of special grounding electrodes. A new formulation for the truncating technique UPML, for conductive media, referred here as LN-UPML, was developed and implemented in order to make the simulations viable. A new methodology for locating grounding grid faults using two Artificial Neural Networks is presented. The LN-FDTD software was tested and validated though simulations of various grounding systems. A graphical user interface, named LANE SAGS, was implemented to simplify the use and to automate the data processing.porAcesso AbertoDiferenças finitasTécnica LN-UPMLRedes neurais artificiaisTransitórios eletromagnéticosSubstações de energiaAterramento elétricoInterface gráfica para usuáriosFinite differencesSoftware LANE SAGSArtificial neural networksElectromagnetic transitoryElectrical groundingPower substationLANE SAGS graphical user interfaceTeseCNPQ::ENGENHARIAS::ENGENHARIA ELETRICA::TELECOMUNICACOES::TEORIA ELETROMAGNETICA, MICROONDAS, PROPAGACAO DE ONDAS, ANTENAS