2011-03-292011-03-292008-03-03GONZALEZ, Luciana Pereira. Análise eletromagnética de cabos OPGW utilizando métodos numérico e analítico. 2008. Orientador: Victor Alexandrovich Dmitriev. 71 f. Dissertação (Mestrado em Engenharia elétrica) - Instituto de Tecnologia, Universidade Federal do Pará, Belém, 2008. Disponível em: http://repositorio.ufpa.br/jspui/handle/2011/2055. Acesso em:.http://www.repositorio.ufpa.br:8080/jspui/handle/2011/2055This work presents an electromagnetic study of OPGW cables (OpticalGround Wire), which have the dual function of lightning protection for high voltage transmission lines and communications channel through the optical fibers embedded in the cable structure. Lightning or short-circuit could compromise the cable’s integrity due to heating in the regions where there is greater concentration of current. For the analysis of this problem lectromagnetic calculations were made relating them to thermal effects on the cable. In this analysis three different geometries were considered, a model of the real cable, a model of the cable with homogeneous layers, and a model of the cable with modified layer, where the modification is related the geometric shape of the armor wires of the cable. The tools used in this study here the commercial software FEMLAB Multiphysics, based on the finite element method, and an analytical model developed from Maxwell’s equations in the frequency domain, which was implemented using the software MATLAB. The main results of this work are current density distribution plots on the cross section considering different frequencies and the analysis of the skin and proximity effects.porAcesso AbertoCabo OPGW (Fio de aterramento ótico )Densidade de correnteEfeito pelicularEfeito de proximidadeOPGW cableCurrent densitySkin effectProximity effectDissertaçãoCNPQ::ENGENHARIAS::ENGENHARIA ELETRICA::TELECOMUNICACOES::TEORIA ELETROMAGNETICA, MICROONDAS, PROPAGACAO DE ONDAS, ANTENAS