Metodologia para o Cálculo de Parâmetros de Cabos Submarinos de Potência aplicando Análise por Elementos Finitos

Abstract

The expansion of offshore wind farms, the need for oil production in increasingly deeper waters and the demand for larger power transmission systems have required new levels of technology and performance of submarine power cables. The long length of these cables makes such applications more susceptible to a series of undesirable electromagnetic phenomena, including transient ones, requiring studies to be carried out for the design and commissioning of the system, as well as to assess and mitigate the consequences of such phenomena. For this type of evaluation, computer simulations are indispensable and, in the aforementioned case, they demand specific models, suitable for high frequency studies. In the case of insulated cables, the elaboration of their modeling requires, as input data, the matrices of resistances and inductances at various frequencies, from Hz to MHz. In this way, the Finite Element Method (FEM) is a powerful tool for obtaining such parameters. In this context, this paper presents a methodology composed of advanced techniques for the calculation of submarine power cables parameters through the FEM. Three different models of submarine application cables are employed in various case studies. The objective is to discuss the best way to model certain constructive characteristics of cables in the FEM, as well the impact of these characteristics on parameter values and in the associated joule losses.