Aplicação de métodos analíticos para a determinação da capacitância de linhas de transmissão

Abstract

Capacitance is a parameter of great relevance in transmission lines. The objective of this final paper was to determine the capacitance of four different transmission lines configurations using diverse analytical methods and then its computational simulation with the FEMM® software. It analyzed the eccentric cylindrical cable, the single - phase transmission line of equal radius without the effect of earth and with the effect of earth, besides the single - phase line with conductors of different radii without the effect of earth. For this, it was applied the conformal mapping, the method of images and the equivalent charge method. It was found that the analytical and numerical capacitance values were very similar, with small percentage deviations; provided that the analytical premises were complied with.