Influência dos modelos de linhas no perfil de tensão de sistemas de distribuição de energia elétrica

Abstract

This is a study about the influence of line models on the voltage profile in electric power distribution systems. The methodology proposes to analyze the impact of two mathematical models of transmission line and the insertion of distributed generation in the primary distribution line. The study was carried out using the mathematical tools and models of the MATLAB computational environment, with emphasis on the Simulink graphical interface. To the evaluation and study of the electrical behavior of a distribution system, the IEEE 13 node test feeder was modeled and simulated. Changes in the voltage profile were examined when switching between the distributed parameter line model and concentrated parameters, as well as the effect caused by the insertion of generation based on a turbine that uses an induction machine as a wind generator doubly-fed strategically coupled to one of the system nodes and also analyze the viability of replacing the voltage impact caused by existing capacitor banks in the original radial system by this distributed generation. Based on the evaluations made in the work, it is concluded that, due to the topology of the distribution systems, the lines can be well represented by the lumped parameter model, with their self and mutual impedances calculated by the modified Carson equations.