Avaliação da qualidade de modelos de linha de transmissão para estudos de transitórios eletromagnéticos.

Abstract

An evaluation of transmission line models is presented, appropriate for electromagnetic transients studies for a pilot system diagnostic performance of the Chest protection system. The data for preparation of the models were obtained from treatment of the real physical and electrical characteristics of the known transmission lines. Based on the processed data, models of transmission lines that make up the pilot system were obtained, adopting distributed constant parameters, frequency dependent parameters and the nominal PI. In order to evaluate the quality of the obtained models, using ATP (Alternative Transients Program), were simulated faults with incidence angle and location characteristics similar to the known real faults, comparing the results using the coefficient of determination R². It was obtained a similarity of at least 94% of the simulated signals and the real fault records, and the frequency dependent model parameters presented better result.