Interface gráfica para avaliação de saturação em transformadores de corrente -TPX

Abstract

This work presents a saturation study of TPX current transformers applied in electrical power systems through the development of a graphical interface via Visual Studio in C A graphic interface was developed that allows the analysis of CT core saturation, through simulations for different conditions of three-phase and single-phase short- circuit levels, load variation according to the CT data, as well as the impedances connected to the secondary. In this way, the magnitude of the secondary voltage can be observed and compared with the levels described in standards, thus being able to conclude whether or not there was saturation of the current transformer core. In addition, the curves of ideal secondary current and real secondary current of the current transformer were integrated, as well as their respective RMS values, allowing a graphical analysis. The developed interface proved to be satisfactory, bringing to the user practicality in the analysis of saturation of current transformers and can be used by students and professionals in the area of protection of electrical systems.