Detecção da saturação de transformadores de corrente para proteção de SEP

Abstract

The present work was the process of detecting strings for the detection of distortion of the current of the current transformers (CT), which are generated by the saturation of the core of the same. Specific times for the applications of the Third Derivative and the Mathematical Morphology, as registered in the specialized literature. Also, it is proposed a change in the basis in Mathematical Morphology, in which the boundary value for the detection of the intervals is of adaptive form during the processing of the signal, in counterpart to the empirical value in an original version of the method. In this way, the performance of the technique was improved compared to the response of its original application and the presentation by the Third Derivative method. The tags were analyzed in terms of performance per case analyzed, with coincidences of CT saturation tracking. Thus, it was possible to verify if all five cases were treated, as methodologies detected all the saturation intervals. However, as the options have just come out of the performance, the data were considered as delays, the anticipations and even the non-detection of periods of saturation, mainly for the techniques of Mathematical Morphology, in its first application, and the Third Derivative. Thus, how is the technique of data detection improved, as in any way, although it does not present a perspective of the absence of processes, considering that it is not detrimental to the performance of the system protection logic.