Uma nova proposta para detecção e classificação de faltas em linhas de transmissão

Abstract

This paper presents a new proposal for detection and classification of transients in electrical power systems. The detection of these events is based on the variation of the Euclidean distance between two consecutive points in the planes formed by the sampled values of the voltage and current signals, and their respective different functions. For the respective classification of events, it is proposed to use a decision logic that verifies the variations in the plans, comparing them with the standards inherent to each type of transient. When a pattern is checked, the event is sorted. This logic was created through the simulation of several cases of different transient events, which were performed from the implementation of a test system in the EMTP-ATP® software. Thus, the sets of standard variations in the planes were determined for each type of transient, according to simulations in Matlab®. Also, the logics of event detection and classification were implemented and tested for the processing of signals from a bank with 3381 simulated cases in Matlab® software. Finally, it should be noted that the results obtained through simulations point to a very satisfactory efficiency for the detection and classification of verified transient events.