Wavelet-Based Fuzzy Logics for Recognition of Faults at Nha Be Power Substation of the Vietnam Power System *

This paper presents a new study of power system transient fault recognition using Wavelet Multi-Resolution Analysis (MRA) technique integrated with Fuzzy logic. The proposed method requires less number of features as compared to conventional approach for the identification. The feature extracted through the wavelet is input by a fuzzy logic for the classification of events. After training the neural network, the weight obtained is used to classify the Power Quality (PQ) and Faults problems. These techniques are applied to recognize different faults in the supply voltage of the Southern Vietnam power system at NHABE substation. The research results prove the techniques can be used to detect and classify a wide range of power different faults occurring in power systems with a high accurate ratio. The simulation results possess significant improvement over existing methods in signal detection and classification