Using S-Transform and Shannon energy for electrical disturbances detection

This paper presents a novel method for power quality analysis based on S-Transform. The objective is the detection of certain disturbances that pollute the electrical network such as interruptions, sags and swells. S-Transform provides frequency-dependent resolution while maintaining a direct relationship with the Fourier spectrum. The proposed approach consists in the application of Shannon Energy computed on each local spectrum obtained with the S-Transform. Using simulated and real data, the proposed method has been evaluated according to the accuracy of detecting the start and the end of each considered disturbance.