Detection and Classification of Power Quality Disturbances using Wavelets

Abstract- This paper presents a novel method to detect and classify the power quality disturbances using wavelets. The proposed method uses different wavelets for a particular class of disturbance. This method uses wavelet filter banks in an effective way and does multiple filtering to detect the disturbance. The classifier has been tested on various disturbances viz. voltage sag, swell, momentary interruption, capacitor switching and single line to ground fault. A quantitative comparison of results shows the set of wavelets used for detection of the disturbances. This method is tested for a large class of test conditions simulated in MATLAB/SIMULINK