A VI-based Measurement Instrument for Detection and Analysis of Power Quality Disturbances in Power Systems Using Wavelets

Abstract:- This paper presents a VI-based measurement instrument for detection and analysis of electrical power quality using wavelets. The virtual instrument developed can operate in two different working modes: detection and analysis of transient power quality disturbances and analysis of stationary or quasi-stationary disturbances. Depending on the working mode selected, different wavelet analysis, discrete or packet wavelet transform, with different mother wavelet, decomposition tree and sampling rate are performed in the input signal. The results obtained show a good performance of the method in the detection and analysis of different power quality disturbances in voltage supply