Comparison of the Estimation Errors of Parameters Associated With Individual Voltage Fluctuations Sources Using Selected Decomposition Methods

The paper presents preliminary research results on the estimation errors of parameters associated with individual voltage fluctuations sources using selected decomposition methods, i.e. Empirical Mode Decomposition (EMD), Empirical Wavelet Transform (EWT), Enhanced Empirical Wavelet Transform (EEWT). The estimated parameters are the rate of changes in the operating state of disturbing loads and the voltage changes values caused by a particular source of the disturbance. The decomposition of the voltage modulating signal, assuming that the voltage fluctuations can be identified with the amplitude modulation without the suppressed carrier wave, was used for estimation. The paper presents the results of experimental studies that allow comparing the accuracy of the estimation errors of parameters associated with individual voltage fluctuations sources using selected decomposition methods. Experimental studies were included typical sources of voltage fluctuations that cause fast voltage changes.