The analysis of signal amplitude estimation methods when determining parameters of power quality

Abstract

The article presents the results of model studies of methods for controlling the quality of electrical energy (applied to a traction substation) in the process of its conversion, distribution and power supply to traction and non-traction consumers. To identify the most accurate method for finding the amplitude of the signal, algorithms based on the standard Fourier and wavelet transform — a transformation with a constant and adaptive width of the wavelet window — are compared. The prospects for using algorithms to control the quality of electrical energy in the presence of overvoltage, voltage dips and rapidly changing voltage levels are considered. Studies are performed by the method of mathematical modeling using an interactive environment for scientific and engineering calculations MATLAB. The experiments reflect the prospects of using wavelet analysis to estimate the amplitude of the signal.