Monitoring of electricity quality indicators using Wavelet transform

The paper presents a simulation model of an electric power supply system with a nonlinear load operating in a non-stationary mode. To analyze the non-sinusoidal mode, the use of a batch wavelet transform is proposed. The wavelet transform has a number of advantages, which can be used to implement electricity quality indicators into a monitoring system. Subject of research: power quality indices. Purpose of research: proof of the advantage of the wavelet transform in the analysis of non-sinusoidal non-stationary modes. Object of research: a power supply system with a voltage of up to 1 kV with non-linear loads that distort the quality of electricity. Methods of research: analysis, computer modelling. Main results of research: еhe prospects of using the wavelet transform for the organization of a system for monitoring electricity quality indicators have been proved; the absence of the spectrum spreading effect is shown.