Development of criterion for choosing optimal type of mother wavelet in problem of calculating active and reactive power at power systems

Abstract

The paper presents a method for calculating the active and reactive power of higher harmonics using wavelet transform. The
calculation of components of power of harmonics will improve the accuracy of the technical and economic assessment of the
introduction of filter-compensating devices when solving the actual problem of harmonic suppression and loss reduction in current-carrying parts. A criterion has been developed for choosing the optimal type of wavelet in the problems of calculating and modeling the non-sinusoidal modes of power supply systems. The criterion is based on the determination of the local energy density of the harmonic group under study and on the possibility of carrying out the inverse wavelet transform (signal reconstruction) with the smallest error.