Comparison of harmonic estimation methods for power quality assessment

Abstract

Power quality is regulated by international accepted standards from IEEE and IEC. One of the parameters that is defined in the standards is the harmonic distortion. The grouping method is the standard-advised method to evaluate harmonics but other approaches can be used. In this paper, three different methods are compared considering memory requirements, relative time consumption and the uncertainty of the harmonic estimation with spectral leakage, noise and different harmonic phases.