Abstract
In this work, the discrete Fourier transform, the least-square and least-absolute-value techniques are applied to the voltage harmonic estimation of a three-phase six-pulse converter. The algorithms are evaluated and compared with respect to the signal/noise ratio, number of samples, sampling frequency, computation time and missing data. The results of the estimation show an overall superiority of the least-absolute-value technique and an acceptable performance for the least-square method.