The influence of the dead time duration and switching frequency on the input current distortion of voltage-source active rectifiers

This paper is focused on the influence combinations of the dead time duration and switching frequency on the drawn current from the grid by voltage-source active rectifiers. Newly the various definitions of the total harmonic distortion of the current are used. According to the EU standard the total harmonic distortion of the current is calculated up to the 50th harmonic; this definition of the total harmonic distortion shows anomalies for higher switching frequencies. The aim of this paper is to present occurrence of harmonics at frequencies above 2.5 kHz (out of EU standard) and to point out the case of voltage-source active rectifiers operation at a grid resonance frequency.