Analysis of the Influence of Error Amplifier Factors on Total Harmonic Distortion of Converter Input Current

Abstract

The paper discusses a control system of a three-phase step-up converter which in addition to control functions performs phase current correction. Study of the control system operation is carried out and expressions for calculating the maximum permissible values of error amplifier factors are obtained. Influence of the error amplifier parameters on phase current quality is investigated. At a given value of power factor the dependence of total harmonic distortion as per IEC 61000-3-12:2004 on a combination of error amplifier parameters is obtained. The conditions under which the total harmonic distortion has a minimum value are found out. This article is of interest to power electronics engineers, who aim to develop three-phase AC-to-DC converters with input phase currents of high quality.