Harmonic Currents of Semiconductor Pulse Switching Converters

Petr Bilik, Jan Zidek, Vaclav Kus, Tereza Josefova

Department of Electromechanics and Power Electronics, University of West Bohemia, Pilsen, Czech Republic.
Faculty of Electrical Engineering and Computer Science, VSB – Technical University of Ostrava, Czech Republic.

DOI: 10.4236/epe.2013.54B214                

Abstract

Due to the operation of power semiconductor switching converters, the content of harmonic currents, which these switching converters take from the feed array, is still increasing. One of the possible ways of minimizing these currents is the use of pulse switching converters. On one hand, the original, characteristic harmonic ones are minimized, but, on the other hand, new frequencies caused by the modulation frequency appear in the current spectrum. The level of the currents of these frequencies is small and is scarcely dependent on the load of the converter. It may happen that the proportional value of the monitored harmonic one is high, although the absolute value is low. In the article presented, there is a description of the activity of the pulse voltage rectifier and an analysis of the current taken. The other part contains the results of the harmonic analysis of the stated current, including both the absolute and proportional values according to the load. In the conclusion, there are results of measurements of pulsed switching converters taken from the real measurement.

Keywords

Rectifiers; Harmonic Analysis; Harmonic Distortion; Power System Harmonics; Current Measurement

Conflicts of Interest

The authors declare no conflicts of interest.

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