Effects of using DC-side average current-mode control on a three-phase converter with an input filter and distorted supply

Daniel John Tooth, Stephen Jon Finney, Barry Wayne Williams

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The use of DC-side current sensing and proportional plus integral average current-mode control is analyzed and shown to have several beneficial effects when applied to a three-phase, step-down, AC-DC, unity-power-factor converter. Conventionally, a large DC-side inductor was used with the considered converter, in order to reduce the propagation of harmonic currents due to non-sinusoidal supply voltages that result in the input currents being non-sinusoidal. A single DC-side current sensor, when used with an EPROM sinusoidal look-up table PWM modulation method, is shown to have a number of benefits including; reduction of the harmonic currents when a finite-value DC-side inductor is used, hence giving near-sinusoidal input currents and damping of the DC-side LC filter. Two other benefits are mentioned. The current-control loop is designed and the often ignored effect of the input filter on system stability is discussed. Two SIMULINKTM simulation models are developed and compared with each other.

Original languageEnglish
Pages (from-to)459-467
Number of pages9
JournalIEE Proceedings - Electric Power Applications
Volume147
Issue number6
DOIs
Publication statusPublished - Nov 2000

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