A DC-Link Modulation Scheme with Phase-Shifted Current Control for Harmonic Cancellations in Multidrive Applications

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Abstract

This letter proposes a harmonic mitigation strategy to cancel out current harmonics induced by the front-end rectifiers in multi-drive systems, which consist of diode rectifiers, Silicon-Controlled Rectifiers (SCR), and boost converters in the DC-link. The proposed strategy is a combination of a new DC link modulation scheme with a phase-shifted current control enabled by the SCR. The DC-link current modulation scheme is implemented by adding and subtracting specific modulation levels, which makes the total currents drawn from the grid “multi-level”, resulting in an improved current quality. Simulations and experiments have validated the effectiveness of the proposed harmonic mitigation solution for multi-drive systems.
Original languageEnglish
JournalIEEE Transactions on Power Electronics
Volume31
Issue number3
Pages (from-to)1837-1840
Number of pages4
ISSN0885-8993
DOIs
Publication statusPublished - Mar 2016

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Keywords

  • Harmonics
  • DC-link modulation
  • Phase-shift currents
  • Diode rectifiers
  • Silicon-Controlled Rectifier (SCR)
  • Three-phase multiple drive systems
  • Adjustable speed drives

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