A Novel Approach to Generate Effective Carrier-Based Pulsewidth Modulation Strategies for Diode-Clamped Multilevel DC-AC Converters

Ramkrishan Maheshwari, Sergio Busquets-Monge, Joan Nicolas-Apruzzese

Research output: Contribution to journalJournal article

Abstract

Several pulsewidth modulation (PWM) strategies have been proposed for three-phase multilevel converters. Typically, these PWM methods can be either space-vector or carrier-based implemented, where the carrier-based implementation usually presents a lower computation complexity. In this paper, a novel approach for the carrier-based implementation of different existing PWM methods is proposed for three-(3L) and four-level (4L) dc-ac converters, which can be easily extended to any number of levels. The main features of the proposed approach are its reduced computation complexity and computation time. On the other hand, the proposed approach suggests the derivation of novel PWM strategies which can potentially present improved performance features. As an example, two new discontinuous PWM (DPWM) strategies are proposed for the 4L converter. One of these DPWM strategies presents lower weighted total harmonic distortion than other previously proposed strategies. Simulation and experimental results verify the effectiveness of the proposed approach and novel DPWM strategies.

Original languageEnglish
Article number7425201
JournalIEEE Transactions on Industrial Electronics
Volume63
Issue number11
Pages (from-to)7243-7252
Number of pages10
ISSN0278-0046
DOIs
Publication statusPublished - Nov 2016

Keywords

  • Multilevel inverter
  • neutral-point-clamped (NPC) inverter
  • pulsewidth modulation (PWM)

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