Asymptotic time domain evaluation of a single-phase multilevel PWM inverter current quality

Boris Reznikov, Milan Srndovic, Gabriele Grandi, Bexultan Rakhim, Yakov L. Familiant, Alex Ruderman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

This paper addresses theoretical calculation of a single-phase multilevel PWM inverter current Total Harmonic Distortion (THD). Analytical approach introduced in late 1980s for a 2-level inverter is generalized for an arbitrary level count for a single-phase inverter. Though the obtained closed-form piece-wise analytical solutions assume (infinitely) large ratio of switching and fundamental frequencies and pure inductive load, they are practically very accurate for the ratios of (apparent) switching and fundamental frequencies larger than 25-30 and inductance dominated loads. Along with strict mathematical solutions suggested are simple accurate Bessel function approximation and hyperbolic average trend one. The formulas clearly reveal a single-phase PWM inverter current THD dependence on modulation index for an arbitrary voltage level count and are easily modified to cover grid-connected cases.

Original languageEnglish
Title of host publication2015 International Conference on Electrical Drives and Power Electronics, EDPE 2015 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages42-47
Number of pages6
ISBN (Print)9781467373760
DOIs
Publication statusPublished - Nov 10 2015
Event18th International Conference on Electrical Drives and Power Electronics, EDPE 2015 - Tatranska Lomnica, Slovakia
Duration: Sep 21 2015Sep 23 2015

Other

Other18th International Conference on Electrical Drives and Power Electronics, EDPE 2015
CountrySlovakia
CityTatranska Lomnica
Period9/21/159/23/15

Keywords

  • DC-AC converter
  • harmonic
  • multilevel converter
  • single phase systems

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering

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