Simultaneous Selective Harmonic Elimination and THD Minimization for a Single-Phase Multilevel Inverter with Staircase Modulation

Milan Srndovic, Aidar Zhetessov, Tohid Alizadeh, Yakov L. Familiant, Gabriele Grandi, Alex Ruderman

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Power electronic converters for medium- and high-power/voltage applications employ low-frequency fundamental switching frequencies and, therefore, minimize switching losses. There are two main control techniques of switching angle estimation; total harmonic distortion (THD) minimization and selective harmonic elimination (SHE). In case of the first control technique, the switching angles are found based on THD minimization without being specifically focused on eliminating some exact harmonics. For the SHE control technique, all degrees of freedom, due to available number of switching angles, is used for the elimination of certain low-order harmonics. The basic idea of combining those two control techniques consists of using some degrees of freedom for eliminating certain harmonics and using the others for minimizing the remaining THD content. This generalized problem formulation includes classic minimal THD and SHE problems as special cases. Theoretical developments are verified by the set of experimental cases for the voltage and current THDs selecting characteristic working points over the modulation index range.

Original languageEnglish
Pages (from-to)1532-1541
Number of pages10
JournalIEEE Transactions on Industry Applications
Volume54
Issue number2
DOIs
Publication statusPublished - Mar 1 2018

Keywords

  • Minimal total harmonic distortion (THD)
  • multilevel inverters
  • selective harmonic elimination (SHE)
  • staircase modulation

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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