Closed-Form Analytic Expression of Total Harmonic Distortion in Single-Phase Multilevel Inverters with Staircase Modulation

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14 Scopus citations

Abstract

In this letter, explicit analytic expression of output voltage total harmonic distortion (THD) in staircase modulated single-phase multilevel inverters (MLI) is derived and verified. The revealed nonrecursive formulae is expressed as a simple function of all possible switching angles, valid for generalized MLI irrespectively of the topology and number of voltage levels (odd or even). The proposed expression may be utilized for accurate calculation of THD values, eliminating the risk of underestimation associated with typical frequency-based (numerical) approaches adopted by modern computational software packages.

Original languageEnglish
Article number8741195
Pages (from-to)5213-5216
Number of pages4
JournalIEEE Transactions on Industrial Electronics
Volume67
Issue number6
DOIs
StatePublished - 1 Jun 2020

Keywords

  • Multilevel inverters
  • THD minimization
  • staircase modulation (SCM)
  • total harmonic distortion (THD)

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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