Analytical line-voltage THD formulation and optimization for sine- and third harmonic injection PWM in three-phase cascaded H-bridge multilevel inverters with fixed and variable DC supply ratios

Eli Barbie, Alon Kuperman and Dmitry Baimel

Energy, 2025, vol. 318, issue C

Abstract: This paper presents novel analytical formulations for Line-voltage Total Harmonic Distortion (LTHD) in three-phase Cascaded H-bridge (CHB) Multilevel Inverters with variable DC supply ratios. While LTHD minimization has been well-studied for fundamental-frequency modulation techniques, this work extends such optimization to high-frequency Pulse Width Modulation (PWM) schemes, specifically the popular sine-PWM (SPWM) and Third Harmonic injection sine-PWM (THISPWM).

Keywords: Sine-PWM; Third harmonic injection; Multilevel inverters; Cascaded H-Bridge; Optimization; Line voltage; Total harmonic distortion; Unequal DC sources (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:318:y:2025:i:c:s0360544225003111

DOI: 10.1016/j.energy.2025.134669

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