Computation-Cost-Invariant Universal Space-Vector Pulse-width Modulation for Multilevel Inverters

Fa Chen, Wei Qiao, Hongmei Wang, Liyan Qu

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

1 Scopus citations

Abstract

This paper proposes a new universal space-vector pulse-width modulation (SVPWM) scheme with invariant computation cost for multilevel inverters. In the proposed SVPWM, the modulation triangle in Sector 1 is quickly identified in a 120 coordinate system transformed from the alpha-beta coordinate system. Then, the switching states and duty cycles of the three vertices of the modulation triangle are determined by simple computations. The switching states in the other five sectors are obtained according to their simple relationships with those in Sector 1. The proposed SVPWM is independent of the voltage level of the inverter and does not require any prestored lookup table or iterative operation. Therefore, neither the execution time, nor the memory usage of the proposed SVPWM increases as the inverter level increases. Moreover, the proposed SVPWM is universal and can be applied to any multilevel inverters with the PWM controls based on space vector diagrams. The proposed SVPWM is validated by hardware tests on a three-level, neutral-point-clamped inverter; its computation cost invariance is validated by implementations in a digital signal processor for three-phase inverters with voltage levels up to 201; and its superiority is demonstrated by a comprehensive comparison with existing SVPWM schemes.

Original languageEnglish (US)
Title of host publication2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3460-3467
Number of pages8
ISBN (Electronic)9781728151359
DOIs
StatePublished - 2021
Event13th IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Virtual, Online, Canada
Duration: Oct 10 2021Oct 14 2021

Publication series

Name2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings

Conference

Conference13th IEEE Energy Conversion Congress and Exposition, ECCE 2021
Country/TerritoryCanada
CityVirtual, Online
Period10/10/2110/14/21

Keywords

  • Computation cost invariance
  • coordinate transformation
  • multilevel inverter
  • space vector pulse-width modulation (SVPWM)
  • universal PWM

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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