Asymptotic Time Domain Evaluation of a Single-Phase Cascade H-Bridge PWM Inverter Current Quality for Non-Equal DC Sources

Nurzhan Zhuldassov, Alex Ruderman

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

Abstract

Analytical current Total Harmonic Distortion (THD) calculation approach for a 2-level inverter introduced in late 1980s was recently generalized for a single-phase multilevel inverter with an arbitrary number of uniformly distributed voltage levels. Closed-form piecewise analytical solutions were obtained assuming relatively large switching-to-fundamental frequency ratio (asymptotic assumption) and inductance dominated loads. This paper addresses theoretical calculation of current THD for a single-phase cascade H-bridge inverter with carrier based Phase-Shifted PWM (PS-PWM) and non-equal DC sources that is relevant for distributed generation. For more than 3 H-bridges, current THD depends on non-equal DC sources switching sequence on a PWM period (carrier order). Current THD best and worst switching sequences are figured out for an arbitrary H-bridges count.

Original languageEnglish
Title of host publication2018 9th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781538667057
DOIs
Publication statusPublished - Aug 27 2018
Event9th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2018 - Charlotte, United States
Duration: Jun 25 2018Jun 28 2018

Publication series

Name2018 9th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2018

Other

Other9th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2018
CountryUnited States
CityCharlotte
Period6/25/186/28/18

Keywords

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

ASJC Scopus subject areas

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

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