Dual buck based power decoupling circuit for single phase inverter/rectifier

Xiao Li, Shunlong Xiao, Haiyu Zhang, Robert Balog, Baoming Ge

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

4 Citations (Scopus)

Abstract

Single phase rectifiers and inverters are inherently subject to double-line frequency ripple power, at both the ac and dc sides, which has adverse effects on the overall system performance. Normally a bulky capacitor is placed at the dc side of the circuit to prevent this ripple power ripple from reaching the dc source. This approach results in low power density and reliability issues. As a result, active power decoupling methods have been proposed such that the total capacitance required can be orders of magnitude smaller. This paper proposed a new power decoupling circuit, which is composed of two separate buck converters operating in each half cycle and two split dc-link capacitors. The dc link capacitors can be used to store ripple power while supporting transient power to the main output. The capacitance needed is reduced largely by allowing high voltage fluctuation on capacitors, while the dc link voltage can be controlled with small fluctuation. The dc link capacitors can be fully charged and discharged with full energy utilization. The added power decoupling module does not need dead time, and totally eliminates the shoot through concerns, which could enhance the system reliability. Another advantage of the proposed power decoupling method is that its control is independent with that of the main power stage. Modulation and control strategy are proposed for the power decoupling circuit. The operating principles together with parameters design are discussed in detail. Both simulation and experimental results prove the effectiveness of this method.

Original languageEnglish
Title of host publicationECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509007370
DOIs
Publication statusPublished - 13 Feb 2017
Externally publishedYes
Event2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016 - Milwaukee, United States
Duration: 18 Sep 201622 Sep 2016

Other

Other2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016
CountryUnited States
CityMilwaukee
Period18/9/1622/9/16

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Keywords

  • Active power decoupling
  • buck converter
  • dc-link capacitor
  • single phase system
  • split capacitor

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Control and Optimization

Cite this

Li, X., Xiao, S., Zhang, H., Balog, R., & Ge, B. (2017). Dual buck based power decoupling circuit for single phase inverter/rectifier. In ECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings [7855052] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2016.7855052