An enhanced power decoupling control for grid-connected capacitive-coupling inverters

Wenyang Deng, Ning Yi Dai, Keng Weng Lao, Josep M. Guerrero

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

9 Citations (Scopus)

Abstract

Capacitive-coupling inverter (CCI) has low operation voltage and wide reactive power control range characteristics. Hence, it is a promising solution for parallel-connected inverters in microgrids (MGs). Decoupling control is popular in local controllers since it is able to adjust power transfer automatically as per demands varies. However, the conventional decoupling control cannot fully utilize CCI's power control capability, due to the decouple effect is limited by a small maximum phase angle. A virtual-impedance loop therefore is investigated to release the potential of CCI's power transfer. The proposed control is advantageous that the goal can be achieved by varying the equivalent impedance via programming, without making any changes in the real hardware. To ensure the desirable power delivery effect, transit response and stability are also studied. Simulation and experimental results are provided to show the validity of the proposed control method.
Original languageEnglish
Title of host publicationProceedings of 2019 IEEE Energy Conversion Congress and Exposition (ECCE)
Number of pages8
PublisherIEEE
Publication dateSept 2019
Pages1466-1473
Article number8913281
ISBN (Electronic)978-1-7281-0395-2
DOIs
Publication statusPublished - Sept 2019
Event2019 IEEE Energy Conversion Congress and Exposition (ECCE) - Baltimore, United States
Duration: 29 Sept 20193 Oct 2019

Conference

Conference2019 IEEE Energy Conversion Congress and Exposition (ECCE)
Country/TerritoryUnited States
City Baltimore
Period29/09/201903/10/2019
SeriesIEEE Energy Conversion Congress and Exposition
ISSN2329-3721

Keywords

  • Capacitive-coupling inverter
  • Microgrid
  • Power decoupling control
  • Virtual-impedance

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