Small-Signal Modeling, Analysis and Testing of Parallel Three-Phase-Inverters with A Novel Autonomous Current Sharing Controller

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Abstract

A novel simple and effective autonomous currentsharing controller for parallel three-phase inverters is employed in this paper. The novel controller is able to endow to the system high speed response and precision in contrast to the conventional droop control as it does not require calculating any active or reactive power, instead it uses a virtual impedance loop and a SFR phase-locked loop. The small-signal model of the system was developed for the autonomous operation of inverter-based microgrid with the proposed controller. The developed model shows large stability margin and fast transient response of the system. This model can help identifying the origin of each of the modes and possible feedback signals for design of controllers to improve the system stability. Experimental results from two parallel 2.2 kVA inverters verify the effectiveness of the novel control approach.
Original languageEnglish
Title of host publicationProceedings of the 30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015
Number of pages8
PublisherIEEE Press
Publication dateMar 2015
Pages571 - 578
ISBN (Print)978-1-4799-6735-3
DOIs
Publication statusPublished - Mar 2015
Event30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015 - Charlotte, United States
Duration: 15 Mar 201519 Mar 2015

Conference

Conference30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015
CountryUnited States
CityCharlotte
Period15/03/201519/03/2015
SeriesI E E E Applied Power Electronics Conference and Exposition. Conference Proceedings
ISSN1048-2334

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Keywords

  • Three-phase parallel inverters
  • Autonomous current control
  • Modeling

Cite this

Guan, Y., Quintero, J. C. V., Guerrero, J. M., & Coelho, E. A. A. (2015). Small-Signal Modeling, Analysis and Testing of Parallel Three-Phase-Inverters with A Novel Autonomous Current Sharing Controller. In Proceedings of the 30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015 (pp. 571 - 578 ). IEEE Press. I E E E Applied Power Electronics Conference and Exposition. Conference Proceedings https://doi.org/10.1109/APEC.2015.7104406