Control strategy for flexible microgrid based on parallel line-interactive UPS systems

Josep M. Guerrero*, Juan C. Vásquez, Jóse Matas, Miguel Castilla, Lui García de Vicuna

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

733 Citations (Scopus)

Abstract

In this paper, the control strategy for a flexible microgrid is presented. The microgrid presented here consists of several line-interactive uninterruptible power supply (UPS) systems connected in parallel. The control technique is based on the droop method to avoid critical communications among UPS units. Thus, a flexible microgrid is obtained to operate in either grid-connected or islanded mode. A small-signal analysis is presented in order to analyze the system stability, which gives rules to design the main control parameters. Simulation and experimental results are presented, showing the feasibility of the proposed controller.
Original languageEnglish
JournalIEEE Transactions on Industrial Electronics
Volume56
Issue number3
Pages (from-to)726-736
Number of pages11
ISSN0278-0046
DOIs
Publication statusPublished - 1 Apr 2009
Externally publishedYes

Keywords

  • Distributed generation (DG)
  • Droop method
  • Microgrids
  • Uninterruptible power systems

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