Autonomous voltage unbalance compensation in an islanded droop-controlled microgrid

Mehdi Savaghebi*, Alireza Jalilian, Juan C. Vasquez, Josep M. Guerrero

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review


Recently, there has been an increasing interest in using distributed generators (DGs) not only to inject power into the grid but also to enhance the power quality. In this paper, a stationary-frame control method for voltage unbalance compensation in an islanded microgrid is proposed. This method is based on the proper control of DGs interface converters. The DGs are properly controlled to autonomously compensate for voltage unbalance while sharing the compensation effort and also active and reactive powers. The control system of the DGs mainly consists of active and reactive power droop controllers, a virtual impedance loop, voltage and current controllers, and an unbalance compensator. The design approach of the control system is discussed in detail, and simulation and experimental results are presented. The results demonstrate the effectiveness of the proposed method in the compensation of voltage unbalance.

Original languageEnglish
Article number6140564
JournalIEEE Transactions on Industrial Electronics
Issue number4
Pages (from-to)1390-1402
Publication statusPublished - 1. Jan 2013
Externally publishedYes


  • Distributed generators (DGs)
  • microgrid
  • voltage unbalance compensation


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