Proportional reactive power sharing for islanded microgrids

M. I. Azim, Md Alamgir Hossain, S. M. Mohiuddin, M. J. Hossain, H. R. Pota

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

3 Citations (Scopus)


In this paper, droop-based automatic control schemes are presented to control parallel inverter-interfaced distributed generators (DG) in a way that proportional reactive power sharing is possible in islanded microgrids under different structures. This paper modifies the conventional reactive power-voltage (Q-V) droop control strategy used in inductive (L-type) islanded microgrids by implementing voltage control law in overall control operation such that reactive power becomes inversely proportional to the reactive droop gain if the initial values of inverter-interfaced voltage-sources are the same. Reactive power sharing approach for resistive (R-type) islanded microgrids is also included in this paper; in which it is shared depending on rate-of-angle of voltage-sources, i.e., reactive power-frequency (Q-f) droop. The proposed control methods utilize linear modal analysis to design both types of droop-based controllers. A 5-bus microgrid with 4-parallel inverter-connected DG units is considered for simulations under load changing phenomenon where results show the excellency of the designed control schemes.

Original languageEnglish
Title of host publicationICIEA 2016
Subtitle of host publicationProceedings of the 2016 IEEE 11th Conference on Industrial Electronics and Applications
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages6
ISBN (Electronic)9781509026050
Publication statusPublished - 19 Oct 2016
Externally publishedYes
Event11th IEEE Conference on Industrial Electronics and Applications, ICIEA 2016 - Hefei, China
Duration: 5 Jun 20167 Jun 2016


Other11th IEEE Conference on Industrial Electronics and Applications, ICIEA 2016


  • DG units
  • inductive (L-type) droop control
  • reactive power sharing
  • resistive (R-type) droop control
  • voltage-source converters (VSC)

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