Virtual Flux Droop Control with Constant Switching Frequency for Power Sharing between Parallel Inverters in Islanded Microgrids

Saheb Khanabdal, Mahdi Banejad, Frede Blaabjerg, Nasser Hosseinzadeh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Droop control method is a popular method for power sharing in islanded microgrids with parallel-connected inverters. Virtual flux droop control is a simple strategy based on the direct flux control (DFC) and hysteresis controllers, in which the active and the reactive powers are proportional to the phase angle and the amplitude of the virtual flux (integral of the output voltage of the inverter), respectively. However, because of the hysteresis controllers, it suffers from a drawback that is the variable switching frequency, which leads to the voltage and current ripples. In this paper, novel phase angle and virtual flux controllers with simple structure have been proposed which lead to a fixed switching frequency, while there is no need for the space vector modulation. Therefore, the ripples of voltage and current have been reduced. In order to evaluate the effectiveness of the proposed method, simulation studies have been carried out in Matlab/Simulink. The results show that the proposed controllers can reduce the voltage and power ripples, while the switching frequency has been fixed.

Original languageEnglish
Title of host publicationICEE 2019 - 27th Iranian Conference on Electrical Engineering
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages868-874
Number of pages7
ISBN (Electronic)9781728115085
DOIs
Publication statusPublished - Apr 2019
Event27th Iranian Conference on Electrical Engineering, ICEE 2019 - Yazd, Iran, Islamic Republic of
Duration: Apr 30 2019May 2 2019

Publication series

NameICEE 2019 - 27th Iranian Conference on Electrical Engineering

Conference

Conference27th Iranian Conference on Electrical Engineering, ICEE 2019
Country/TerritoryIran, Islamic Republic of
CityYazd
Period4/30/195/2/19

Keywords

  • droop control
  • islanded microgrid
  • power sharing
  • virtual flux

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering
  • Instrumentation
  • Energy Engineering and Power Technology

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