Distributed Secondary Control for DC Microgrid with Virtual Voltage Compensation

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Abstract

DC microgrids are increasingly being applied in current power systems while droop control is often used for its control. Adding droop control to the voltage and current dual closed-loop control can achieve primary current sharing, but it will cause voltage deviation of the DC bus. To achieve current sharing while restoring bus voltage, secondary control is applied in control systems. This paper proposes a new secondary control scheme that utilizes the concept of 'virtual voltage drop', realizing accurate current sharing and voltage restore. Through the information exchange between neighboring distribute generators (DG) the local average value of virtual voltage drop is equal to the overall average value. In addition, the proposed secondary control scheme has no load limitations and can handle resistive and constant power loads. Ultimately, the simulation verification is conducted in MATLAB Simulink.

Original languageEnglish
Title of host publicationIECON 2023 - 49th Annual Conference of the IEEE Industrial Electronics Society
PublisherIEEE Computer Society
ISBN (Electronic)9798350331820
DOIs
StatePublished - 2023
Event49th Annual Conference of the IEEE Industrial Electronics Society, IECON 2023 - Singapore, Singapore
Duration: 16 Oct 202319 Oct 2023

Publication series

NameIECON Proceedings (Industrial Electronics Conference)
ISSN (Print)2162-4704
ISSN (Electronic)2577-1647

Conference

Conference49th Annual Conference of the IEEE Industrial Electronics Society, IECON 2023
Country/TerritorySingapore
CitySingapore
Period16/10/2319/10/23

Keywords

  • DC microgrids
  • distributed control
  • secondary control
  • voltage recovery

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