An adaptive droop voltage control for DC microgrid systems

Zhongjing Ma, Wencai Jiang

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

16 Citations (Scopus)

Abstract

Distributed energy resources and energy-storage units are parallel connected through converters in a DC bus microgrid. Current sharing is a basic requirement for microgrid and many current sharing methods are proposed. Distinct from those methods like the average current method, centralized method and master-slave method, the droop control method does not need any interconnections between the converters and has been widely adapted. However, in the traditional droop control, the system deals with the tradeoff between voltage regulation and current sharing, and it results in the voltage drop in case of good current sharing. In this paper, in order to improve the system performance, we propose a novel droop control method, such that the system adaptively updates the output voltage set-point for each of converters. As demonstrated with simulations, the proposed method greatly improves the output voltage regulation without significant compromise of current sharing performance.

Original languageEnglish
Title of host publication26th Chinese Control and Decision Conference, CCDC 2014
PublisherIEEE Computer Society
Pages4512-4517
Number of pages6
ISBN (Print)9781479937066
DOIs
Publication statusPublished - 2014
Event26th Chinese Control and Decision Conference, CCDC 2014 - Changsha, China
Duration: 31 May 20142 Jun 2014

Publication series

Name26th Chinese Control and Decision Conference, CCDC 2014

Conference

Conference26th Chinese Control and Decision Conference, CCDC 2014
Country/TerritoryChina
CityChangsha
Period31/05/142/06/14

Keywords

  • Microgrid
  • converter parallel operation
  • current sharing
  • droop method
  • voltage control

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