Control of islanded DC microgrids using nonlinear adaptive decentralized controllers

M. A. Mahmud, T. K. Roy, S. Saha, M. E. Haque, H. R. Pota

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

8 Citations (Scopus)

Abstract

In this paper, an islanded DC microgrid is controlled using nonlinear adaptive decentralized controllers. The decentralized controllers are designed for the DC microgrid components which supply power (e.g., renewable energy sources and other standby generators) and store energy such as battery energy storage systems (BESSs). The power sources and BESSs in DC microgrids are decoupled using feedback linearization technique and adaptive controllers are then designed by considering the DC-link capacitor of these components as unknown. The adaptation law is used to estimate the value of the DC-link capacitor while ensuring the desired value of the common DC-bus voltage. The effectiveness of the proposed controller is evaluated on a DC microgrid with a fuel cell, solar photovoltaic (PV) unit, BESS, and DC loads. Simulation results are carried out under different operating conditions and compared with an existing proportional integral (PI) controller.

Original languageEnglish
Title of host publication2017 IEEE Industry Applications Society Annual Meeting, IAS 2017
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-6
Number of pages6
ISBN (Electronic)9781509048946, 9781509048939
ISBN (Print)9781509048953
DOIs
Publication statusPublished - 5 Oct 2017
Externally publishedYes
Event2017 IEEE Industry Applications Society Annual Meeting, IAS 2017 - Cincinnati, United States
Duration: 1 Oct 20175 Oct 2017

Publication series

Name2017 IEEE Industry Applications Society Annual Meeting, IAS 2017
Volume2017-January

Conference

Conference2017 IEEE Industry Applications Society Annual Meeting, IAS 2017
Country/TerritoryUnited States
CityCincinnati
Period1/10/175/10/17

Keywords

  • Adaptation law
  • Common DC-bus voltage
  • DC microgrids
  • DC-link capacitor
  • Decentralized controller

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