Distributed Finite-time Power Management for Hybrid Energy Storage Systems in DC microgrids

Qianwen Xu, Lihua Xie, Tomislav Dragicevic

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Hybrid energy storage systems (HESSs) with batteries and supercapacitors (SCs) provide an effective solution to compensate fluctuations of renewable resources and fast loads in DC microgrid. This paper proposes a distributed power management strategy for HESSs. In primary level, a virtual resistance/capacitance droop control strategy is implemented to achieve decentralized low- and high-frequency power sharing of batteries and supercapacitors (SCs). Then a distributed finite-time secondary control strategy is proposed to address the issues of DC bus deviation, state-of-charge (SoC) balancing of batteries and SoC recovery of SCs. With the proposed finite-time controller, DC bus voltage is restored to the nominal value and SoC balancing of batteries is achieved in finite time with information from neighbouring batteries; SoCs of SCs are restored to their initial values autonomously. The proposed power management strategy only requires limited communication among batteries and does not require communication among SCs. Simulations are conducted to verify the effectiveness of the proposed method.
Original languageEnglish
Title of host publicationProceedings of 2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems
PublisherIEEE
Publication date2020
Pages170-174
ISBN (Print)9781728169897
DOIs
Publication statusPublished - 2020
EventIEEE 11th International Symposium on Power Electronics for Distributed Generation Systems - Virtual event, Dubrovnik, Croatia
Duration: 28 Sep 20201 Oct 2020

Conference

ConferenceIEEE 11th International Symposium on Power Electronics for Distributed Generation Systems
LocationVirtual event
CountryCroatia
CityDubrovnik
Period28/09/202001/10/2020
Series2020 Ieee 11th International Symposium on Power Electronics for Distributed Generation Systems (pedg)
ISSN2329-5767

Keywords

  • Hybrid energy storage systems
  • Finite-time
  • Distributed control
  • Supercapacitor
  • Battery

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