Discharge rate balancing control strategy based on dynamic consensus algorithm for energy storage units in AC microgrids

Yajuan Guan, Lexuan Meng, Chendan Li, Juan C. Vasquez, Josep M. Guerrero

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

3 Citations (Scopus)
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Abstract

A dynamic consensus algorithm-based coordinated secondary control with an autonomous current-sharing control strategy is proposed in this paper for balancing discharge rate of energy storage systems (ESSs) in an islanded AC microgrid. The dynamic consensus algorithm is applied for information sharing between distributed generation (DG) units in order to regulate the output power of DGs according to ESS capacities and state-of-charge (SoC). The proposed controller can not only effectively prevent operation failure caused by over current and unintentional outage of DGs by means of balanced discharge rate control, but also provide fast response and accurate current sharing performance due to an autonomous current-sharing controller at primary level. In addition, expandability, flexibility and high reliability can be obtained thanks to the distributed architecture. Based on the developed linearized state-space model in z-domain, both the system stability and parameter sensitivity were analyzed. A comparison between experimental results obtained from using the conventional power sharing control and those obtained from the proposed coordinated control using a setup with three 2.2 kW DG units are presented to verify the effectiveness of the proposed controller.
Original languageEnglish
Title of host publicationProceedings of the 2017 IEEE Applied Power Electronics Conference and Exposition (APEC)
Number of pages7
PublisherIEEE Press
Publication dateMar 2017
Pages2788-2794
Article number7931093
ISBN (Electronic)978-1-5090-5366-7
DOIs
Publication statusPublished - Mar 2017
Event2017 IEEE Applied Power Electronics Conference and Exposition (APEC) - Tampa Convention Center, Tampa, FL, United States
Duration: 26 Mar 201730 Mar 2017

Conference

Conference2017 IEEE Applied Power Electronics Conference and Exposition (APEC)
LocationTampa Convention Center
CountryUnited States
CityTampa, FL
Period26/03/201730/03/2017
SeriesIEEE Applied Power Electronics Conference and Exposition (APEC)
ISSN2470-6647

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Keywords

  • AC microgrids
  • Balanced discharge rate
  • Coordinated secondary control
  • Dynamic consensus algorithm
  • Energy storage units

Cite this

Guan, Y., Meng, L., Li, C., Vasquez, J. C., & Guerrero, J. M. (2017). Discharge rate balancing control strategy based on dynamic consensus algorithm for energy storage units in AC microgrids. In Proceedings of the 2017 IEEE Applied Power Electronics Conference and Exposition (APEC) (pp. 2788-2794). [7931093] IEEE Press. IEEE Applied Power Electronics Conference and Exposition (APEC) https://doi.org/10.1109/APEC.2017.7931093