Decentralized control strategy for storage systems in islanded microgrids

Liwei Zhang; Lei Dai; Changming Zhao

Decentralized control strategy for storage systems in islanded microgrids

Liwei Zhang

Lei Dai

Changming Zhao

Vol. 21, No. 12, pp. 1834-1844, Dec. 2021

10.1007/s43236-021-00315-8

distributed storage system

Droop control

Power balance

Abstract

This paper presents a decentralized control strategy for the distributed storage (DS) systems of the islanded microgrid composed of distributed generations (DGs) and DSs. Each of the DSs consists of a bidirectional DC-DC converter cascaded with a three-phase inverter. Control strategies for DSs and DGs are based on droop control. The line frequency of the point of common coupling (PCC) is an agent to regulate the active power of the DS. Due to the power mismatch among the supplies and load demands of DGs, the frequency controller of the DS generates its active power reference. In addition, the frequency deviation caused by droop control can be reduced. Reactive load power is almost equally shared by all of the constituent units. Therefore, the DS works by charging or discharging the energy storage devices. Simulation and experimental results are provided to verify the effectiveness of the proposed control strategy.

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Cite this article

[IEEE Style]

L. Zhang, L. Dai, C. Zhao, "Decentralized control strategy for storage systems in islanded microgrids," Journal of Power Electronics, vol. 21, no. 12, pp. 1834-1844, 2021. DOI: 10.1007/s43236-021-00315-8.

[ACM Style]

Liwei Zhang, Lei Dai, and Changming Zhao. 2021. Decentralized control strategy for storage systems in islanded microgrids. Journal of Power Electronics, 21, 12, (2021), 1834-1844. DOI: 10.1007/s43236-021-00315-8.