Unified coordination control strategy for DC solid‑state transformer in DC microgrid

Yanbing Jia; Pei Zhao; Jinjie Tian; Xiangqi Meng; Han Wu

Unified coordination control strategy for DC solid‑state transformer in DC microgrid

Vol. 22, No. 8, pp. 1374-1385, Aug. 2022

10.1007/s43236-022-00432-y

DC microgrid

DC solid state transformer (DCSST)

Bus voltage

Coordinated control

Abstract

The existing control strategies of DC solid-state transformer (DCSST) are based on DC distribution system, which is mainly concentrated on one side voltage stability control without considering the change of control objectives under different conditions. Thus, they are unsuitable for multiterminal and multisource DC microgrid. The coordinated control strategy of DCSST in multiterminal and multisource DC microgrid is studied in this paper. The DCSST circuit models based on the series–parallel structure of dual active full bridge converter are established, and the basic control modes are analyzed: control low voltage mode and control high voltage mode. Combined with the characteristics of DC bus voltage fluctuation and the operation conditions of DCSST, a unified coordinated control strategy is proposed. Experimental results show that the proposed control strategy can correctly identify the different power states of the two sides of the system, control the power exchange between the two sides of the system, and maintain the stable operation of the whole DC system.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

Y. Jia, P. Zhao, J. Tian, X. Meng, H. Wu, "Unified coordination control strategy for DC solid‑state transformer in DC microgrid," Journal of Power Electronics, vol. 22, no. 8, pp. 1374-1385, 2022. DOI: 10.1007/s43236-022-00432-y.

[ACM Style]

Yanbing Jia, Pei Zhao, Jinjie Tian, Xiangqi Meng, and Han Wu. 2022. Unified coordination control strategy for DC solid‑state transformer in DC microgrid. Journal of Power Electronics, 22, 8, (2022), 1374-1385. DOI: 10.1007/s43236-022-00432-y.