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DCSST Multi-Modular Equalization Scheme Based on Distributed Control

School of Electrical Engineering, Guizhou University, Guiyang 550025, China
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Academic Editor: Fabio Viola
Sensors 2021, 21(23), 8125; https://doi.org/10.3390/s21238125
Received: 15 November 2021 / Revised: 1 December 2021 / Accepted: 1 December 2021 / Published: 4 December 2021
(This article belongs to the Section Physical Sensors)
As an important part of the DC micro-grid, DC solid-state transformers (DCSST) usually use a dual-loop control that combines the input equalization and output voltage loop. This strategy fails to ensure output equalization when the parameters of each dual active bridge (DAB) converter module are inconsistent, thus reducing the operational efficiency of the DCSST. To solve the above problems, a DCSST-balancing control strategy based on loop current suppression is presented. By fixing the phase-shifting angle within the bridge and adjusting the phase-shifting angle between bridges, the circulation current of each DAB converter module is reduced. Based on the double-loop control of the DAB, five controllers are nested outside each DAB submodule to achieve distributed control of the DCSST. The proposed control strategy can reduce the system circulation current with different circuit parameters of the submodules, ensure the balance of input voltage and output current of each submodule, and increase the robustness of the system. The simulation results verify the validity of the proposed method. View Full-Text
Keywords: DCSST; DAB; balance control; distributed control DCSST; DAB; balance control; distributed control
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MDPI and ACS Style

Teng, F.; Kong, D.; Cui, Z.; Qin, Y.; Hao, Z.; Rong, N.; Chen, Z. DCSST Multi-Modular Equalization Scheme Based on Distributed Control. Sensors 2021, 21, 8125. https://doi.org/10.3390/s21238125

AMA Style

Teng F, Kong D, Cui Z, Qin Y, Hao Z, Rong N, Chen Z. DCSST Multi-Modular Equalization Scheme Based on Distributed Control. Sensors. 2021; 21(23):8125. https://doi.org/10.3390/s21238125

Chicago/Turabian Style

Teng, Fei, Dezheng Kong, Zixuan Cui, Yuan Qin, Zhenghang Hao, Na Rong, and Zhuo Chen. 2021. "DCSST Multi-Modular Equalization Scheme Based on Distributed Control" Sensors 21, no. 23: 8125. https://doi.org/10.3390/s21238125

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