Research on Triple-Port MMC-Based PET Scheme Based on High Frequency Links Interconnection of Horizontal Sub-Modules

Sun, Xiaofeng; Teng, Jiaxun; Qi, Lei; Pan, Yao; Bu, Zemin; Zhang, Min

doi:10.1109/ipemc-ecceasia48364.2020.9367784

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…It uses multi-winding transformer to integrate multiple fullbridge structure, but there is current recovery after the failure recovery is slow and redundancy scheme is difficult to realize. e modular structure of multilevel converter has the advantage of flexibility [16][17][18][19][20][21][22][23]. In this study, a four-port converter is constructed.…”

Section: Introductionmentioning

confidence: 99%

Fully Isolated Quad-Port Electric Energy Routing Converter with Medium- and High-Voltage Grid Connection Capability

Sha

Duan

Sheng

et al. 2022

Journal of Engineering

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Aiming at the demand for medium- and high-voltage port access capability in energy router, this study proposes a quad-port DC/DC converter topology scheme based on modular multilevel converter (QP-M2DC). Compared with the traditional multiterminal energy routing converter, it has the advantages of high modularity, strong flexibility, and high power density. In addition, for the modular structure on the medium- and high-voltage sides, this study proposes a narrow phase-shift cyclic modulation strategy, which reduces the system need for voltage balance control and simplifies the overall system control. This study comprehensively introduces and analyses the QP-M2DC topology, working principle, high-frequency link equivalent, and power characteristics, then establishes an equivalent model of system control, and proposes a control scheme for a multiterminal energy routing converter. Finally, a simulation model of the system is established through PLECS, and the simulation results show that in such a narrow phase-shift modulation strategy, the proposed topology can have stable operation in a variety of patterns, reduce the capacitance, and achieve better voltage balance at the same time. The experimental results show the converter efficiency of up to 97.8%. It further shows the superiority of the proposed topology structure and the correctness and effectiveness of the proposed control schemes.

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