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YAN Yinyu,SUN Yichao,ZHANG Jinlong.Modular Multilevel Matrix Converter Based Power Electronic Transformer for Port Power Supply[J].JOURNAL OF POWER SUPPLY,2020,18(3):46-54
Modular Multilevel Matrix Converter Based Power Electronic Transformer for Port Power Supply
Received:December 29, 2019  Revised:May 07, 2020
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DOI:10.13234/j.issn.2095-2805.2020.3.46
Keywords:power electronic transformer(PET)  modular multilevel matrix converter(M3C)  dual active bridge(DAB)  three-phase four-leg inverter
Fund Project:National Science Natural Foundation of China
        
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YAN Yinyu School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing , China
SUN Yichao School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing , China
ZHANG Jinlong School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing , China
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Abstract:
      A novel topology of modular multilevel matrix converter(M3C) based power electronic transformer is prop-osed for port power supply, which employs an M3C, a dual active bridge(DAB) and a three-phase four-leg inverter as its input, intermediate and output stage, respectively. There are four ports in this transformer, in which two high-voltage AC ports are connected with an offshore wind farm and an onshore power grid, respectively, thereby realizing the port power supply by the offshore wind farm and onshore power grid simultaneously. In addition, a low-voltage AC port and a low-voltage DC port are used to supply power to ships and port electrical equipment, respectively. Based on the analysis of the novel transformer topology, the mathematical models for different stages of the transformer are derived, and the corresponding control methods are given accordingly. Finally, the correctness and feasibility of the proposed topology and control methods are verified by Matlab/Simulink simulations.
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