中国电气工程学报（英文） ›› 2020, Vol. 6 ›› Issue (1): 1-21.doi: 10.23919/CJEE.2020.000001

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  • 出版日期:2020-03-25 发布日期:2020-04-09

Overview on Submodule Topologies, Modeling, Modulation, Control Schemes, Fault Diagnosis, and Tolerant Control Strategies of Modular Multilevel Converters*

Fujin Deng*, Yongqing Lü, Chengkai Liu, Qian Heng, Qiang Yu, Jifeng Zhao   

  1. School of Electrical Engineering, Southeast University, Nanjing 210096, China
  • Online:2020-03-25 Published:2020-04-09
  • Contact: *Email: fdeng@seu.edu.cn
  • About author:Fujin Deng (SM’19) received the B.S. degree in electrical engineering from the China University of Mining and Technology, Jiangsu, China, in 2005, the M.S. degree in electrical engineering from Shanghai Jiao Tong University, Shanghai, China, in 2008, and the Ph.D. degree in energy technology from the Department of Energy Technology, Aalborg University, Aalborg, Denmark, in 2012.He joined the Southeast University in 2017 as a Professor in the School of Electrical Engineering, Southeast University, Nanjing, China. From 2013 to 2015 and from 2015 to 2017, he was a postdoctoral researcher and an assistant professor, respectively, in the Department of Energy Technology, Aalborg University, Aalborg, Denmark. His main research interests include wind power generation, multilevel converters, high-voltage direct-current technology, DC grid, and offshore wind farm-power systems dynamics.
    Yongqing Lü received the B.S. degree in electrical engineering from Jilin University, Changchun, China, in 2017. He is currently pursuing the M.S. degree in the School of Electrical Engineering, Southeast University, Nanjing, China. His main research interests include multilevel converters and high-voltage direct-current technology.
    Chengkai Liu received the B.S. degree from the Chien-Shiung Wu College of Southeast University, Nanjing, China, in 2018, majoring in electrical engineering. He is currently pursuing the Ph.D. degree in the School of Electrical Engineering, Southeast University, Nanjing, China. His main research interests include multilevel converters and DC grid.
    Qian Heng received the B.S. degree in electrical engineering and automation from the Nanjing University of Aeronautics and Astronautics, Jiangsu, China, in 2017. Currently, she is pursuing the M.S. degree in the School of Electrical Engineering, Southeast University, Nanjing, China. Her main research interests include multilevel converters and high-voltage direct-current technology.
    Qiang Yu received the B.S. degree in electrical engineering from Jilin University, Changchun, China, in 2017. He is currently pursuing the Ph.D. degree in the School of Electrical Engineering, Southeast University, Nanjing, China. His research interests include modular multilevel converter and high-voltage direct current technology.
    Jifeng Zhao received the B.S. and M.S. degrees in electrical engineering from the China University of Mining and Technology, Xuzhou, China, in 2015 and 2018, respectively. Currently, he is pursuing the Ph.D. degree in the School of Electrical Engineering, Southeast University, Nanjing, China. His main research interests include multilevel converters and high-voltage direct-current technology.

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Abstract: In the present scenario, modular multilevel converters (MMCs) are considered to be one of the most promising and effective topologies in the family of high-power converters because of their modular design and good scalability; MMCs are extensively used in high-voltage and high-power applications. Based on their unique advantages, MMCs have attracted increasing attention from academic circles over the past years. Several studies have focused on different aspects of MMCs, including submodule topologies, modeling schemes, modulation strategies, control schemes for voltage balancing and circulating currents, fault diagnoses, and fault-tolerant control strategies. To summarize the current research status of MMCs, all the aforementioned research issues with representative research approaches, results and characteristics are systematically overviewed. In the final section, the current research status of MMCs and their future trends are emphasized.

Key words: Capacitor voltage balancing control, circulating current control, fault diagnosis, fault tolerant control, modular multilevel converters, modulating strategy, modeling scheme, submodule topology