中国电气工程学报(英文) ›› 2021, Vol. 7 ›› Issue (1): 79-93.doi: 10.23919/CJEE.2021.000008

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  • 收稿日期:2020-04-30 修回日期:2020-05-05 接受日期:2020-06-26 发布日期:2021-04-19

Review of Low Carrier Ratio Converter System*

Mai Xu, Yang Zhang*, Da Luo, Anping Shen   

  1. College of Electrical Engineering, Hunan University of Technology, Zhuzhou 412007, China
  • Received:2020-04-30 Revised:2020-05-05 Accepted:2020-06-26 Published:2021-04-19
  • Contact: * E-mail: hut_zy@163.com
  • About author:Mai Xu was born in Yiyang, China, in December 1996. He received his B.S. degree in electrical engineering from Hunan University of Technology, Hunan, China, in 2019, where he is currently pursuing his M.S. degree in electrical engineering.His main research interests include high frequency rectification and application.Yang Zhang received his B.S. degree in applied physics and his M.S. degree in electrical engineering from Hunan University of Technology, Zhuzhou, China. He received his Ph.D. degree in electrical engineering from Hunan University, Hunan, China, in 2017.He is currently an assistant professor in Hunan University of Technology. His current research interests include wind power generation system and impedance-source converters.Da Luo was born in Shaoyang, China, in June 1995. He received his B.S. degree in Nanchang University College of Science and Technology, in 2018. He is currently pursuing his M.S. degree at Hunan University of Technology.His main research interests include power network automation technology and application.Anping Shen was born in Yiyang, China, in December 1998. She received her B.S. degree in electrical engineering from Hunan University of Technology, in 2020. She is currently pursuing her M.S. degree at Hunan University of Technology. Her main research interests include wind power converter technology and application.
  • Supported by:
    * National Natural Science Foundation of China (51907061) and Natural Science Foundation of Hunan Province of China (2019JJ50119).

关键词: Converter, low carrier ratio, modulation strategy, control method

Abstract: With the rapid development of new energy power generation and high-power traction technology, the voltage and power levels of converter devices have been continuously improved, and the application of high-power converters is becoming increasingly widespread. However, high-power converters are affected by switching losses and heat dissipation, meaning they are not suitable for high carrier conditions. Therefore, research of low carrier ratio converter systems has received increased attention. Based on existing research, the problems of large current harmonics, low observation accuracy, and poor stability that may occur at low carrier ratios are explained. In addition, the topologies, modulation strategies, and control methods of the low carrier ratio converter system are analyzed and classified. Finally, future research directions of low carrier ratio converter systems are proposed.

Key words: Converter, low carrier ratio, modulation strategy, control method