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ZTE Communications ›› 2023, Vol. 21 ›› Issue (4): 78-84.DOI: 10.12142/ZTECOM.202304010

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A Hybrid Five-Level Single-Phase Rectifier with Low Common-Mode Voltage

TIAN Ruihan1, WU Xuezhi1, XU Wenzheng1(), ZUO Zhiling2, CHEN Changqing2   

  1. 1.Beijing Jiaotong University, Beijing 100044, China
    2.ZTE Corporation, Shenzhen 518057, China
  • Received:2023-03-19 Online:2023-12-25 Published:2023-12-07
  • About author:TIAN Ruihan received her BS degree in electrical engineering and automation from Beijing Jiaotong University, China in 2021, where she is currently pursuing her MS degree in electrical engineering. Her current research interests include multilevel converters and DC/DC converters.
    WU Xuezhi received his BS and MS degrees in electrical engineering from Beijing Jiaotong University, China in 1996 and 1999, respectively, and his PhD degree in electrical engineering from Tsinghua University, China in 2003. He is currently a professor with the School of Electrical Engineering, Beijing Jiaotong University. His current research interests include microgrids, wind power generation systems, power converters for renewable generation systems, power quality, and motor control.
    XU Wenzheng (xuwenzheng@bjtu.edu.cn) received his BS degree in electrical engineering from Beijing Jiaotong University, China in 2012, MSc degree (with Distinction) in energy engineering from The University of Hong Kong, China in 2013, and PhD degree in electrical engineering from The Hong Kong Polytechnic University, China in 2020. He is currently a lecturer with the School of Electrical Engineering, Beijing Jiaotong University. His research interests include power electronics, wireless power transfer, transportation electrification, and energy storage converters.
    ZUO Zhiling received his BS degree in automation from Hebei University of Science and Technology, China in 2002. He is the director of R&D Department of Power Platform in ZTE Corporation. He is now mainly engaged in communication power technology research and product development, mainly focusing on the architecture and development trend of communication power supply.
    CHEN Changqing received his BS degree in electronic science and technology from Southwest Jiaotong University, China in 2006. He is currently working in ZTE Corporation, engaged in communication power supply technology research and product development. His research interests include high efficiency and high power density power supply, topology development, EMC and loss optimization and magnetic integration technology.

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Abstract:

Rectifiers with high efficiency and high power density are crucial to the stable and efficient power supply of 5G communication base stations, which deserves in-depth investigation. In general, there are two key problems to be addressed: supporting both alternating current (AC) and direct current (DC) input, and minimizing the common-mode voltage as well as leakage current for safety reasons. In this paper, a hybrid five-level single-phase rectifier is proposed. A five-level topology is adopted in the upper arm, and a half-bridge diode topology is adopted in the lower arm. A dual closed-loop control strategy and a flying capacitor voltage regulation method are designed accordingly so that the compatibility of both AC and DC input is realized with low common voltage and small passive devices. Simulation and experimental results demonstrate the effectiveness and performance of the proposed rectifier.

Key words: multilevel rectifier, 5L-ANPC, low common-mode voltage, AC-DC hybrid input