中国电气工程学报(英文) ›› 2021, Vol. 7 ›› Issue (1): 1-26.doi: 10.23919/CJEE.2021.000001

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  • 收稿日期:2020-12-01 修回日期:2021-01-04 接受日期:2021-03-02 发布日期:2021-04-19

Benefits of High-voltage SiC-based Power Electronics in Medium-voltage Power-distribution Grids*

Fred Wang1,2, Shiqi Ji3,*   

  1. 1. Department of Electrical Engineering and Computer Science, The University of Tennessee, TN 37996, USA;
    2. Oak Ridge National Lab, Oak Ridge, TN 37830, USA;
    3. Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
  • Received:2020-12-01 Revised:2021-01-04 Accepted:2021-03-02 Published:2021-04-19
  • Contact: * E-mail: sxjisq@gmail.com
  • About author:Fred Wang received the B.S. degree from Xi'an Jiaotong University, Xi'an, China, in 1982, and the M.S. and Ph.D. degrees from the University of Southern California, Los Angeles, in 1985 and 1990, respectively, all in electrical engineering.He was a research scientist in the Electric Power Lab, University of Southern California, from 1990 to 1992. He joined the GE Power Systems Engineering Department, Schenectady, NY, as an application engineer in 1992. From 1994 to 2000, he was a senior product development engineer with GE Industrial Systems, Salem, VA. From 2000 to 2001, he was the manager of the Electronic and Photonic Systems Technology Lab, GE Global Research Center, Schenectady, NY, and Shanghai, China. In 2001, he joined the Center for Power Electronics Systems (CPES), Virginia Tech, Blacksburg, as a research associate professor and became an associate professor in 2004. From 2003, he also served as the CPES Technical Director. Since 2009, he has been with The University of Tennessee and Oak Ridge National Lab, Knoxville, TN, as a professor and Condra Chair of Excellence in Power Electronics. He is a founding member of the NSF/DOE Engineering Research Center for Ultra-Wide-Area Resilient Electric Energy Transmission Networks (CURENT) led by the University of Tennessee. His research interests include power electronics and power systems. Dr. Wang is a fellow of the IEEE and a fellow of the US National Academy of Inventors. Shiqi Ji received the B.S. and Ph.D. degrees from Tsinghua University, Beijing, China, in 2010 and 2015, respectively, both in electrical engineering.Since 2015, he joined the Ultra-Wide- Area Resilient Electric Energy Transmission Networks (CURENT), the University of Tennessee, Knoxville, TN, USA, and became a research assistant professor in 2019. Since 2020, he has been with Tsinghua University, Beijing, China, as an assistant professor. He has authored or co-authored more than 50 technical papers. His research interests include semiconductor device modeling, medium-voltage and high-power converter design, high-voltage SiC device characterization and application techniques, and grid-connected converter design.
  • Supported by:
    * DOE through Oak Ridge National Lab and the Power America Program, the Engineering Research Center Program of the National Science Foundation, and the CURENT Industry Partnership Program.

关键词: Silicon carbide power semiconductor, distribution grid, asynchronous microgrid, power-conditioning system

Abstract: Medium-voltage (MV) power electronics equipment has been increasingly applied in distribution grids, and high-voltage (HV) silicon carbide (SiC) power semiconductors have attracted considerable attention in recent years. This paper first overviews the development and status of HV SiC power semiconductors. Then, MV power-converter applications in distribution grids are summarized and the benefits of HV SiC in these applications are presented. Microgrids, including conventional and asynchronous microgrids, that can fully demonstrate the benefits of HV SiC power semiconductors are selected to investigate the benefits of HV SiC in detail, including converter-level benefits and system-level benefits. Finally, an asynchronous microgrid power-conditioning system (PCS) prototype using a 10 kV SiC MOSFET is presented.

Key words: Silicon carbide power semiconductor, distribution grid, asynchronous microgrid, power-conditioning system