讲座主题：DC Solid-State Transformers for DC Transmission and Distribution: From Fundamentals to Applications
讲座人：Prof. Binbin Li, Harbin Institute of Technology; Prof. Jingxin Hu, Nanjing University of Aeronautics and Astronautics;  A. prof. Yingzong Jiao, Harbin Institute of Technology
讲座摘要：
With the increased penetration of renewable energy sources and ubiquitous power electronics apparatus, DC power is making a comeback. In the generation aspect, the PV, wind, and energy storage are inherently DC sources. For transmission, the HVDC has become the feasible solution for transmitting a large amount of power over long distance or submarine/underground cables. For distribution, the MVDC is more capable of accommodating a higher penetration of renewable energy and friendly to EV charging stations and Data centers. Therefore, DC system is of increasing interests in both academics and industries.
  Nevertheless, as an analogy of line-frequency transformers in AC systems, DC system also requires such a device to exchange power between networks with different voltage levels. As a DC circuit does not satisfy the law of Electromagnetic Induction, it is not possible to use magnetic transformers to convert DC voltage directly without engagement of power electronics technology. Although the DC/DC power-electronic converters have been extensively studied and applied at low-power applications, scaling these topologies to tens or hundreds of kilovolts and megawatt power levels presents significant challenges related to loss, cost, dv/dt, and semiconductor ratings. To overcome these limitations, several novel high-power DC/DC converter topologies have been proposed and demonstrated during the last few years.
  This tutorial systematically reviews the latest developments high-power DC/DC converter technologies. It begins with an introduction to the applications for high-power DC/DC converters, followed by a review of the basics and widely used converter solutions. The tutorial then delves into three main themes:
  1) DC/DC converters for interconnecting LVDC and MVDC systems: state-of-the-art dual-active bridge (DAB) and series resonant converters (SRC) based modular solutions will be reviewed comparatively along with their latest advanced control and protection schemes, practical industry applications are demonstrated, highlighting the versatility and implementation of these converters.
  2) DC/DC converters for MVDC and HVDC interconnection: the novel converter solution that combines the thyristor technology with the MMC will be presented, and the converter is further enhanced for application of all DC offshore wind farms.
  3) DC/DC converters for interconnection of HVDC systems with different voltage levels: techniques and solutions for efficiently managing HVDC voltage and methods to integrate HVDC circuit breaker are explored.
  Finally, a summary and outlook are provided. In this tutorial, attendees will gain insights into various converters, their operational techniques and related demonstration projects, supported by simulation and experimental examples.
作者简介：
Binbin Li received his PhD degree in Electrical Engineering from Harbin Institute of Technology (HIT), China, and is currently Professor in School of Electrical Engineering and Automation, HIT. He has been selected in the Young Elite Scientists Sponsorship Program by China Association for Science and Technology. Currently, he is associate editor of IEEE Transactions on Power Electronics, IEEE Open Journal of the Industrial Electronics Society and member of Editorial Board for Journal of Power System Protection and Control. He holds more than 20 patents and has collaborated with the industries developing a series mega-watt DC solid-state transformers, and published more than 50 journal papers in the field of modular high-power converters. He has given a number of tutorials in the conferences such as PEAC2018, IECON2019, IECON2020, ECCE-Asia 2020, ECCE-Europe 2023.

Jingxin Hu received the B.S. degree from Northeastern University, Shenyang, China, in 2010, and the M.Sc. degree and the Dr.-Ing. degree (summa cum laude) from RWTH Aachen University, Aachen, Germany, in 2013 and 2019, all in electrical engineering. He was with ABB Corporate Research Center (Switzerland) in 2012 and General Electric Global Research Center (Germany) from 2013 to 2014. He was a Research Associate (2014-2019) and Senior Scientist (2019-2022) with E.ON Energy Research Center, RWTH Aachen University, Germany. Since 2022, he has become a Full Professor at Nanjing University of Aeronautics and Astronautics, China. Dr. Hu was a recipient of the Prize Paper Award of IEEE IPEC ECCE Asia in 2018, the STAWAG Best Dissertation Prize of RWTH Aachen University in 2019, and IEEE TPEL Outstanding Reviewer Award in 2021 and 2023. He serves as Guest Editor and Guest Associate Editor of IEEE Transactions on Power Electronics, Associate Editor for the Journal of Power Supply, Technical Program Committee Co-Chair of IEEE eGrid 2020, and Session Chairs of several IEEE international conferences. Dr. Hu is also a member of the IEEE P3105 standard working group dedicated to solid-state transformers. His main research interests include solid-state transformers, intelligent energy routers, renewable power generation and energy storage, as well as dc transmission and distribution.

Yingzong Jiao received his Ph.D. degree in Electrical Engineering from Zhejiang University (ZJU), China, and is currently assitant Professor at the School of Electrical Engineering and Automation, Harbin Institute of Technology (HIT). He published more than 10 papers in the field of power electronics and power systems integrated with renewable generations. He received the best paper in the conference of HVDC 2020.