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As an emerging research direction and hotspot in the field of DC power grids, DC transformers are key equipment for efficient integration and conversion of new energy and energy storage, which have received extensive attention from the international academia and industry. However, the research on the theories and equipment technologies of medium and high-voltage large-capacity DC transformers is still in the early stage, and there are still many scientific challenges and technical problems in the process of practical application and large-scale generalization.

In order to promote academic exchanges and the application technology progress in DC transformer related fields, China Electrotechnical Society is scheduled to hold the “Youth Salon of China Association for Science and Technology and the 15th Youth Salon of China Electrotechnical Society" during the annual academic conference of China Electrotechnical Society on September 26, 2021, focusing on the frontier technologies and development trend of DC transformers, discussing the latest research progress, technical bottlenecks and challenges in this field, expanding academic exchanges among young scholars in the field of DC transformers of China, and strengthening the inter-disciplinary integration. Zhao Biao, associate professor of the Department of Electrical Engineering and director of the Power Conversion Research Office, DC Research Center of Energy Internet Research Institute, Tsinghua University served as the convener of this salon.

I. Salon time: 09:00-12:00, September 26, 2021

II. Salon place: Meeting Room 20, Floor 3, Convention Building, Beijing Convention Center

III. Salon theme: Frontier Technologies and Development Trend of DC transformers

IV. Organization

Host: Training and Talent Service Center of China Association for Science and Technology, China Electrotechnical Society

Co-host: Youth Working Committee of China Electrotechnical Society; Department of Electrical Engineering, State Key Laboratory of Safety Control and Simulation of Power Systems and Large Power Generation Equipment, Energy Internet Innovation Research Institute, Sichuan Energy Internet Research Institute of Tsinghua University

V. Salon agenda





Opening ceremony

Song Qiang


Leader's speech: China Association for Science and Technology


Leader's speech: Han Yi, Secretary-General, China Electrotechnical Society


Leader's speech: Zheng Zedong, Deputy Secretary of the Party Committee, Department of Electrical Engineering, Tsinghua University


Youth supervisor's speech: Zeng Rong, Professor, Department of Electrical Engineering, Tsinghua University


Academic Frontier Reports

Zhao Biao


Report 1: 3-phase triple voltage dual active bridge converter (T2-DAB) and its application in DC transformers

Chen Wu, Professor, Southeast University


Report 2: Theoretic research and prototype experiment of high voltage DC-DC autotransformer series technology

Lin Weixing, Researcher, Huazhong University of Science and Technology


Report 3: Instantaneous flux control and short-circuit fault ride-through method of DC transformer

Hu Jingxin, Researcher, Aachen University of Technology, Germany


Industry Development Reports


Report 4: Research on Application Technology of Medium Voltage DC Transformer

Mei Hongming, Deputy General Manager of DC Business Division and Senior Engineer , Beijing Sifang Automation Co., Ltd.,


Report 5: Research on 10kV DC Transformer Development and Test Technology

Feng Lei, Senior Engineer, Xi'an Xidian Power System Co., Ltd.


Report 6: Design and manufacture of MW-class intermediate frequency isolation transformers for DC transformers

Xiao Ning, Deputy General Manager/Senior Engineer, Zhuzhou CRRC Qihong Heat Dissipation Technology Co., Ltd.


Application Status Reports


Report 7: Application of medium and low voltage DC power distribution system and DC transformers

Xu Feng, Senior Engineer, State Grid Zhejiang Electric Power Research Institute


Report 8: Research and Practice of DC Power Distribution System Based on Power Electronic Transformer

Zeng Jie, Senior Engineer, China Southern Power Grid Power Technology Co., Ltd.


Report 9: Research and Demonstrative Application of Key Technologies of "Integration of Source, Network, Load and Storage" in Ulanqab

Yin Likun, Director/Senior Engineer, China Three Gorges Group Co., Ltd.


Industry Standard Reports


Report 10: Development and Recommendations of Standards for Flexible DC Transmission

Xu Fan, Deputy Chief Engineer/Senior Engineer, Xi'an High Voltage Apparatus Research Institute



VI. Notices for Participation

(1) Salon Registration

There is no registration fee for this salon, but participants are requested to complete the registration before September 24, 2021. The number of applicants for this salon is controlled within 100 until the registration is full. Please click on the link or scan the QR code below to register online and submit participation information. Registration link:


QR code for registration

Salon exchange group

If you are interested in participating in the academic annual conference of the China Electrotechnical Society held at the same time, please go to the following website and register for the conference (http://www.acces.org.cn/).

(2) Accommodation and transport

No accommodation or transport will be arranged uniformly. Please arrange by yourself. Also please go to the salon site by yourself.

VII. Contact information

China Electrotechnical Society, Fu Yandong, 13693502726

Tsinghua University, Han Xuejiao, 13811188645

Brief about the Salon Convener


Zhao Biao, Associate Professor and Doctoral Supervisor of Department of Electrical Engineering, Tsinghua University, IEEE Senior Member; He is mainly engaged in the research on flexible DC transmission and distribution, modular multi-level converters, DC transformers, and high-power power electronic devices, etc. His research achievements are applied to flexible and direct converter valves and DC transformers of Xidian Power Systems, Rongxin Huike, Beijing Sifang and many other companies.

In the past 5 years, he has presided over more than 10 scientific research projects, including 2 projects of the National Natural Science Foundation; published more than 80 SCI/EI papers in domestic and foreign journals and conferences, which were cited more than 5000 times; published 1 domestic monograph as the first author, participated in the compilation of 1 international monograph, applied for and was granted more than 20 invention patents; won 3 provincial and ministerial scientific and technological achievement awards including the Science and Technology Progress Award of China Machinery Industry Association. He was selected as Elsevier 2019 and 2020 China Highly Cited Scholars, selected into the 5th Young Talents Promotion Project of China Association for Science and Technology, and appointed the convener for the first power electronic transformer international standard IEC/SC 22F/AHG 6 working group.

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