Special Session/ 专题分会

Special Session 2: Control and Protection of Hybrid AC/DC Transmission Systems 混合交直流输电系统的控制和保护
Sohrab Mirsaeidi, School of Electrical Engineering, Beijing Jiaotong University (msohrab@bjtu.edu.cn);
Meng Li, School of Electrical Engineering, Beijing Jiaotong University (mengl@bjtu.edu.cn);
Jinghan He, School of Electrical Engineering, Beijing Jiaotong University (jhhe@bjtu.edu.cn)

Submit your paper via http://www.easychair.org/conferences/?conf=apet2022, and choose Special Session 2 option.

HVDC transmission systems have increasingly been used in modern power transmission networks due to their numerous advantages such as providing higher power transmission capacity over long distances, and interconnecting asynchronous systems. With the increasing deployment of DC transmission in existing AC networks, the possibility of AC and DC circuits running parallel to each other and sharing the same right-of-way or even the same tower is increasing, and hence hybrid AC/DC power grids are rapidly developing. The characteristics of hybrid AC/DC grids and conventional AC grids are different in various aspects. The non-complex controllability of HVDC systems provides a new choice for control of hybrid AC/DC power grids. However, currently, the HVDC control systems are not fully involved in the power flow and stability of hybrid power grids. In addition, the use of power electronic devices with limited thermal overload capability in HVDC technology reduces the overload capability of HVDC converters. This significantly influences the fault current level of the whole network. While the number of AC/DC interconnections gradually increases in the hybrid grids, the mutual influence between AC and DC systems becomes more pronounced. Therefore, hybrid AC/DC grids encounter new control and protection challenges. This special session is dedicated to identifying, addressing, and disseminating state-of-the-art research works in the field of hybrid AC/DC transmission systems.

Topics of interest for this special session include, but are not limited to:

- Methodologies for planning and operating hybrid AC/DC grids
- Modelling and analysis of electromechanical dynamics in hybrid AC/DC grids
- Co-simulation and hardware-in-the-loop simulations as a tool for the validation, testing, and verification of hybrid AC/DC grids
- Methods for monitoring and control of dynamic and transient stability of hybrid grids
- Innovations on the protection of hybrid grids including AC and DC fault ride-through techniques
- Novel approaches for commutation failure and cascading fault inhibition in hybrid AC/DC grids including LCCs
- Design, control, and protection of power converter technologies (LCC, VSC, and MMC)
- Advances in power apparatus enabling development and enhanced features in hybrid AC/DC grids such as DC transformers and DC circuit breakers
- Advanced synchronization schemes for enhancing dynamics response and stability
- New techniques of blackout restoration in the context of hybrid AC/DC grids.

Sohrab Mirsaeidi received his Ph.D. degree in Electrical Engineering from Universiti Teknologi Malaysia (UTM), Malaysia in 2016. Subsequently, he furthered his Postdoctoral Fellowship at the Department of Electrical Engineering, Tsinghua University, China from 2016 to 2019. Currently, he is an Associate Professor at the School of Electrical Engineering, Beijing Jiaotong University (BJTU), China. Sohrab Mirsaeidi has published 60+ papers and 2 books in the field of Microgrids and Large-Scale Power Systems. He is a Member of the National Technical Committee of Measuring Relays and Protection Equipment Standardization of China and has been involved in several national research projects in China. He is an Editorial Board Member for several international journals and a Regular Reviewer for IEEE Transactions journals. He has also served as Chair, Keynote/Invited Speaker, and Technical Committee Member in 50+ international conferences. His main research interests include Control and Protection of Large-Scale Hybrid AC/DC Grids and Microgrids, Power System Stability, and Application of Power Electronics in Power Systems. He is a Member of IEEE, IET, CIGRE, and Chinese Society for Electrical Engineering (CSEE).

Meng Li received the B.S. and Ph.D. degrees in electrical engineering from North China Electric Power University, Beijing, China, in 2003 and 2018, respectively. He is currently an Associate Professor with the School of Electrical Engineering, Beijing Jiaotong University, Beijing, China. His research interests include DC grid fault analysis, protection, and recovery.

Jinghan He was born in Beijing, China. She received her M.Sc. degree in Electrical Engineering from Tianjin University, Tianjin, China, in 1994, and the Ph.D. degree in electrical engineering from Beijing Jiaotong University, Beijing, China, in 2007. Since 2000, she has been a Professor with the School of Electrical Engineering, Beijing Jiaotong University. Her research interests include power systems relay protection, monitoring and protection of the railway traction power supply systems, DC grid and hybrid DC grid protection and control, renewable energy and smart grid. Prof. He is currently serving as a Chairman of IEEE PES China Membership Committee and a member of DC System Protection and Control Working Group under the IEEE PES China Subcommittee.