PLEASE JOIN OUR FRIDAY SEMINARS

The CCCN-CityU-PolyU Joint Seminar Series began in 2001, and has since become regular weekly meetings for visitors, faculty, researchers and students to discuss latest progresses in their research.

The next seminar is:

Date & Time: March 13, 2026, Friday, 4:30pm-5:30pm
Title: Coupling and Clustering of Grid-Forming and Grid-Following Converters in Islanded Microgrids

Speaker: Dr Jingxi Yang, City University of Hong Kong

Venue: FYW-3316, CityU
Zoom ID 838 3173 9694
Password 123456

Abstract:
In an islanded microgrid containing a number of grid-forming and grid-following converters (GFMCs and GFLCs), the GFMCs splits into at least two internally synchro- nized clusters under a sufficiently large transient disturbance, and the GFLCs interact with these clusters to manifest diversified behaviors, e.g., being absorbed into one of the aforementioned clusters, or temporarily joining one of the clusters, or forming a new cluster alone. Such behaviors are dependent on the GFLCs’ injected reactive power, network structure and edge weights. These factors can be adjusted to absorb more GFLCs into the dominant cluster of the microgrid. These findings are verified by a modified IEEE 39-bus power grid.

Speaker's Bio:
Jingxi Yang received the B.S. and Ph.D. degrees in electrical engineering from Beijing Jiaotong University, Beijing, China, in 2014 and 2020, respectively. He is currently a Research Fellow with the Department of Electrical Engineering, City University of Hong Kong, Hong Kong. His research interests include the complex nonlinear behavior and stability of grid-connected power electronic converter systems. He was the recipient of the Outstanding Reviewer Award of the IEEE Transactions on Power Electronics in 2021 and 2024, and the Excellent Reviewer Award of the Journal of Modern Power Systems and Clean Energy in 2022. He is a member of the IEEE Power and Energy Circuits and Systems Technical Committee.

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Our Mission

The Centre for Complexity and Complex Networks aims to conduct emerging and cutting-edge research in the multidisciplinary area of complex systems and networks, including fundamental theory in dynamical networked systems and cyber physical systems, and applications in

epidemic progression modelling
energy systems and power grids
information and communication systems
transportation networks
resilience of critical infrastructures
cryptocurreny and blockchains
business and finance

Through the significant and groundbreaking contributions of its members to the fundamental theory of nonlinear science and applications over the past 20 more years, the centre has established itself as one of the leading research centres in the world focusing on nonlinear science, complexity and complex systems.

Our centre promotes inter-institutional and interdisciplinary collaborations, and supports the industrial and business development of Hong Kong and the mainland via technology transfer and joint research projects.

WHAT'S NEWS

Congratulations to Prof. Michael Tse on his being inducted to the Hong Kong Academy of Engineering as its Fellow.

The Hong Kong Academy of Engineering announced on November 26, 2025, the induction of twelve exceptional professionals as Fellows, who were elected at its 32nd annual general meeting on September 8, 2025 and were formally inducted at a ceremony held on November 24, 2025 at HOPEWELL Hotel. The citation for Prof. Tse's election is "For pioneering contributions in power electronics, including ultra-fast-transient voltage regulation, sliding-mode control for converters, robust EV charging, and wireless power transfer."

Congratulations to Prof. Ron Chen on being awarded The Ichtiaroglou Award
The Ichtiaroglou Award recognizes Prof. Chen's lifetime achievement in Nonlinear Systems Theory. The award ceremony will be held at the Second DANOC Days of Applied Nonlinearity and Complexity in January 2026.

Our Centre and The Applied Mathematical Science Research Centre of Jiangsu Province have recently signed an MoU to promote academic research, exchange, and sharing of results and resource, aiming to promote high-quality research and knowledge transfer in areas of complex systems, networks, applied mathematics. This agreement will strengthen the collaborative relationship between the two centres, and foster talent exchange and development between Hong Kong and Jiangsu Province.

Congratulations!

Prof Ron Chen was elected as NetSci Fellow 2025! The NetSci Fellowship recognizes researchers who have made outstanding and significant contributions to network science research and to the community of network scientists. Elected nominees are named Fellows of the Network Science Society. The Fellowship will be awarded each year to up to 7 members of the community on the basis of their exceptional life-long individual contributions to any area of network science research and to the community of network scientists (locally and globally). All members of the community are eligible for nomination and election to the Fellowship. Selection from the pool of nominees will be conducted by the Fellowship Committee, to be appointed by the Network Science Society board and composed of a minimum of 4 prominent researchers active in the area of network science.

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Released October 2024

PLEASE JOIN OUR FRIDAY SEMINARS

Our Mission

Date & Time:	March 13, 2026, Friday, 4:30pm-5:30pm
Title:	Coupling and Clustering of Grid-Forming and Grid-Following Converters in Islanded Microgrids
Speaker:	Dr Jingxi Yang, City University of Hong Kong
Venue:	FYW-3316, CityU Zoom ID 838 3173 9694 Password 123456
Abstract:	In an islanded microgrid containing a number of grid-forming and grid-following converters (GFMCs and GFLCs), the GFMCs splits into at least two internally synchro- nized clusters under a sufficiently large transient disturbance, and the GFLCs interact with these clusters to manifest diversified behaviors, e.g., being absorbed into one of the aforementioned clusters, or temporarily joining one of the clusters, or forming a new cluster alone. Such behaviors are dependent on the GFLCs’ injected reactive power, network structure and edge weights. These factors can be adjusted to absorb more GFLCs into the dominant cluster of the microgrid. These findings are verified by a modified IEEE 39-bus power grid.
Speaker's Bio:	Jingxi Yang received the B.S. and Ph.D. degrees in electrical engineering from Beijing Jiaotong University, Beijing, China, in 2014 and 2020, respectively. He is currently a Research Fellow with the Department of Electrical Engineering, City University of Hong Kong, Hong Kong. His research interests include the complex nonlinear behavior and stability of grid-connected power electronic converter systems. He was the recipient of the Outstanding Reviewer Award of the IEEE Transactions on Power Electronics in 2021 and 2024, and the Excellent Reviewer Award of the Journal of Modern Power Systems and Clean Energy in 2022. He is a member of the IEEE Power and Energy Circuits and Systems Technical Committee.