Recent Advances in Passivity-Based Control of Grid-Connected Converters

Date: 13/02/2025
Time: 10:00 am
Presenter: Chuan Xie & Shan He
Abstract: Increasing the integration of renewable energy sources has become a crucial pathway for decarbonizing power systems. As the interface between renewable generation and the power grid, grid-connected converters play a vital role in ensuring efficient and reliable power conversion. However, due to digital PWM, significant delays are introduced in the control loop leading to negative damping and harmonic instability when operating under widely varying grid impedances.

Passivity-based control presents a promising solution for shaping the output impedance of grid-connected converters. Specifically, the resistance of the output impedance should remain nonnegative across all frequencies, thus ensuring stable operation according to the Nyquist stability criterion. Over the past decade, the application of passivity-based control in grid-connected converters has seen significant progress. Early efforts focused on capacitor current damping, while recent advancements have expanded toward wideband damping and cost-effective implementations.

To further drive advancements in passivity-based control, this webinar will explore recent applications in various contexts including repetitive control, harmonic control, voltage regulation, and wideband damping strategies.
XIE HE
Chuan Xie (Senior Member, IEEE) received the B.S. degree in automation engineering from the University of Electronic Science and Technology of China (UESTC), Chengdu, China, and the Ph.D. degree in power electronics from Zhejiang University (ZJU), Hangzhou, China, in 2007 and 2012, respectively. Since 2012, he has been a Lecturer with the School of Automation Engineering, UESTC, where he was promoted to an Associate Professor in 2019. Since 2022, he has been a part-time Professor with Shenzhen Institute for Advanced Study at UESTC. From 2015 to 2016, he was a Visiting Scholar with the Department of Energy Technology, Aalborg University. His main research interests include digital control of power electronics, grid synchronization technology, distributed generation systems, microgrids and power quality.

Shan He (Senior Member, IEEE) received the B.S. degree from Northeast Electric Power University, Jilin, China, in 2015, the M.S. degree from Zhejiang University, Hangzhou, China, in 2018, and the Ph.D. from Aalborg University, Aalborg, Denmark, in 2022, all in electrical engineering. His research interests include grid-connected renewable system, power-to-x, reliability, battery management, and motor drive. Since 2022, he has been with the Department of Energy, Aalborg University as a postdoc. In 2021, he was a visiting researcher with Institute for Power Generation and Storage Systems, RWTH Aachen University, Aachen, Germany. In 2023, he was a research associate in Kiel University, Kiel, Germany. He received four conference awards and serves as Associate Editor for Protection and Control of Modern Power Systems.