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Assessment, Cause Localization, and Mitigation for Small-Signal Stability Risks in Multi-Parallel Grid-Forming Converter Systems

Year: 2025
Type: article
Abstract: This article addresses small-signal stability issues for multi-parallel grid-forming converter systems based on a newly developed extended passivity theory. The proposed methods provide streamlined, decentralized stability conditions that cover the full frequency range with reduced conservativeness, serving as theoretical tools and practical guidelines for assessment, cause localization, and mitigation of small-signal instability risks in such systems. Numerical examples and experimental results are provided to verify the effectiveness of the proposed methods.
DOI: 10.1109/tsg.2025.3606195
Authors: Feifan Chen, Xiongfei Wang, Lennart Harnefors, Sei Zhen Khong, Jarno Kukkola, Mikko Routimo, Liang Zhao, Dan Wang, Henrik Sandberg, Kin Cheong Sou, Karl Henrik Johansson
Institutions: KTH Royal Institute of Technology, Tsinghua University, ABB (Sweden), National Sun Yat-sen University, ABB (Finland), Nanjing University
Language: English
Open Access status: hybrid
Estimated APC paid: $2,645
OpenAlex ID: W4413977930
FWCI: 4.958
Cites: 38
Cited by: 13
Related to: 10