@article{Wang2026, 
author = {Keyou Wang and Chenxiang Gao and Jin Xu and Shiyao Qin and Chen Qi},
title = {State-space and Impedance Modeling Methods for Stability Analysis of Interconnected Power Electronic Systems},
year = {2026},
journal = {CSEE Journal of Power and Energy Systems},
volume = {12},
number = {4},
pages = {1740-1753},
keywords = {High penetration of renewables, impedance models, large-scale systems, power electronic systems, small-signal stability analysis, state-space models},
url = {https://www.sciopen.com/article/10.17775/CSEEJPES.2025.00900},
doi = {10.17775/CSEEJPES.2025.00900},
abstract = {With the high penetration of renewable energy sources and the extensive use of power electronic devices, power electronic systems (PESs) may exhibit oscillations featuring a wide frequency range, multiple device interactions, and widespread propagation. These features pose challenges for traditional state-space model (SSM)- and impedance model (IM)-based analysis, resulting in a significant need for efficient small-signal stability analysis methods for large-scale PESs. This paper comprehensively reviews the state-of-the-art small-signal stability analysis methods of large-scale PESs, including the novel SSM-based analysis, single-bus IM-based analysis, and multi-bus IM-based analysis. The fundamental concepts, evaluations, and development trends of these methods are systematically reviewed. Moreover, the frequency-scanning-based and data-driven black-box models for grid-tied converters are discussed. Finally, a comparative analysis of different methods is presented.}
}