TY  - JOUR
AU  - Wang, Keyou
AU  - Gao, Chenxiang
AU  - Xu, Jin
AU  - Qin, Shiyao
AU  - Qi, Chen
PY  - 2026
TI  - State-space and Impedance Modeling Methods for Stability Analysis of Interconnected Power Electronic Systems
JO  - CSEE Journal of Power and Energy Systems
SN  - 2096-0042
SP  - 1740
EP  - 1753
VL  - 12
IS  - 4
AB  - 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.
UR  - https://doi.org/10.17775/CSEEJPES.2025.00900
DO  - 10.17775/CSEEJPES.2025.00900