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: 104
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: 2023
: .., .. - // . 104. .: , 2023. .100-117. DOI: https://doi.org/10.25728/ubs.2023.104.4
: , , , ,
(.): power system, modal analysis, Prony analysis, Lyapunov equation, spectral decomposition
: () . : . , , . , , . . -. , . , . IEEE 68. .
(.): Modern power grids are in need of advanced stability analysis tools due to their generation and consumption development trends. Lyapunov modal analysis combines two stability analysis approaches: modal analysis and Lyapunov functions spectral decomposition. Related currently available research requires a linear model of a studied system. Nevertheless, there is a significant interest in data-driven stability analysis methods based on measurements rather than pre-existing models. This motivates the presented study of measurement-based Lyapunov modal analysis feasibility. We derived new formulas for Lyapunov modal contributions calculation that based on data provided by Prony analysis of measurements captured in a nonlinear models or systems. We also conducted case studies using our software implementation of measurement-based Lyapunov modal analysis and node voltage transients measured in IEEE 68 power system model. The paper concludes with comparative analysis between measurement and model-based implementations.
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