A mode-in-state contribution factor based on Koopman operator and its application to power system analysis

Article Automation & Control Systems

On Analytical Construction of Observable Functions in Extended Dynamic Mode Decomposition for Nonlinear Estimation and Prediction

Marcos Netto et al.

Summary: In this study, an analytical construction of observable functions in the EDMD algorithm was proposed, starting from the dynamical system model and lifting it through the Lie derivatives into a polynomial form. This approach is applicable to a broader class of nonlinear dynamical systems and retains the physical interpretability of the underlying system. The proposed procedure outperforms existing methods in off-attractor nonlinear dynamics, as demonstrated in an application to electric power systems.

IEEE CONTROL SYSTEMS LETTERS (2021)

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Article Mathematics, Interdisciplinary Applications

Load margin for short-term voltage stability of an interconnected AC/MTDC system

Naoki Kawamoto et al.

Summary: This paper investigates the short-term voltage stability of the IEEE 9-bus system connected to a multi-terminal DC system based on VSC. The simulation results show that the introduction of AC voltage control in VSC can increase the load margin and enhance the short-term voltage stability without relying on the AC system.

IEICE NONLINEAR THEORY AND ITS APPLICATIONS (2021)

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Article Engineering, Electrical & Electronic