Frequency response modeling and online parameter adjustment of inverter-based source for off-grid renewable energy systems

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Analysis reveals robustness and effectiveness of the Levenberg–Marquardt method for parameter identification in off-grid systems.

Frequency response modeling improves performance and stability of inverter-based renewable energy systems, enhancing overall efficiency.
Simulation results demonstrate robustness in parameter identification, confirming the low-order model's practicality under various conditions.
Parameter identification method leverages the Levenberg–Marquardt approach to ensure effective adjustments during operation.
This model allows online updating, addressing challenges posed by low-damping and low-inertia scenarios in renewable energy applications.

Tang et al. (2025) studied this question.

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