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Stability analysis of frequency small signal of grid-connected VSG based on passivity-based control

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Publicado en:Journal of Physics: Conference Series vol. 2936, no. 1 (Jan 2025), p. 012035
Autor principal: Xi, Wenxin
Otros Autores: Huang, Ming, Lin, Yechen
Publicado:
IOP Publishing
Materias:
Parameter identification
Stability analysis
Roots
Control systems
Control stability
Distributed generation
Frequency stability
Synchronous machines
Frequency analysis
Acceso en línea:Citation/Abstract
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Resumen:To achieve better frequency stability, the voltage and current inner loop control strategy based on Euler-Lagrange passivity-based control (EL-PBC) is used to replace the traditional PI control of microgrids under complex power grid conditions. To analyze the frequency stability of the grid-connected Virtual Synchronous Generators (VSG) system under disturbance conditions, a general small-signal model for a VSG system under EL-PBC is established. All characteristic roots of the system are obtained, and participation factors are calculated to identify the dominant state variables corresponding to these characteristic roots. A comparative analysis of the characteristic roots of the EL-PBC system versus traditional control systems is conducted. It shows that the frequency stability is better under passivity-based control under disturbance, and the influence of passivity-based control parameters on the characteristic roots is analyzed. Finally, the correctness of the theoretical analysis is verified by simulation.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2936/1/012035
Fuente:Advanced Technologies & Aerospace Database