Passivity-based control and stability analysis for hydro-turbine governing systems

Authors

Walter Gil-González, Alejandro Garces, Andrés Escobar

Abstract

Low-frequency oscillations can occur in hydropower systems under in the new context of power system and the classical controller for hydro-turbine governing systems need to be enhanced with the purpose of improving its stability. We propose a controller based on passivity theory with the aim of damping oscillations in a power system. Passivity-based control arises as a natural choice for hydro-turbine governing system since its open-loop dynamic has a port-Hamiltonian structure, which allows designing a controller that preserves the passive structure in closed-loop via interconnection and damping reassignment. The proposed controller considers the complete non-linear model of the system and guarantees global asymptotic stability in the sense of Lyapunov. Time-domain simulations demonstrate the robustness and proper performance of the proposed methodology under different operative conditions when is compared with the classical controllers.

Keywords

Hydro-turbine governing systems; Interconnection and damping assignment passivity-based control; Port-Hamiltonian; Single machine infinite bus

Citation

• Journal: Applied Mathematical Modelling
• Year: 2019
• Volume: 68
• Issue:
• Pages: 471–486
• Publisher: Elsevier BV
• DOI: 10.1016/j.apm.2018.11.045

BibTeX

@article{Gil_Gonz_lez_2019,
  title={{Passivity-based control and stability analysis for hydro-turbine governing systems}},
  volume={68},
  ISSN={0307-904X},
  DOI={10.1016/j.apm.2018.11.045},
  journal={Applied Mathematical Modelling},
  publisher={Elsevier BV},
  author={Gil-González, Walter and Garces, Alejandro and Escobar, Andrés},
  year={2019},
  pages={471--486}
}

Download the bib file

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