Port-Hamiltonian based control of water distribution networks

Authors

Richard Perryman, Joshua A. Taylor, Bryan Karney

Abstract

We design controllers for a nonlinear model of a water distribution network (WDN). Most existing approaches to the control of WDNs model the pumps as simple pressure gains. We show that a commonly used empirical model of a pump leads to a port-Hamiltonian (pH) and hence stable system. We use standard arguments to show that WDNs are incrementally pH, and show that local PI controllers preserve stability. These controllers are robust in that they do not require specific knowledge of the equilibrium input. We further show that controllers based on physical feedback that WDN operators usually rely on have merit in the pH framework. All of these controllers are shown to be useful in mitigating disturbances and tracking setpoints corresponding to assignable equilibria.

Keywords

incremental models, nonlinear systems, passivity, port-hamiltonian systems

Citation

Journal: Systems & Control Letters
Year: 2022
Volume: 170
Issue:
Pages: 105402
Publisher: Elsevier BV
DOI: 10.1016/j.sysconle.2022.105402

BibTeX

@article{Perryman_2022,
  title={{Port-Hamiltonian based control of water distribution networks}},
  volume={170},
  ISSN={0167-6911},
  DOI={10.1016/j.sysconle.2022.105402},
  journal={Systems \&amp; Control Letters},
  publisher={Elsevier BV},
  author={Perryman, Richard and Taylor, Joshua A. and Karney, Bryan},
  year={2022},
  pages={105402}
}

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