Meshed DC microgrid hierarchical control: A differential flatness approach

Authors

I. Zafeiratou, I. Prodan, L. Lefèvre, L. Piétrac

Abstract

In this paper, a meshed DC microgrid control architecture whose goal is to manage load balancing and efficient power distribution is introduced. A novel combination of port-Hamiltonian (PH) modeling with differential flatness and B-splines parametrization is introduced and shown to improve the microgrid’s performance. A three layer supervision structure is considered: (i) B-spline parametrized flat output provide continuous profiles for load balancing and price reduction (high level); (ii) the profiles are tracked through a MPC implementation with stability guarantees (medium level); (iii) explicit switching laws applied to the DC/DC converters ensure appropriate power injection. Each level functions at a different time-scale (from slow to fast), and the control laws are chosen appropriately. The effectiveness of the proposed approach is evaluated by simulations over a DC microgrid composed by a collection of solar panels (PV), an energy storage system (ES), a utility grid (UG) and a consumers’ demand.

Keywords

DC microgrid; Meshed topology; Port-Hamiltonian systems; Differential flatness; Hierarchical control; Power balancing

Citation

• Journal: Electric Power Systems Research
• Year: 2020
• Volume: 180
• Issue:
• Pages: 106133
• Publisher: Elsevier BV
• DOI: 10.1016/j.epsr.2019.106133

BibTeX

@article{Zafeiratou_2020,
  title={{Meshed DC microgrid hierarchical control: A differential flatness approach}},
  volume={180},
  ISSN={0378-7796},
  DOI={10.1016/j.epsr.2019.106133},
  journal={Electric Power Systems Research},
  publisher={Elsevier BV},
  author={Zafeiratou, I. and Prodan, I. and Lefèvre, L. and Piétrac, L.},
  year={2020},
  pages={106133}
}

Download the bib file

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