Unified energy shaping control strategy for grid-connected photovoltaic systems

Authors

Manyuan Ye, Chaodong Li, Junda Zhang, Huihui Song

Abstract

The power generation of photovoltaic (PV) systems is significantly influenced by atmospheric conditions. The irregular energy exchange between the input (PV) and output (grid) sides can lead to oscillations in the DC-link voltage, which can adversely affect the stability and energy-harvesting efficiency of the system. To address this issue, a unified energy shaping control (UESC) strategy is proposed for grid-connected photovoltaic systems to improve the dynamic performance of the system. The traditional energy shaping control (ESC) strategy controls the DC-link voltage and grid-connected current independently, with the DC-link voltage controlled by a PI controller. However, the proposed UESC strategy is based on the unified port-controlled Hamiltonian (PCH) model in the synchronous reference frame for the entire PV system, which simultaneously controls the DC-link voltage and the grid-connected current. Simulation and experimental results demonstrate that the UESC strategy exhibits superior stability and dynamic performance compared to the traditional ESC strategy.

Keywords

energy shaping control, grid-connected photovoltaic system, hamiltonian energy function, port-controlled hamiltonian model

Citation

• Journal: Journal of Power Electronics
• Year: 2025
• Volume:
• Issue:
• Pages:
• Publisher: Springer Science and Business Media LLC
• DOI: 10.1007/s43236-025-01210-2

BibTeX

@article{Ye_2025,
  title={{Unified energy shaping control strategy for grid-connected photovoltaic systems}},
  ISSN={2093-4718},
  DOI={10.1007/s43236-025-01210-2},
  journal={Journal of Power Electronics},
  publisher={Springer Science and Business Media LLC},
  author={Ye, Manyuan and Li, Chaodong and Zhang, Junda and Song, Huihui},
  year={2025}
}

Download the bib file

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