Research on Energy Shaping Control Technology of Grid-Connected Inverters Under Weak Grid Conditions

Authors

Abstract

There are numerous nonlinear components in grid-connected inverter systems, such as the output saturation nonlinearity of the grid-connected current control system and the dead-time nonlinearity existing in pulse width modulation (PWM) strategies. Traditional linear control strategies based on linearized models struggle to ensure the system operates with strong robustness and global stability. To address this issue, this paper proposes an energy shaping control strategy based on the Port-Controlled Hamiltonian (PCH) model, investigating the stability of the Grid-Connected Inverter (GCI) system from the perspective of energy control. Firstly, this strategy constructs the PCH model of the GCI system in the dq coordinate system. Then, by using the interconnection and damping assignment method, the energy shaping control law is derived. This law modifies the energy flow and energy dissipation modes of the closed-loop GCI system, thereby achieving the global asymptotic stability of the system. Simulation and experimental results demonstrate that the energy shaping control strategy is simple in structure and exhibits excellent transient performance. Meanwhile, it ensures the GCI system maintains global stability and strong robustness under weak grid conditions.

Citation

Journal: 2025 IEEE 7th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)
Year: 2025
Volume:
Issue:
Pages: 1287–1293
Publisher: IEEE
DOI: 10.1109/imcec66174.2025.11331603

BibTeX

@inproceedings{Ding_2025,
  title={{Research on Energy Shaping Control Technology of Grid-Connected Inverters Under Weak Grid Conditions}},
  DOI={10.1109/imcec66174.2025.11331603},
  booktitle={{2025 IEEE 7th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)}},
  publisher={IEEE},
  author={Ding, Xin and Chen, Qianjun and Qin, Manli},
  year={2025},
  pages={1287--1293}
}

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References

Xu J, Xie S, Zhang B, Qian Q (2018) Robust Grid Current Control With Impedance-Phase Shaping for LCL-Filtered Inverters in Weak and Distorted Grid. IEEE Trans Power Electron 33(12):10240–10250. https://doi.org/10.1109/tpel.2018.280860 – 10.1109/tpel.2018.2808604
Holtz J (2016) Advanced PWM and Predictive Control—An Overview. IEEE Trans Ind Electron 63(6):3837–3844. https://doi.org/10.1109/tie.2015.250434 – 10.1109/tie.2015.2504347
Guo, Generalized proportional complex integral control strategy for photovoltaic grid-connected inverters[J]. Proceedings of the CSEE (2015)
Lin P, Shi Y, Sun X-M (2022) A Class of Nonlinear Active Disturbance Rejection Loop Filters for Phase-Locked Loop. IEEE Trans Ind Electron 69(2):1920–1928. https://doi.org/10.1109/tie.2021.306066 – 10.1109/tie.2021.3060663
Viola G, Ortega R, Banavar R, Acosta JA, Astolfi A (2007) Total Energy Shaping Control of Mechanical Systems: Simplifying the Matching Equations Via Coordinate Changes. IEEE Trans Automat Contr 52(6):1093–1099. https://doi.org/10.1109/tac.2007.89906 – 10.1109/tac.2007.899064
Yokoyama K, Takahashi M (2016) Dynamics-Based Nonlinear Acceleration Control With Energy Shaping for a Mobile Inverted Pendulum With a Slider Mechanism. IEEE Trans Contr Syst Technol 24(1):40–55. https://doi.org/10.1109/tcst.2015.241749 – 10.1109/tcst.2015.2417499
Song HH, Qu YB (2011) Energy-based modelling and control of wind energy conversion system with DFIG. International Journal of Control 84(2):281–292. https://doi.org/10.1080/00207179.2010.55006 – 10.1080/00207179.2010.550064
Fang F, Li Y, Zhang R, Liu Y (2017) An nonlinear control strategy for single-phase Quasi-Z-source grid-connected inverter. IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society 7685–769 – 10.1109/iecon.2017.8217347