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Research on Grid-Connected Control Strategy of Photovoltaic (PV) Energy Storage Based on Constant Power Operation

Author

Listed:
  • Tao Wang

    (Mechanical Engineering, College of Mechanical and Equipment Engineering, New Campus, Hebei University of Engineering, Handan 056038, China)

  • Cunhao Lin

    (Mechanical Engineering, College of Mechanical and Equipment Engineering, New Campus, Hebei University of Engineering, Handan 056038, China)

  • Kuo Zheng

    (Mechanical Engineering, College of Mechanical and Equipment Engineering, New Campus, Hebei University of Engineering, Handan 056038, China)

  • Wei Zhao

    (Mechanical Engineering, College of Mechanical and Equipment Engineering, New Campus, Hebei University of Engineering, Handan 056038, China)

  • Xinglu Wang

    (Mechanical Engineering, College of Mechanical and Equipment Engineering, New Campus, Hebei University of Engineering, Handan 056038, China)

Abstract

In order to effectively mitigate the issue of frequent fluctuations in the output power of a PV system, this paper proposes a working mode for PV and energy storage battery integration. To address maximum power point tracking of PV cells, a fuzzy control-based tracking strategy is adopted. The principles and corresponding mathematical models are analyzed for the three-phase voltage PWM converter and bidirectional DC/DC converter, while feedforward decoupling double closed loop, constant power (PQ), and constant voltage charge/discharge control strategies are proposed. Space vector pulse width modulation (SVPWM) technology is utilized to generate power switching tube driver signals. Finally, a simulation model is developed in MATLAB/Simulink for system analysis. The results demonstrate that the proposed method enables constant grid-connected power generation and constant voltage charging of the energy storage battery when the PV cell’s power generation exceeds that of the grid. When insufficient solar power generation occurs, both the PV system and energy storage battery work together to achieve constant grid-connected power.

Suggested Citation

  • Tao Wang & Cunhao Lin & Kuo Zheng & Wei Zhao & Xinglu Wang, 2023. "Research on Grid-Connected Control Strategy of Photovoltaic (PV) Energy Storage Based on Constant Power Operation," Energies, MDPI, vol. 16(24), pages 1-21, December.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:24:p:8056-:d:1299967
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    References listed on IDEAS

    as
    1. Kuo-Hua Huang & Kuei-Hsiang Chao & Ying-Piao Kuo & Hong-Han Chen, 2023. "Maximum Power Point Tracking of Photovoltaic Module Arrays Based on a Modified Gray Wolf Optimization Algorithm," Energies, MDPI, vol. 16(11), pages 1-21, May.
    2. Pairach Kitworawut & Nipon Ketjoy & Tawat Suriwong & Malinee Kaewpanha, 2023. "Best Practice in Battery Energy Storage for Photovoltaic Systems in Low Voltage Distribution Network: A Case Study of Thailand Provincial Electricity Authority Network," Energies, MDPI, vol. 16(5), pages 1-23, March.
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