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<p>Energy storage in a grid-tied photovoltaic (PV) system ensures grid stability against variable environmental conditions and grid outages. This study introduces the third-order field-oriented sliding mode control as a novel control strategy specifically applied to brushless direct current (BLDC) drives in the pump hydro energy storage (PHES) system, addressing the limitations of the conventional proportional-integral (PI) controller. The proposed method combines the robustness of third-order sliding mode control (TOSMC) with the precision of field-oriented control (FOC) to optimize system performance. This paper presents an analysis of a BLDC machine in the PHES system in the application of a grid-tied PV network. The article investigates the proposed topology with the control mechanism under dynamic solar irradiation, load demand scenarios, and fault conditions. The applicability and effectiveness of the overall system were simulated in the MATLAB/Simulink environment, showing the system's stability and achieving a coupled-bidirectional power flow, effectively attaining optimal power point operation and maintaining total harmonic distortion as per IEEE standards. Furthermore, a comparative analysis against FOC-PI and FOC-TOSMC was performed, demonstrating that the conventional proportional-integral controller underperformed in terms of overshoot, undershoot, and settling time. Additionally, the proposed system was validated on a prototype developed in the laboratory.</p>

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Performance evaluation of a TOFOSMC-based pump hydro energy storage in the application of grid-connected photovoltaic system

  • 期刊论文

  • 发表日期：

    2025年4月24日

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  • Edapha Rhema Jones Chullai,
  • Haricharan Nannam,
  • Priyankar Roy,
  • Rakesh Roy,
  • Atanu Banerjee

摘要

Energy storage in a grid-tied photovoltaic (PV) system ensures grid stability against variable environmental conditions and grid outages. This study introduces the third-order field-oriented sliding mode control as a novel control strategy specifically applied to brushless direct current (BLDC) drives in the pump hydro energy storage (PHES) system, addressing the limitations of the conventional proportional-integral (PI) controller. The proposed method combines the robustness of third-order sliding mode control (TOSMC) with the precision of field-oriented control (FOC) to optimize system performance. This paper presents an analysis of a BLDC machine in the PHES system in the application of a grid-tied PV network. The article investigates the proposed topology with the control mechanism under dynamic solar irradiation, load demand scenarios, and fault conditions. The applicability and effectiveness of the overall system were simulated in the MATLAB/Simulink environment, showing the system's stability and achieving a coupled-bidirectional power flow, effectively attaining optimal power point operation and maintaining total harmonic distortion as per IEEE standards. Furthermore, a comparative analysis against FOC-PI and FOC-TOSMC was performed, demonstrating that the conventional proportional-integral controller underperformed in terms of overshoot, undershoot, and settling time. Additionally, the proposed system was validated on a prototype developed in the laboratory.