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<p>Exploitation of the characteristic features of the photovoltaic IV and PV characteristics for optimal power extraction is popular as they are simple and straightforward. A novel strategy using the characteristic feature of PV array is presented in this paper, which is appropriate for both uniform and non-uniform irradiance conditions. A fictitious module characteristic is presumed for every peak in the PV characteristic, which is then replaced by an equivalent triangle. The peak points of the visualized triangles gave closest estimate of local maximum power points (MPPs). The estimation of such points was characterized by the determination of two slopes corresponding to the lines constituting the triangle for the peaks of the PV array. The estimation process was refined by taking into consideration the effect of different irradiances on different modules. The global maximum power point (GMPP) was estimated from the local MPPs. The deployment of adaptive perturb and observe (P&amp;O) technique was deployed to reach the GMPP finally. Evaluation of performance was done through simulations and experimentation. The results obtained have been encouraging that the tracking efficiency was more than 99% in all the cases without any divergence. The experimental procedure has been implemented through a low-cost digital signal processor.</p>

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A new improved method of global mpp estimation and tracking using dual slope technique with integrated adaptive P&O

  • 期刊论文

  • 发表日期：

    2025年6月30日

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  • L. J. Jenifer Suriya,
  • J. S. Christy Mano Raj

摘要

Exploitation of the characteristic features of the photovoltaic IV and PV characteristics for optimal power extraction is popular as they are simple and straightforward. A novel strategy using the characteristic feature of PV array is presented in this paper, which is appropriate for both uniform and non-uniform irradiance conditions. A fictitious module characteristic is presumed for every peak in the PV characteristic, which is then replaced by an equivalent triangle. The peak points of the visualized triangles gave closest estimate of local maximum power points (MPPs). The estimation of such points was characterized by the determination of two slopes corresponding to the lines constituting the triangle for the peaks of the PV array. The estimation process was refined by taking into consideration the effect of different irradiances on different modules. The global maximum power point (GMPP) was estimated from the local MPPs. The deployment of adaptive perturb and observe (P&O) technique was deployed to reach the GMPP finally. Evaluation of performance was done through simulations and experimentation. The results obtained have been encouraging that the tracking efficiency was more than 99% in all the cases without any divergence. The experimental procedure has been implemented through a low-cost digital signal processor.