Research Output
An improved perturb and observe (P&O) maximum power point tracking (MPPT) algorithm for higher efficiency
  This paper proposes a method to improve the efficiency of the P&O maximum power point tracker (MPPT) by reducing the steady state oscillation and eliminating the possibility of the algorithm to lose its tracking direction. A dynamic perturbation step-size is employed to reduce the oscillation, while boundary conditions are introduced to prevent it from diverging away from the MPP. To prove its effectiveness, the proposed P&O is compared with the conventional and adaptive P&O using the Ropp, sinusoidal and ramp irradiance tests. In addition, the performances are evaluated based on a one-day (10 h) irradiance and temperature profile. The algorithm is implemented on a buck-boost converter and benchmarked by the standard MPPT efficiency (ηMPPT) calculation. It was found that, for all the tests, the ηMPPT of the proposed P&O scheme is increased by approximately two percentage points. Besides, the proposed algorithm does not require any extra hardware components; only several lines of additional software codes are to be embedded into the conventional P&O MPPT control program.

  • Type:

    Article

  • Date:

    20 April 2015

  • Publication Status:

    Published

  • Publisher

    Elsevier

  • DOI:

    10.1016/j.apenergy.2015.04.006

  • ISSN:

    0306-2619

  • Funders:

    Historic Funder (pre-Worktribe)

Citation

Ahmed, J., & Salam, Z. (2015). An improved perturb and observe (P&O) maximum power point tracking (MPPT) algorithm for higher efficiency. Applied Energy, 150, 97-108. https://doi.org/10.1016/j.apenergy.2015.04.006

Authors

Keywords

Solar energy, Photovoltaic, P&O, MPPT, P–V curve, MPPT

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