An improved perturb and observe (P&O) maximum power point tracking (MPPT) algorithm for higher efficiency

作者：Ahmed, Jubaer; Salam, Zainal^*

来源：Applied Energy, 2015, 150: 97-108.

DOI：10.1016/j.apenergy.2015.04.006

• Solar energy
• Photovoltaic
• P&O
• MPPT
• P-V curve

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 MPFT efficiency (eta(MPPT)) calculation. It was found that, for all the tests, the eta(MPPT) 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.

• 出版日期2015-7-15