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

Jubaer Ahmed and Zainal Salam

Applied Energy, 2015, vol. 150, issue C, 97-108

Abstract: 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 (10h) 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.

Keywords: Solar energy; Photovoltaic; P&O; MPPT; P–V curve; MPPT (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (68)

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DOI: 10.1016/j.apenergy.2015.04.006

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