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A Modified P&O Maximum Power Point Tracking Method with Reduced Steady State Oscillation and Improved Tracking Efficiency

Ahmed, Jubaer; Salam, Zainal


Zainal Salam


This paper proposes a method to reduce the steadystate oscillation and to mitigate the probability of losing the tracking direction of the perturb and observed (P&O)-based maximum power point tracking (MPPT) for PV system. The modified scheme retains the conventional P&O structure, but with a unique technique to dynamically alter the perturbation size. At the same time, a dynamic boundary condition is introduced to ensure that the algorithm will not diverge from its tracking locus. The modified P&O is simulated in MATLAB Simulink and its performance is benchmarked using the standard MPPT efficiency ηM P P T calculation. Furthermore, the proposed concept is validated experimentally using a buck-boost converter, fed by a solar PV array simulator (PVAS). Based on the EN 50530 dynamic irradiance tests, the proposed method achieved an average ηMP P T almost 1.1% higher than the conventional P&O when irradiance changes slowly and about 12% higher under fast change of irradiance.

Journal Article Type Article
Acceptance Date May 9, 2016
Online Publication Date May 12, 2016
Publication Date 2016-10
Deposit Date Dec 28, 2021
Journal IEEE Transactions on Sustainable Energy
Print ISSN 1949-3029
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 7
Issue 4
Pages 1506-1515
Keywords MPPT, P&O, P–V curve, PV, Solar, tracking MPP
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