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

Ahmed, Jubaer; Salam, Zainal

Abstract

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.

Citation

Ahmed, J., & Salam, Z. (2016). A Modified P&O Maximum Power Point Tracking Method with Reduced Steady State Oscillation and Improved Tracking Efficiency. IEEE Transactions on Sustainable Energy, 7(4), 1506-1515. https://doi.org/10.1109/TSTE.2016.2568043

• 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
• DOI: https://doi.org/10.1109/TSTE.2016.2568043
• Keywords: MPPT, P&O, P–V curve, PV, Solar, tracking MPP
• Public URL: http://researchrepository.napier.ac.uk/Output/2823303