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A modified P and O maximum power point tracking method with reduced steady-state oscillation and improved tracking efficiency

Ahmed, J. and Salam, Z. (2016) A modified P and O maximum power point tracking method with reduced steady-state oscillation and improved tracking efficiency. IEEE Transactions on Sustainable Energy, 7 (4). pp. 1506-1515. ISSN 1949-3029

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Official URL: https://www.scopus.com/inward/record.uri?eid=2-s2....

Abstract

This paper proposes a method to reduce the steady-state oscillation and to mitigate the probability of losing the tracking direction of the perturb and observed (P and O)-based maximum power point tracking (MPPT) for PV system. The modified scheme retains the conventional P and 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 and O is simulated in MATLAB Simulink and its performance is benchmarked using the standard MPPT efficiency ηMPPT 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 ηMPPT almost 1.1% higher than the conventional P and O when irradiance changes slowly and about 12% higher under fast change of irradiance.

Item Type:Article
Uncontrolled Keywords:Efficiency, Maximum power point trackers, Photovoltaic cells, Buck boost converter, Dynamic boundary conditions, Maximum Power Point Tracking, Perturbation size, PV curves, Solar, Steady state oscillation, Tracking direction, DC-DC converters
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:72029
Deposited By: Fazli Masari
Deposited On:26 Nov 2017 03:37
Last Modified:26 Nov 2017 03:37

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