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

作者：Ahmed, Jubaer^*; Salam, Zainal^*

来源：IEEE Transactions on Sustainable Energy, 2016, 7(4): 1506-1515.

DOI：10.1109/TSTE.2016.2568043

• MPPT
• P&O
• P-V curve
• PV
• Solar
• tracking MPP

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&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 bench-marked using the standard MPPT efficiency eta(MPPT) 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 eta(MPPT) almost 1.1% higher than the conventional P&O when irradiance changes slowly and about 12% higher under fast change of irradiance.

• 出版日期2016-10