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A Maximum Power Point Tracking Method Based on Perturb-and-Observe Combined With Particle Swarm Optimization

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3 Author(s)
K. L. Lian ; Power & Energy Group, Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan ; J. H. Jhang ; I. S. Tian

Conventional maximum power point tracking (MPPT) methods such as perturb-and-observe (P&O) method can only track the first local maximum point and stop progressing to the next maximum point. MPPT methods based on particle swarm optimization (PSO) have been proposed to track the global maximum point (GMP). However, the problem with the PSO method is that the time required for convergence may be long if the range of the search space is large. This paper proposes a hybrid method, which combines P&O and PSO methods. Initially, the P&O method is employed to allocate the nearest local maximum. Then, starting from that point on, the PSO method is employed to search for the GMP. The advantage of using the proposed hybrid method is that the search space for the PSO is reduced, and hence, the time that is required for convergence can be greatly improved. The excellent performance of the proposed hybrid method is verified by comparing it against the PSO method using an experimental setup.

Published in:

IEEE Journal of Photovoltaics  (Volume:4 ,  Issue: 2 )