An Improved Variable Step Size MPPT Algorithm Based on INC


Vol. 15, No. 2, pp. 487-496, Mar. 2015
10.6113/JPE.2015.15.2.487


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 Abstract

In order to ensure that photovoltaic (PV) systems work at the maximum power point (MPP) and maximize the economicbenefits, maximum power point tracking (MPPT) techniques are normally applied to these systems. One of the most widelyapplied MPPT methods is the incremental conductance (INC) method. However, the choice of the step size still remainscontroversial. This paper presents an improved variable step size INC MPPT algorithm that uses four different step sizes. Thismethod has the advantages of INC but with the ability to validly adjust the step size to adapt to changes of the PV’s power curve. The presented algorithm also simultaneously achieves increased rapidity and accuracy when compared with the conventionalfixed step size INC MPPT algorithm. In addition, the theoretical derivation and specific applications of the proposed algorithmare presented here. This method is validated by simulation and experimental results.


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Cite this article

[IEEE Style]

Z. Xu, P. Yang, D. Zhou, P. Li, J. Lei, Y. Chen, "An Improved Variable Step Size MPPT Algorithm Based on INC," Journal of Power Electronics, vol. 15, no. 2, pp. 487-496, 2015. DOI: 10.6113/JPE.2015.15.2.487.

[ACM Style]

Zhi-rong Xu, Ping Yang, Dong-bao Zhou, Peng Li, Jin-yong Lei, and Yuan-rui Chen. 2015. An Improved Variable Step Size MPPT Algorithm Based on INC. Journal of Power Electronics, 15, 2, (2015), 487-496. DOI: 10.6113/JPE.2015.15.2.487.