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Energies 2016, 9(4), 288; doi:10.3390/en9040288

A High-Performance Adaptive Incremental Conductance MPPT Algorithm for Photovoltaic Systems

1
School of Electric Power, South China University of Technology, Guangzhou 510640, China
2
School of Automation Science and Engineering, South China University of Technology, Guangzhou 510640, China
*
Author to whom correspondence should be addressed.
Academic Editor: Gabriele Grandi
Received: 22 December 2015 / Revised: 31 March 2016 / Accepted: 1 April 2016 / Published: 15 April 2016
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Abstract

The output characteristics of photovoltaic (PV) arrays vary with the change of environment, and maximum power point (MPP) tracking (MPPT) techniques are thus employed to extract the peak power from PV arrays. Based on the analysis of existing MPPT methods, a novel incremental conductance (INC) MPPT algorithm is proposed with an adaptive variable step size. The proposed algorithm automatically regulates the step size to track the MPP through a step size adjustment coefficient, and a user predefined constant is unnecessary for the convergence of the MPPT method, thus simplifying the design of the PV system. A tuning method of initial step sizes is also presented, which is derived from the approximate linear relationship between the open-circuit voltage and MPP voltage. Compared with the conventional INC method, the proposed method can achieve faster dynamic response and better steady state performance simultaneously under the conditions of extreme irradiance changes. A Matlab/Simulink model and a 5 kW PV system prototype controlled by a digital signal controller (TMS320F28035) were established. Simulations and experimental results further validate the effectiveness of the proposed method. View Full-Text
Keywords: adaptive variable step size; maximum power point tracking (MPPT); photovoltaic (PV) systems; incremental conductance (INC); adjustment coefficient; initial step sizes adaptive variable step size; maximum power point tracking (MPPT); photovoltaic (PV) systems; incremental conductance (INC); adjustment coefficient; initial step sizes
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Li, C.; Chen, Y.; Zhou, D.; Liu, J.; Zeng, J. A High-Performance Adaptive Incremental Conductance MPPT Algorithm for Photovoltaic Systems. Energies 2016, 9, 288.

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