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

Chendi Li, Yuanrui Chen, Dongbao Zhou, Junfeng Liu and Jun Zeng
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Chendi Li: School of Electric Power, South China University of Technology, Guangzhou 510640, China
Yuanrui Chen: School of Electric Power, South China University of Technology, Guangzhou 510640, China
Dongbao Zhou: School of Electric Power, South China University of Technology, Guangzhou 510640, China
Junfeng Liu: School of Automation Science and Engineering, South China University of Technology, Guangzhou 510640, China
Jun Zeng: School of Electric Power, South China University of Technology, Guangzhou 510640, China

Energies, 2016, vol. 9, issue 4, 1-17

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.

Keywords: adaptive variable step size; maximum power point tracking (MPPT); photovoltaic (PV) systems; incremental conductance (INC); adjustment coefficient; initial step sizes (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (16)

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