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Article

Augmented Nonlinear Controller for Maximum Power-Point Tracking with Artificial Neural Network in Grid-Connected Photovoltaic Systems

by *,†, *,†, , and
School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Senthilarasu Sundaram
Energies 2016, 9(12), 1005; https://doi.org/10.3390/en9121005
Received: 20 October 2016 / Revised: 21 November 2016 / Accepted: 24 November 2016 / Published: 30 November 2016
Photovoltaic (PV) systems have non-linear characteristics that generate maximum power at one particular operating point. Environmental factors such as irradiance and temperature variations greatly affect the maximum power point (MPP). Diverse offline and online techniques have been introduced for tracking the MPP. Here, to track the MPP, an augmented-state feedback linearized (AFL) non-linear controller combined with an artificial neural network (ANN) is proposed. This approach linearizes the non-linear characteristics in PV systems and DC/DC converters, for tracking and optimizing the PV system operation. It also reduces the dependency of the designed controller on linearized models, to provide global stability. A complete model of the PV system is simulated. The existing maximum power-point tracking (MPPT) and DC/DC boost-converter controller techniques are compared with the proposed ANN method. Two case studies, which simulate realistic circumstances, are presented to demonstrate the effectiveness and superiority of the proposed method. The AFL with ANN controller can provide good dynamic operation, faster convergence speed, and fewer operating-point oscillations around the MPP. It also tracks the global maxima under different conditions, especially irradiance-mutating situations, more effectively than the conventional methods. Detailed mathematical models and a control approach for a three-phase grid-connected intelligent hybrid system are proposed using MATLAB/Simulink. View Full-Text
Keywords: photovoltaic (PV) systems; DC/DC converter; maximum power-point tracking (MPPT); artificial neural network (ANN); non-linear controller; augmentation system photovoltaic (PV) systems; DC/DC converter; maximum power-point tracking (MPPT); artificial neural network (ANN); non-linear controller; augmentation system
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MDPI and ACS Style

Ma, S.; Chen, M.; Wu, J.; Huo, W.; Huang, L. Augmented Nonlinear Controller for Maximum Power-Point Tracking with Artificial Neural Network in Grid-Connected Photovoltaic Systems. Energies 2016, 9, 1005. https://doi.org/10.3390/en9121005

AMA Style

Ma S, Chen M, Wu J, Huo W, Huang L. Augmented Nonlinear Controller for Maximum Power-Point Tracking with Artificial Neural Network in Grid-Connected Photovoltaic Systems. Energies. 2016; 9(12):1005. https://doi.org/10.3390/en9121005

Chicago/Turabian Style

Ma, Suliang, Mingxuan Chen, Jianwen Wu, Wenlei Huo, and Lian Huang. 2016. "Augmented Nonlinear Controller for Maximum Power-Point Tracking with Artificial Neural Network in Grid-Connected Photovoltaic Systems" Energies 9, no. 12: 1005. https://doi.org/10.3390/en9121005

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