Maximum power point tracking in PV systems based on adaptive control and sliding mode control/Seguimiento del máximo punto de potencia en sistemas fotovoltaicos basado en control adaptativo y un control en modos deslizantes

Photovoltaic (PV) systems are commonly controlled using PI or PID structures, which cannot ensure global stability and a constant settling time. Therefore, the optimization algorithms, e.g. Perturb and Observe (P&O), are designed using the highest settling time in the operating range, which prod...

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Bibliographic Details
Published in:Revista Facultad de Ingeniería 2015-06 (75), p.67-67
Main Authors: Ortiz-Valencia, Paula Andrea, Trejos-Grisales, Luz Adriana, Ramos-Paja, Carlos Andrés
Format: Article
Language:eng ; spa
Subjects:
Algorithms
Constants
Control systems
Controllers
Dynamical systems
Guarantees
Maximum power
Photovoltaic cells
Settling
Solar cells
Solar energy
Stability
Systems stability
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Summary:Photovoltaic (PV) systems are commonly controlled using PI or PID structures, which cannot ensure global stability and a constant settling time. Therefore, the optimization algorithms, e.g. Perturb and Observe (P&O), are designed using the highest settling time in the operating range, which produces a slow tracking of the maximum power point (MPP) for the largest part of the operation range, introducing dynamic power losses to the system. This paper proposes to combine an adaptive controller and a sliding mode current controller (SMCC) to guarantee global stability and a constant settling time for any operation condition, which enable to increase the generated power in comparison with PI and PID controllers. The SMCC enables to mitigate the system perturbations and guarantee global stability, while the adaptive controller defines the reference of the SMCC to ensure a constant settling time. The design of the new control structure is supported by mathematical analyses and simulations made in Matlab®, where the robustness of the system is validated.
ISSN:0120-6230
2422-2844