Control-Oriented Model of Photovoltaic Systems Based on a Dual Active Bridge Converter

Solar energy is a source of sustainable energy and its optimal use depends on the efficiency and reliability of PV systems. Dual active bridge converters are a solution to interface PV modules with the grid or high voltage requirement applications due to the high voltage-conversion-ratio and high ef...

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Bibliographic Details
Published in:Sustainability 2021-07, Vol.13 (14), p.7689
Main Authors: Herrera-Jaramillo, Diego Alejandro, Henao-Bravo, Elkin Edilberto, González Montoya, Daniel, Ramos-Paja, Carlos Andrés, Saavedra-Montes, Andrés Julián
Format: Article
Language:English
Subjects:
Alternative energy sources
Bridges
Control systems
Control systems design
Controllers
Differential equations
Efficiency
Electric bridges
Electric converters
Energy conversion efficiency
Fourier analysis
High voltage
High voltages
Mathematical models
Maximum power
Nonlinear control
Photovoltaic cells
Photovoltaics
Simulation
Solar energy
Solar energy conversion
Sustainability
Voltage
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Summary:Solar energy is a source of sustainable energy and its optimal use depends on the efficiency and reliability of PV systems. Dual active bridge converters are a solution to interface PV modules with the grid or high voltage requirement applications due to the high voltage-conversion-ratio and high efficiency provided by such a converter. The three main contributions of this work are: an extensive mathematical model of a DAB converter connected to a PV module including protection diodes, which is intended to design non-linear controllers, an explicit linearized version of the model, which is oriented to design traditional control systems; and a detailed and replicable application example of the model focused on maximizing the power extraction from a PV system. The modeling approach starts with the differential equations of the PV system; however, only the fundamental and average components of each signal is used to represent it. The control-oriented model is validated using a detailed circuital simulation. First, through the comparison of frequency and time diagrams of the proposed model and a detailed one; and then, through the simulation of the PV system in a realistic application case. PV voltage regulation and maximum power extraction are confirmed in simulation results.
ISSN:2071-1050
2071-1050
DOI:10.3390/su13147689