Modeling and control of a grid-connected photovoltaic system
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Date
2023-09-20
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Journal ISSN
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Publisher
University of M'sila
Abstract
The work presented in this thesis focuses on the modeling and control of a grid-connected photovoltaic
system. This system is expected to undergo significant developments mainly driven by a growing
commitment to diversify the means of electrical energy production and transition towards renewable
energy sources. To simplify the understanding of this work, this thesis has been presented in three
chapters. The second chapter was devoted to the control of converters in a grid-connected photovoltaic
system. An overview of the grid-connected PV system was provided. The definition of the DC-DC
converter was discussed, and different types of DC-DC converters were explored. The principle and
modeling of the boost converter were presented, and the definition and classification of the inverter
were described. The three-phase inverter was examined, and the modeling of the inverter and the
principle of pulse width modulation (PWM) were discussed, along with various methods and techniques
of maximum power point tracking (MPPT). The focus was on the perturb and observe algorithm. The
chapter concluded by discussing the control of the inverter using voltage source inverter (VSI) and
phase-locked loop (PLL) control. At the end of this work, the grid-connected photovoltaic system was
simulated and controlled using the PSIM software platform. Each part of the system was individually
simulated, and the obtained results were discussed. Subsequently, the entire system was simulated to
assess its overall performance. The results obtained from the simulations confirmed the effectiveness of
the proposed grid-connected PV system in successfully injecting the maximum extracted power into the
main grid.