Modeling And Control Of A Grid-connected Photovoltaic System

Résumé: 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.

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