MATLAB Simulation of Dual Buck Boost-Based PV Grid System
The simulation model aims to replicate the bunk and boost the connected PV inverter system as proposed in the referenced paper. This system offers advantages in managing mismatched environmental conditions, ensuring efficient energy conversion and utilization.
System Architecture:
The simulated system comprises several key components, including PV panels, a dual bunk and boost converter, an inverter, and a grid connection. The bunk and boost converter serves as an interface between the PV panels and the inverter, facilitating optimal power transfer and control.
Control Logic:
The control logic implemented in the simulation model follows the principles outlined in the referenced paper. It utilizes a maximum power point tracking (MPPT) algorithm to maximize power extraction from the PV panels. The generated power reference is then processed through a proportional-integral (PI) controller to generate control signals for the bunk and boost converter.
Bunk and Boost Operation:
The bunk and boost converter operates in either bunk or boost mode based on the voltage conditions. When the PV panel voltage is greater than or equal to the converter input voltage (VCU), it operates in bunk mode. Conversely, when the PV panel voltage is less than VCU, it switches to boost mode. The control logic ensures seamless transition between these modes to optimize power conversion.
Inverter Control:
The inverter is controlled based on the output of the bunk and boost converter. Pulse-width modulation (PWM) signals generated by the control logic dictate the inverter operation, ensuring efficient conversion of DC power to AC power for grid connection.
Simulation Results:
The simulation results showcase the system's performance under varying environmental conditions. Graphs depicting PV power, grid current, and grid voltage demonstrate the system's ability to adapt to changing irradiation levels and maintain stable grid connection.
Conclusion:
The simulation model provides valuable insights into the operation and control of bunk and boost connected PV inverter systems. By accurately replicating the system dynamics and control logic, researchers and practitioners can explore the feasibility and performance of such systems under different scenarios. This model serves as a useful tool for advancing research in renewable energy integration and grid-connected PV systems.