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Single stage single phase grid connected PV system

Single stage single phase grid connected PV system

Introduction:

Greetings, viewers! Welcome to the latest tutorial from the LMS Solution. Today, we'll delve into the simulation of a single-stage, single-phase grid-connected solar PV system using MATLAB. This simulation model incorporates a solar PV panel, a DC link capacitor, and an inverter with MPPT (Maximum Power Point Tracking) control logic, enabling it to connect to the main grid.


System Components:

PV Array:

  • The system includes a single PV array with specific characteristics, such as a maximum power point voltage of 31 volts and a maximum power point current of 4.06 amps.

Inverter:

  • A single-phase inverter with an MPPT control logic based on a proportional-integral (PI) controller.

DC Link Capacitor:

  • The DC link capacitor serves to smooth out the DC voltage.

Main Grid:

  • The inverter is connected to the main grid, allowing for bidirectional power flow.

Local Loads:

  • Two local loads are incorporated into the system.

Control Logic:

MPPT Control:

  • The system employs MPPT control to extract maximum power from the PV array based on the array's voltage and current.

Grid Current Controller:

  • The grid current is measured, converted to DQ form, and processed through a PI current controller with feedforward decoupling control.

Inverter Control:

  • The control logic generates reference voltages, and after several processing steps, it leads to the generation of gating pulses for the inverter.

Simulation and Results:

Simulation Parameters:

  • Parameters such as irradiation are set, and the simulation results are observed.

PV Power Output:

  • The simulation demonstrates the power output of the PV array under varying irradiation levels, showcasing its ability to generate power efficiently.

Grid Interaction:

  • Power flow between the grid, local loads, and the PV system is observed, ensuring optimal power distribution.

Inverter Operation:

  • The inverter voltage and current graphs illustrate its seamless operation in converting DC power to AC for grid interaction.

Conclusion:

In conclusion, this MATLAB simulation provides insights into the performance of a single-stage, single-phase grid-connected solar PV system. The use of MPPT control, coupled with a well-designed inverter control logic, ensures efficient power generation and grid interaction.

Final Thoughts:

Experiment with different simulation parameters to understand the system's behavior under various conditions. Subscribe to our channel for more informative tutorials.

Thank you for joining us in exploring the simulation of a grid-connected solar PV system. Subscribe, hit the bell icon, and stay tuned for upcoming videos. Goodbye!

Note: This blog post provides an overview. The actual MATLAB code and detailed simulation steps are recommended for practical implementation.



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