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