Step-by-Step Implementation of P&O MPPT in MATLAB
Setting Up the Model
Open Simulink: Start by creating a new model in Simulink.
Components: Include a solar PV array and a boost converter in your model.
Configuration: Set fixed values for irradiation (1000 W/m²) and temperature (20°C).
Designing the PV Array
Panel Ratings: For a target output of 3 megawatts, select appropriate solar panels (e.g., SunPower panels).
Calculations: Calculate voltage and current requirements based on the number of series and parallel connections needed.
Output Verification: Ensure the PV array can achieve the desired power output.
Boost Converter Design
Calculate Inductor and Capacitor Values: Use specific formulas to determine the required inductor (L) and capacitor (C) values for the boost converter based on the expected output.
Circuit Setup: Create an RLC circuit, and add components like switches and diodes to the Simulink model.
Implementing P&O MPPT Control
Measurement Blocks: Use measurement blocks to capture the voltage and current from the PV array and load.
Change Detection: Implement logic to detect changes in power, voltage, and adjust the reference voltage accordingly.
Control Logic: Use switches to control the reference voltage based on the power and voltage changes, applying increment and decrement logic as needed.
Tuning and Simulation
Simulate the Model: Run simulations to observe the system’s response and check for oscillations in the output.
Auto-tuning Parameters: Adjust the PI controller parameters to improve system stability and maximize power extraction.
Final Adjustments: Conduct final tuning to achieve a balance between response time and stability.
Conclusion
Results: The process illustrates how to effectively implement P&O MPPT for solar PV systems using MATLAB.
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