MATLAB Simulation of DC Microgrid with PV Battery & Supercapacitor | DC Microgrid

MATLAB Simulation of DC Microgrid with PV Battery & Supercapacitor | DC Microgrid

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🔋 System Overview

The DC microgrid consists of:

✔ 10W Solar PV Panel
✔ Boost Converter with Incremental Conductance MPPT
✔ Lithium-Ion Battery (Series connected cells)
✔ Supercapacitor (58F, 16V)
✔ Bidirectional DC-DC Converters
✔ 4W DC Load
✔ DC Bus Voltage Regulation at 24V

The control strategy ensures:

Maximum power extraction from PV

Stable DC bus voltage regulation (24V)

Intelligent power sharing between battery and supercapacitor

Smooth transient handling during irradiation changes

☀️ Irradiation Profile Used in Simulation

Irradiation is varied every 2 seconds:

1000 → 800 → 500 → 300 → 100 → 300 → 500 → 800 W/m²

This helps demonstrate:

MPPT tracking performance

Battery charge/discharge behavior

Supercapacitor transient response

DC bus voltage stability

⚙️ Control Techniques Used

🔹 Incremental Conductance MPPT for PV
🔹 Voltage Control Loop (DC Bus Regulation)
🔹 Current Control Loop for Energy Storage
🔹 Supercapacitor Transient Support Logic
🔹 PWM Pulse Generation

📊 Performance Observed

DC Bus voltage maintained at 24V

Load power maintained at 4W

Smooth transition during irradiation change

Supercapacitor handles fast transients

Battery handles medium-term energy balancing

Effective MPPT tracking under dynamic conditions

🎓 What You Will Learn

DC microgrid architecture

Boost converter design basics

Bidirectional converter control

Battery & supercapacitor coordination

Incremental Conductance MPPT working

Power balancing strategy in DC microgrids

SOC variation analysis

👨‍🏫 Ideal For

✔ Power Electronics Students
✔ Microgrid Researchers
✔ Renewable Energy Engineers
✔ MATLAB/Simulink Users
✔ EV Charging System Designers
✔ DC Nanogrid Researchers
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