21 Kw Grid connected Pv system in MATLAB 

This project presents a 21 kW grid-connected solar photovoltaic (PV) system modeled and simulated in MATLAB/Simulink. The system integrates a PV array with a DC-DC boost converter and MPPT control, followed by a three-phase voltage source inverter (VSI) synchronized with the grid using dq control and PLL.

The model demonstrates efficient power extraction under constant irradiance conditions and ensures stable DC-link voltage regulation (~700 V). The inverter injects high-quality sinusoidal current into the grid with controlled active power delivery (~11 kW observed per simulation conditions).

It includes complete waveform analysis of PV output, DC-link dynamics, inverter behavior, load response, and grid interaction, making it suitable for detailed performance evaluation and control strategy validation.

🔹 Specifications / Ratings

• PV System Capacity: 21 kW

• PV Voltage Range: ~280–320 V

• PV Current Range: ~70–80 A

• Maximum PV Power: ~21 kW

• DC-DC Converter: Boost Converter

• MPPT Technique: Perturb & Observe (P&O)

• DC Link Voltage: 700 V (regulated)

• Inverter Type: 3-Phase Voltage Source Inverter (VSI)

• Control Strategy: dq-axis current control with PLL synchronization

• Grid Voltage: 415 V (L-L), 50 Hz

• Load Power: ~10–11 kW

• Switching Frequency: Typically 5–20 kHz

• Filter: L filter for harmonic reduction

• Simulation Platform: MATLAB/Simulink

🔹 Key Points

• ✔️ Complete PV → Boost → DC Link → Inverter → Grid architecture

• ✔️ Stable DC-link voltage maintained at 700 V with minimal ripple

• ✔️ Efficient MPPT tracking achieving near 21 kW output

• ✔️ Grid synchronization using PLL + dq control

• ✔️ Low transient settling time (~0.1–0.2 sec)

• ✔️ Clean sinusoidal grid voltage and current waveforms

• ✔️ Real-time analysis of PV, inverter, load, and grid power

• ✔️ Supports active power injection to grid (~11 kW)

• ✔️ Suitable for power quality and control validation studies

• ✔️ Modular design for easy extension (battery, EV, hybrid systems)

🔹 Useful To

• 🔸 Researchers working on grid-connected PV systems

• 🔸 Engineers designing solar inverters and control strategies

• 🔸 Students learning MPPT, dq control, and grid synchronization

• 🔸 Projects involving EV charging stations with solar integration

• 🔸 Studies on power quality, THD, and DC-link stability

• 🔸 Development of hybrid microgrid and energy management systems