Solar PV System with Open-Loop Boost Converter and Inverter

Model of a Solar PV system driving an open-loop boost converter and SPWM inverter to supply AC power with stable waveforms and simple design

This Simulink model presents a complete Solar PV–based DC to AC power conversion system built with simple, transparent, and easy-to-understand blocks. The system begins with a photovoltaic array configured to deliver a realistic DC output voltage, which is then processed by an open-loop DC–DC boost converter. The boost converter raises the PV voltage to a stable DC-link level suitable for feeding a single-phase full-bridge inverter.

The inverter uses sinusoidal PWM (SPWM) switching to generate a clean AC output waveform, making this model ideal for studying the fundamental operation of DC–AC conversion. The design avoids closed-loop and MPPT complexity, allowing users to focus purely on the core concepts of PV interfacing, boost conversion, and inverter switching.

Key features included in this model:

• Solar PV array producing ~200 V under standard conditions

• Open-loop boost converter with fixed duty cycle operation

• DC-link capacitor for smoothing and stabilizing converter output

• Single-phase full-bridge SPWM inverter

• AC load for observing real output behavior

• Well-organized scopes showing PV voltage, boost output, DC-link voltage, inverter AC waveform, and load current

• Fully editable structure suitable for analysis, experimentation, and extension

This model is designed to provide a clean and efficient simulation framework for solar-powered DC–AC conversion. The layout is straightforward, allowing users to quickly understand signal flow, inspect individual stages, and modify parameters as needed.

The system architecture is intentionally kept modular so it can be expanded easily for example by adding MPPT, dynamic load behavior, closed-loop boost control, or grid-tied inverter concepts. The model serves as a solid base for further development or integration into larger renewable energy simulations.