Single DC-Source Boosted Ouput MLI Inverter Topology for Solar PV Grid Integration

This article presents an improved 13-level Switched-Capacitor Multilevel inverter (SC-MLI) topology integrated with a solar PV system. The circuit utilizes 11 unidirectional switches, one bidirectional, a single DC source, and three capacitors to achieve a triple-boosted output voltage while reducing the total standing voltage (TSV). The capacitor voltages are self-balanced, eliminating the need for auxiliary circuits or sensors, thereby simplifying the design and makes it more suitable for solar PV integration. The feasibility of the topology is tested under dynamic and statics load conditions, ensuring its adaptability to real time applications. A comparative analysis is conducted to evaluate the circuit’s switch count, cost, power quality and stresses on the switches during operation. Thermal analysis using PLECS software is carried out to evaluate component losses, heat dissipation, and efficiency, ensuring optimal performance and reliability of the system. The circuit is integrated with PV system, and a PSO-based MPPT controller is used to ensure maximum power operation. The feasibility of implementation for solar PV applications is validated through testing, confirming the topology’s effectiveness and suitability for practical use in PV systems.