Implementation of Battery-Integrated Transformerless High-Gain Smart Inverter

This study presents a novel battery-integrated, transformerless high-gain smart inverter model designed to enhance the efficiency and reliability of photovoltaic (PV) energy systems. The proposed system integrates an interleaved buck converter for battery charging and a transformerless high-gain DC-DC converter operating in parallel with the battery to supply the inverter source. Additionally, a two-level inverter is employed to ensure stable grid voltage generation. The model incorporates several required control strategies, including Maximum Power Point Tracking (MPPT) for optimal solar energy utilization, active and reactive power control for grid-connected operation, and voltage regulation for off-grid scenarios. The bidirectional energy flow capability enables seamless power distribution between the PV array, battery storage, and the electrical grid, ensuring enhanced system performance. Simulation results validate the efficiency and stability of the proposed inverter model, demonstrating improved power conversion, reduced energy losses, and enhanced system flexibility. By eliminating the need for a transformer, the design achieves higher efficiency and lower cost while maintaining operational reliability. This research contributes to the development of more sustainable and intelligent PV energy solutions, paving the way for improved energy management in renewable power systems.