Seamless Transition of Grid Connected Photo-voltaic System using Grid Forming and Grid Following Converters

As the world grapples with the challenges of climate change, energy security, and reliability, the integration of solar photovoltaic (PV) technology with the grid has become a critical component of a sustainable and decentralized energy future. Solar energy's intermittent and variable nature necessitates advanced integration strategies to ensure a stable, efficient, and reliable power supply. This paper addresses this need by presenting a novel grid-connected solar PV system with seamless synchronization and power supply capabilities. This innovative system integrates solar PV with the grid through a 4-quadrant interface, prioritizing synchronization and reliable supply. Two parallel converters work in tandem: a grid-forming converter adapts to grid connectivity, ensuring stability, while a grid-following converter follows the grid-forming converter's voltage, ensuring efficiency. The control algorithm guarantees uninterrupted power to critical loads during grid disruptions and achieves rapid synchronization upon grid recovery. Performance is thoroughly evaluated using Simulink simulations in a range of scenarios, including as linear and nonlinear loads, grid disruptions, and varying insolation levels. The control algorithm and system topology are carefully planned and executed. This integrated system ensures a reliable, efficient, and sustainable power supply, significantly enhancing grid resilience and solar PV grid integration.