Line Integration of Bidirectional Inverter with Buck Boost for Microgrid

Line-interactive uninterruptible power supply (UPS) systems are good candidates for providing energy storage within a micro-grid. Power can be imported from the grid by the UPS to charge its battery in grid-connected mode. The UPS supplies local distributed loads in parallel with other sources in stand-alone mode. In this paper, Power flow is controlled using the frequency and voltage drooping technique. It improves the reliability, economy and efficiency.