Seamless Grid-Connection Technology for Emergency Power Supply Based on Dual-Winding Induction Generator and Energy Storage Hybrid System

The seamless transition between island mode and grid-connected mode is a significant challenge faced by current emergency power supply. This paper proposes an emergency power solution based on a dual-winding induction generator and an energy storage system. The scheme achieves seamless gridconnection by adjusting the voltage phase of the emergency power supply to align with the grid phase, thereby effectively reducing the impact during the grid connection process and ensuring stable power supply. The paper introduces the basic architecture of the system and provides a detailed explanation of the phase adjustment mechanism during the grid connection process. A simulation model is then established, and the simulation results validate the effectiveness of the proposed scheme in achieving a smooth transition during grid connection.