A technical approach for managing a novel DFIG-based wind farm architecture under grid-side converter faults

This paper presents a novel wind farm (WF) configuration featuring three wind turbines (WTs), each equipped with a doubly fed induction generator (DFIG), an individual rotor-side converter (RSC), and a shared battery energy storage system (BESS). The stators of the WTs are directly connected to the grid, while their rotor circuits are linked to a common grid-side converter (GSC) via a DC link. An auxiliary power converter structure, consisting of a three-phase rectifier and a boost converter, ensures the connection of rotor windings to the grid during GSC faults, thereby maintaining continuous operation. A new power management and supervision strategy has been developed to optimize energy flow and enhance system performance. The proposed approach has been evaluated under various operating conditions, including normal and fault scenarios, using metrics such as system stability, power quality, fault ride-through capability, and operational continuity. Simulation results demonstrate that the strategy enables seamless control transitions, improves reliability, and enhances the resilience of the wind energy conversion system (WECS), ensuring stable operation even during transient events.