A PMSG Wind Energy System Featuring Low-Voltage Ride-through via Mode-Shift Control

Low-voltage ride-through (LVRT) and grid support capability are becoming a necessity for grid-tied renewable energy sources to guarantee utility availability, quality reliability. In this paper, swap control scheme is proposed permanent magnet synchronous generator (PMSG) MW-level wind turbines. This shifts system operation from maximum power point tracking (MPPT) mode LVRT mode, during voltage sags. the rectifier-boost machine-side converter overtakes DC-link regulation independently of grid-side converter. The latter attains synchronization by controlling active injection into agree with current limits while supporting reactive according sag depth. Thus code requirements met converters safety guaranteed. Moreover, approach uses turbine-generator rotor inertia store surplus dips; thus, there no need extra hardware storage devices. solution applied on topology featuring minimal number switches, compared popular back-to-back topology. adds compatibility, reducing its size, cost switching losses. Simulation experimental results presented validate normal operation.