Low voltage ride-through enhancement in DFIG-based wind turbine

Wind farms are regarded as large-scale power plants with interconnected systems, where all systems interact with each other to improve the efficiency of the plant and thus enhance the quality of the output power. However, the conventional centralized controller is inappropriate for such plants. Accordingly, the plant-wise controller is an alternative solution to be plant-wise decentralized, by designing the separate local controller of each subsystem. Moreover, voltage stability plays a significant role to preserve the Doubly Fed Induction Generator (DFIG) based Wind Farms (WF) connected to the grid, which is known as Low- Voltage-Ride-Through (LVRT), in the period of fault appearance. This paper describes a critical review on the existing control methods of the LVRT enhancement in DFIG-based WTs, and also presents the significance of the LVRT capacity improvement to enhance the power quality and guarantee the plant-wise stability during the grid faults