Application of CSC-based SMES to Improve the LVRT Capability of DFIG-based WECS

In order to improve the low voltage ride through (LVRT) capability of the doubly fed induction generator (DFIG) based wind farm, an application of a series-connected current source converter (CSC) based superconducting magnetic energy storage (SMES) device is proposed. The device has the advantages of both simple structure and control method. During the fault, it can quickly control the stator and rotor currents of DFIG to maintain its allowable value, ensuring reliable grid connection of the wind turbine. A DFIG-based wind turbine integrated with the CSC-SMES model is built in MATLAB/ Simulink to validate the feasibility of the proposed scheme.