Application of bridge-type FCL for betterment of FRT capability for DFIG-based wind turbine

Impact of traditional structured bridge-type fault current limiter (FCL), which is a auxiliary device and connected with doubly-fed induction generator (DFIG) based wind turbine system is observed in this present work. The traditional bridgetype FCL with discharging resistor is analyzed to improve the fault ride-through capability. A new control scheme has been presented in order to reduce the stator side fault current during a grid fault. The results of the simulation shows that the dynamic performance of the system is improved using the traditional bridge-type FCL. The DFIG wind turbine is associated with the grid and it is considered as an infinite bus. At the point of the interconnection between the wind energy conversion system and the grid, a symmetrical fault is taken. The results of traditional bridge-type FCL are compared with the series dynamic breaking resistor (SDBR) and without auxiliary controller. It is found that traditional bridge-type FCL works better than the SDBR. The entire system simulation is carried out using PSCAD/EMTDC software.