A coordinated control strategy using rotor current limiter and switchable type series passive resistive fault current limiter for enhanced fault ride-through

摘要

Doubly fed induction generator (DFIG) is widely used wind generator in recent years. However, DFIGis most prone to the fault. The consequences of the fault are rotor current, stator current and dc link over voltage. These are the predominant causes of destruction of the generator and converter, which forces the disconnection of generator from the grid. However modern grid code does not allow the disconnection. So protection system is most predominant requirement for effective continuity operation. This paper proposed an enhanced strategy for handling the fault consequences. For revealing the effectiveness the results obtained using proposed scheme are compared with the rotor current limiter. The simulation is carried out in MATLABSIMULINK environment.