DFIG wind turbine three single phase grid side converters strategy control

In this paper, an effective doubly fed induction generators´ grid side converter control strategy is proposed. This scheme helps in limiting the fault currents as well as in voltage unbalance compensation. In the considered topology three single-phase converters is used instead of one three-phase converters. Voltage is injected in series with the transmission line to limit the fault currents as well as to balance the voltages. The advantages of the proposed controller method with previous one are in inverter size reduction, controllability and feasibility. This scheme allows wind turbines to remain synchronized to the grid during faults or during voltage sags and swings. The effectiveness of the proposed control strategy is confirmed with simulation results in MATLAB/SIMULINK environment.