Novel control method of grid connected converter of doubly fed induction generator to achieve disturbances rejection

The number of doubly fed induction generators (DFIGs) has been grown in recent years because of its merits. They play an important part of the total amount of wind generation. On the other hand due to proliferation of utilizing non-linear loads in power system, power quality problems like harmonics, voltage sag/swell, etc outbreak. These problems have destructive effect of performance of DFIG. To address this problem, in this paper a new control is proposed for DFIG to enhance its performance under disturbed condition. In this control system grid side converter behaves like a shunt active filter with voltage detection control which regulates system voltage. Since the VA capacity of GSC is limited, its tasks prioritize according to system conditions. With proposed control system not only DFIG is capable of capturing maximum energy from wind with better performances compared to conventional controls, but also it contributes to damping out the harmonic amplification throughout the distribution line.