Improving transient stability of double fed induction generator using fuzzy controller

SUMMARY With increasing penetration of wind turbine in power systems and micro grids, it is inevitable to investigate effects of wind turbines on micro‐grid performance. This paper investigates the impact of doubly fed induction generator (DFIG) on transient stability of the micro‐grid. In the first step; simulation results show that the more penetration of DFIG in a micro‐grid, the less critical clearing time (CCT). In the second step, in order to improve the transient stability of the DFIG, a Fuzzy controller is introduced and added to the conventional proportional and integral (PI) controller of rotor side of the DFIG, which increases the CCT. In proposed algorithm, the speed and acceleration of the rotor are used as the inputs of the fuzzy PI controller. Numerical simulations on a typical micro‐grid shows the benefits of the proposed controller. Copyright © 2013 John Wiley & Sons, Ltd.