Analyzing the dynamic behavior of a DFIG-based wind farm under sudden grid disturbances

It is well established that wind energy is a potential source for generation of electricity with minimal environmental impacts and also it is the fastest emerging renewable source for power generation apart from solar PV systems. Doubly-Fed Induction Generator (DFIG) based wind farms are becoming very attractive and economical choice for the power utilities as they are capable to operate with wide varying range of wind speed. However, due to the intermittent nature, wind power generators are not as controllable as other generators, so when their grid penetration increases, it may led to some stability and controllability issues. Moreover, the utility grid is prone to frequent disturbances e.g. unsymmetrical faults, grid voltage dip or sag & voltage swell etc. So, analyzing the dynamic behavior of large DFIG based wind farms under different operating conditions, is required in order to integrate them into the utility grid. Here, in this work, the different impacts of sudden grid disturbances on a MW-level grid-connected large DFIG based wind farm are analyzed in detail using MATLAB/Simulink.