Wind, the source of energy of wind turbines (WT), does not remain constant, which makes necessary the regulation of the WT rotational speed in order to achieve the maximum efficiency in the wind energy usagee. In doubly -fed induction generator (DFIG) based WT, a speed control loop is conventionally implemented in order to achieve an optimal active power generation.


In this work, the conventional speed control loop is extended further to effectively avoid flicker emission in the Point of Common Coupling (PCC), all the while increasing voltage and frequency stability when operating from weak grids.