Independent Control of Active and Reactive Powers of a DFIG Based Wind Energy Conversion System by Vector Control

The paper deals with a design and implementation of a doubly fed induction generator (DFIG) wind energy\ud conversion system (WECS) connected to the power grid. A back-to-back AC/DC/AC converter is incorporated\ud between the stator and the rotor windings of a DFIG, in order to obtain variable speed operation. The DFIG can\ud be controlled from sub-synchronous speed to super synchronous speed operation. The main objective of the\ud paper is to control the flow of the Active and Reactive powers produced by the DFIG based wind energy\ud conversion system. A vector control strategy with stator flux orientation is applied to both the grid side\ud converter and the rotor side converter for the independent control of Active and reactive powers produced by the\ud DFIG based wind energy conversion system. The system along with its control circuit were simulated in a\ud Matlab/simulink and the results are presented and discussed