Control of Power Flow Between the Wind Generator and Network

Among the renewable energies, wind energy is hosted in selected points helping their penetration to the network. This paper shortly treats the wind power flow and the control of power flow within the wind power plant, focusing on the doubly fed induction generator (DFIG). A general slip-torque relation is derived with three torque components: one component is derived by the stator voltage, the other component by the d component, and the third component by the q component of the rotor voltage space vector. The algorithm for controlling the stator active and reactive power by the rotor-side converter in block diagram form is developed, and its operation is presented by simulation results. The reader can easily check all results as the relations are derived and their physical contents are explained.