Type-C wind power generator modeling

This paper presents the dynamic and steady-state models of a generic Type-C wind power generator (WPG). These models are useful for power system analysis. This type of WPG is based on a doubly-fed induction machine. By assuming that stator flux-linkages are dynamically much faster than the rest of state variables' dynamics, the so-called two-axis model is presented. A single mass model is considered. Based on PI-controllers, active and reactive power controllers are presented. The active power controller is designed to maximize the power extraction from the wind and the reactive power controller is designed to follow a reference. In addition, by assuming that the mechanical torque and rotor voltages are known variables provided by the turbine and controllers, respectively, the steady-state model of the doubly-fed induction generator is derived. Finally, a general procedure to calculate initial conditions for time domain simulations as well as a brief discussion about active power controller and power losses is presented.