Entire wind-to-power representation of a wind turbine unit in electrical power system studies

In studying the impact and interaction of wind power systems connected to an electrical network, often a detailed electrical model is used, completed with a simplified turbine representation to provide the input torque. On the other hand, in studies on the mechanical loading of the wind turbine system, the electrical power components are represented in limited manner, in fact ignoring interactions due to dynamic phenomena in the grid. To be able to perform truly dynamic studies, an entire wind-to-power representation is required for a wind turbine system. In this paper, a dynamical model of a wind turbine (WT model) extended with a fourth-order state-space model of an induction generator is compared with a measurements on a 600 kW wind turbine. In a second part of this paper, the entire wind-to-power transfer function is simplified to a first or second-order transfer function.