The study of ruduced-order model of the direct-drive permanent magnet genetrator

In this paper, a model of the wind turbine (WT) with direct-drive permanent magnet generator (DDPMG) and its associated controllers is presented, based on which the small signal stability analysis model is derived. As detailed models of wind farm can place and unbearable computational burden on simulations programs, there is a need to reduce wind farm order dimension. Focusing on the most relevant modes and variables, the model order is reduced using the small signal analysis. To evaluate the result, simulations are performed on a single machine infinite bus system. A general formulation for applying the small signal is shown and a reduction model example is presented: which with three relevant modes. The proposed reduced-order model reduces the simulation time and the power system model complexity.