http://hdl.handle.net/2117/3812 2013-05-22T22:26:05Z http://hdl.handle.net/2117/13504 Title: Wind turbine generation systems modeling for integration in power systems Authors: Junyent Ferré, Adrià; Gomis Bellmunt, Oriol Abstract: This chapter deals with the modeling of wind turbine generation systems for integration in power systems studies. The modeling of the wind phenomenon, the turbine mechanical system and the electrical machine, along with the corresponding converter and electrical grid is described. 2011-10-14T08:48:30Z http://hdl.handle.net/2117/13453 Title: Control of doubly fed induction generators under balanced and unbalanced voltage conditions Authors: Gomis Bellmunt, Oriol; Junyent Ferré, Adrià Abstract: The present chapter presents a control technique to deal with the control of doubly fed induction generators under different voltage disturbances. Certain current reference values are chosen in the positive and negative sequences so that the torque and theDCvoltage are kept stable during balanced and unbalanced conditions. Both rotor-side and grid-side converters are considered, detailing the control scheme of each converter while considering the effect of the crow-bar protection. The control strategy is validated by means of simulations. 2011-10-07T10:41:31Z