Geração de energia eólica conectada à rede elétrica a partir de gerador de indução em gaiola de esquilo

Abstract

The present work is an implementation in simulation of an wind energy generation system connected to electric grid, in which a three-phase induction generator with a squirrel cage rotor (SCIG) is applied to wind power systems. The connecting to the mains is accomplished by using an L filter. The SCIG stator terminals are connected to the mains before the filter using an AC/DC/AC power converter topology, called back-to-back, while the rotor terminals are short circuited, so that the SCIG’s active and reactive power control techniques are presented. The control of grid side converter (GSC) is presented, responsible for the power control and also for keeping the DC bus voltage constant. The control of induction generator side converter (IGSC) is presented also, in which vector control is used in rotor variables, so that the SCIG is controlled through the torque references and magnetizing current. The studied system was mathematically modeled and simulated using MatLab/Simulink software to verify its technical viability.