Wind Energy Conversion System using a Squirrel Cage Induction Generator Coupled to the Network with a Predictive DPC

Abstract

This paper presents the modeling of a Wind Energy Conversion System (WECS) using a self-excited induction generator (SEIG) coupled to the grid with a predictive Direct Power Controller (DPC), applying an optimal space vector selection technique. The self-excitation of the induction generator is obtained with a Direct Torque Controller (DTC) which allows controlling the machine's space vector flux and electric torque. On the other hand, the power system coupling is with a Direct Power Controller (DPC), that selects the voltage space vectors required to minimize the active and reactive power errors to the reference. The advantage of the optimum DPC scheme proposed in this work is the fast adjustment of the active and reactive powers to the references, compared with speed obtained using the inverter's PLL synchronization method.