Controle direto de potência em gerador de indução duplamente alimentado

Abstract

With the increase of wind turbine generation systems in Brazil and worldwide, the network codes and standards have gained prominence, focusing on the integration with the network, and the quality of the energy supplied. The doublyfed induction generator (DFIG) is the most commercialized machine topology in the world, and therefore, is the technology employed in this work. This thesis presents the analysis of a different control method of the system. The direct power control (DPC) is a relatively new method in the DFIG, and still has a limited number of researches. The DPC is explained and a comparative analysis regarding the Field Oriented Control (FOC) is performed, to evaluate the benefits and problems with this control. The study is done on a simulation environment, using the Matlab/Simulink, and presents models of both generator and wind turbine. Results are obtained from the analysis of system parameters, such as generated power and power factor of the system. Studies of the harmonic spectrum resulting from the machine and its supportability to momentary voltage sags (AMT) are also carried out. The behaviors of the variables are compared to the current standards. The system analysis using DPC provides a more thorough evaluation of this control method, emphasizing the points that need further research.