MODELADO Y CONTROL DE GENERADOR DE INDUCCIÓN DOBLEMENTE ALIMENTADO DE UNA TURBINA EÓLICA

Abstract

Nowadays, technology for management of wind energy is developing rapidly. Over the last few years variable speed wind turbines have overwhelmed their respective fixed-speed, mainly due to the improved performance they offer. The variable speed doubly-fed induction generator (DFIG) is one of the most frequently used in modern grid connected wind turbines, because it has the ability to fulfill the grid requirements. DFIG allows a precise control of frequency range, voltage and power generated. For this purpose, this paper will focus on the analysis, modeling and control of the operation of a DFIG moved by a wind turbine and connected to the electricity grid. A nonlinear mathematical model of DFIG and its equivalent simplified model are described for simulation. It is also designed a rotor vector control and a control for the energy fed to the grid. A 2MW wind turbine is analyzed and simulated through Matlab/Simulink. Different reference frames will be used during the modeling and a suitable power control method over the machine operation will be introduced. Furthermore, it stresses the importance of vector control based on stator flux oriented technique in order to manage the active and reactive power effectively.