Study and simulation of Grid-Side Converter Control for Grid-Connected DFIG Wind Turbines

Abstract

The main purpose of the work carried out is to analyse a different wind turbine technology integrated into an electrical network, this system behaves a turbine, a generator, rectifier and inventor power converters, these are connected on both sides to the DC bus. The dissertation describes the control and design of a Doubly Fed Induction Generator (DFIG) using back-to-back PWM. This latter is used as the excitation power supply for the DFIG wind power generation, in order to control the stator active and reactive power, a method called direct vector control is based on the transformation of the electrical variables of the machine into a reference that rotates with the flow vector is employed. While the grid side converter is used to regulate the voltage of the DC link capacitor, besides it satisfies the unity power factor of grid-side and bi-direction flowing ability of energy. The control model of whole system is built using MATLAB/Simulink program and the simulation results are discussed by the following.