Controle de velocidade de um motor de indução trifásico para emulação de uma turbina eólica

Abstract

Among the renewable energies, wind energy has had a worldwide presence due to the increasing application in the conversion into electric energy. Due to the stochastic nature of the wind, the eolic-electric generation became the object of study regarding the impacts of a variable output power generation in the power grid. In addition, other factors, which influence power control, are also analyzed, in particular the generator and wind turbine technology and associated static converters. This work aims to model and simulate a wind turbine emulator using a squirrel-cage rotor three-phase induction motor (TIM) running at variable speed. To control the speed of the TIM, a vector control technique of direct oriented field control (DFOC) type is used. A voltage-current model type flux observer was developed with a controller to switch between voltage and current models according to the operating conditions. The validation of the complete system was done by simulation in the simulator MATLAB / Simulink, using different characteristics of wind speed, using, also, actual data of wind speed in one of the simulations. The simulation results showed that the current, flux and speed implemented controls responded satisfactorily to the wind velocities, observing a ready follow-up of reference speeds.