Dissertação
Emulação dos regimes permanente e transitório das turbinas de eixo horizontal incluindo o modelo estático da turbina Magnus
Fecha
2014-01-24Registro en:
CORRÊA, Leonardo Candido. Emulation of the static and dynamic characteristics of horizontal axis wind turbines including the steady-state representation of a Magnus turbine. 2014. 105 f. Dissertação (Mestrado em Engenharia Elétrica) - Universidade Federal de Santa Maria, Santa Maria, 2014.
Autor
Corrêa, Leonardo Candido
Institución
Resumen
The lodgment of wind sites is in a visible growing demand not only in Brazil, but all over the
world. The wind energy, even though consolidated, still hosts many scientific researches and
industrial development in several areas such as control, power converter topologies and
stability of grid connected wind turbines (WT). Due to the remarkable development of this
technology in the market and the wind seasonality characteristics, it is difficult to study this
power source in its operation field. Thus, a controlled environment for testing is desirable.
This dissertation presents a topology of horizontal axis wind turbines (HAWT) emulator using
a DC motor to provide an electrical generator the same torque that it would if it was driven by
a typical WT. In addition to the static model, represented by the pitch angle and power
coefficient, a dynamic model of HAWT is proposed in order to improve the representation of
real turbines in the field, which allows characterizing the effect of wind shear, towering
shadowing and turbine yaw. Furthermore, it permits emulating large inertia machines through
smaller engines, by changing the torque imposed on the generator. The appealing motivation
in this thesis is that the Magnus turbine emulation includes a relative new type of wind
machine that possesses rotating cylinders instead of the traditional propeller blades in
traditional HAWT. It is shown how these cylinders increase the available torque, then
producing useful power even at lower wind speeds. Simulated and experimental results to
evaluate the performance of the wind turbine emulator are presented. Both turbines are
analyzed with and without MPPT. Finally the conclusions of this work are presented as well
as new proposals for future works.