Emulação dos regimes permanente e transitório das turbinas de eixo horizontal incluindo o modelo estático da turbina Magnus
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 connec...
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| Format: | master thesis |
| Status: | Published version |
| Publication Date: | 2014 |
| Country: | Brasil |
| Institution: | Universidade Federal de Santa Maria (UFSM) |
| Repository: | Manancial - Repositório Digital da UFSM |
| Language: | Portuguese |
| OAI Identifier: | oai:repositorio.ufsm.br:1/8552 |
| Online Access: | http://repositorio.ufsm.br/handle/1/8552 |
| Access Level: | Open access |
| Keyword: | Emulador de turbinas eólicas Modelo estático Modelo dinâmico Turbina Magnus Wind turbine emulator Static model Dynamic model Magnus turbine CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
| Summary: | 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. |
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