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Previous issue date: 2015-05-11 / A necessidade constante de novas fontes de energias renov?veis vem promovendo
cada vez mais o aumento de investimentos nessa ?rea. Dentre essas fontes, a energia
e?lica vem tomando grande destaque. Torna-se importante promover a busca pelo aprimoramento
das tecnologias envolvidas nas topologias de aerogeradores, buscando alternativas
que aumentem o rendimento obtido, apesar da irregularidade da velocidade do
vento.
Este trabalho apresenta um novo sistema para controle de velocidade, aqui aplicado
em aerogeradores, o Regulador Eletromagn?tico de Frequ?ncia (REF). Um dos dispositivos
mais utilizados em algumas topologias s?o as caixas de engrenagens mec?nicas
que, al?m de uma vida ?til curta, representam frequentemente, fontes de ru?do e defeitos.
O REF dispensa essas caixas de transmiss?o, representando um avan?o tecnol?gico, utilizando
para isso uma m?quina de indu??o adaptada, na qual o estator passa a ser m?vel,
solid?rio ao eixo da turbina.
Na topologia utilizada neste trabalho, o REF tamb?m permite dispensar o uso de conversores
eletr?nicos para estabelecer o acoplamento entre o gerador e a rede el?trica,
raz?o pela qual tamb?m proporciona a possibilidade de obten??o de gera??o em corrente
alternada, com tens?o e frequ?ncia constantes, onde n?o exista a rede el?trica.
Respons?vel pelo controle da velocidade mec?nica do gerador, o REF pode ser ?til
em outros sistemas de transmiss?o onde o controle de velocidade mec?nica de sa?da seja
o objetivo.
Al?m disso, por operar atrav?s da combina??o de duas entradas, uma mec?nica e outra
el?trica, o REF multiplica as possibilidades de aplica??es por ser apto ao acoplamento
sin?rgico entre energias de matrizes diferentes, e, por tais motivos, possibilita que as diversas
fontes de energia envolvidas sejam desacopladas da rede, sendo o gerador s?ncrono
o respons?vel pela conex?o do sistema com a rede el?trica, simplificando as estrat?gias
de controle quanto ? pot?ncia injetada na mesma.
Resultados de simula??o e experimentais s?o apresentados no decorrer do trabalho,
voltados a um aerogerador, validando a proposta em rela??o a efici?ncia no controle de
velocidade do sistema para diferentes condi??es de vento. / The constant necessity for new sources of renewable energy is increasingly promoting
the increase of investments in this area. Among other sources, the wind power has
been becoming prominent. It is important to promote the search for the improvement of
the technologies involved in the topologies of the wind turbines, seeking for alternatives
which enhance the gotten performance, despite the irregularity of the wind speed.
This study presents a new system for speed control, in this case applied to the wind
turbines - the Electromagnetic Frequency Regulator (EFR). One of the most used devices
in some topologies is the mechanical gearboxes which, along with a short service life,
often represent sources of noise and defects. The EFR does not need these transmission
boxes, representing a technological advancement, using for that an adapted induction
machine, in which the stator becomes mobile, supportive to the axis of the turbine.
In the topology used in this study, the EFR also allows us to leave out the usage of the
eletronic converters to establish the coupling between the generator and the electrical grid.
It also the reason why it provides the possibility of obtaining the generation in alternating
current, with constant voltage and frequency, where there is no electrical grid.
Responsable for the mechanical speed control of the generator, the EFR can be useful
in other transmission systems in which the mechanical speed control output is the
objective.
In addition, the EFR operates through the combination of two inputs, a mechanical
and other electrical. It multiplies the possibilities of application because it is able
to synergistic coupling between different arrays of energy, and, for such reasons, it enables
the various sources of energy involved to be uncoupled from the network, being
the synchronous generator responsible for the system connection with the electrical grid,
simplifying the control strategies on the power injected in it.
Experimental and simulation results are presented through this study, about a wind
turbine, validating the proposal related to the efficience in the speed control of the system
for different wind conditions.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/20227 |
| Date | 11 May 2015 |
| Creators | Silva, Paulo Vitor |
| Contributors | 10592709434, http://lattes.cnpq.br/4890839733220743, Ara?jo, Aldayr Dantas de, 10829741453, http://lattes.cnpq.br/3165031680223608, Salazar, Andr?s Ortiz, 51618362968, http://lattes.cnpq.br/7865065553087432, Salvadori, Fabiano, 36566497072, http://lattes.cnpq.br/0735993399553280, Oliveira, Jos? Tavares de, 05768632468, http://lattes.cnpq.br/0617813879678041, Medeiros J?nior, Manoel Firmino de, 09615687472, http://lattes.cnpq.br/4960078797028638, Miranda, Vladimiro Henrique Barrosa Pinto de, http://lattes.cnpq.br/5824178098755298, 00000000000, Ara?jo, Andr?s Ortiz, Pinheiro, Ricardo Ferreira |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA EL?TRICA E DE COMPUTA??O, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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