Navegando por Assunto "Aerogeradores síncronos"

Agora exibindo 1 - 2 de 2

Acesso aberto (Open Access)
Avaliação de estratégias de controle de potência reativa de aerogeradores síncronos em redes elétricas
(Universidade Federal do Pará, 2009-18-11) NASCIMENTO, André Cavalcante do; BEZERRA, Ubiratan Holanda; http://lattes.cnpq.br/6542769654042813; NUNES, Marcus Vinícius Alves; http://lattes.cnpq.br/9533143193581447
In the present work a methodology of reactive power injection in electric grids during voltage dips provoked by short-circuit, in connected wind farms, adopted at some countries with technological maturity in the production of wind energy in the world is evaluated. In the developed studies, the direct drive synchronous wind generator was used with full converter due to the high controllability of the converter connected to the electric grid and for possessing high capacity of reactive power supply, compared to other wind generators technologies. In Brazil, the grid code to connect wind farms to the electric grids, defined by the National Operator of the Electrical System, doesn't stipulate yet the need of adoption of such methodology during faults in the electric grid. It just specifies the ride through apability curve for voltage dips that the wind generators should follow to avoid the trip of the undervoltage relay. Criteria of the synchronous wind generators protection are evaluated starting from short-circuit simulations in a test grid with adoption of the Brazilian grid code, without reactive power injection, being compared with those of other countries that adopt reactive power injection curves.
Acesso aberto (Open Access)
Modelagem e avaliação de estabilidade transitória de aerogeradores síncronos com magneto permanente em sistemas de energia elétrica
(Universidade Federal do Pará, 2005-04-29) SANTOS, Fernando Manuel Carvalho da Silva; NUNES, Marcus Vinicius Alves; http://lattes.cnpq.br/9533143193581447; BRANCO, Tadeu da Mata Medeiros; http://lattes.cnpq.br/8911039344594817
This work presents a study of the dynamic behaviour of permanent magnet variable speed wind generators, comparing it with doubly-fed and squirrel cage assynchronous generators. It also presents transient studies that have to be considered when evaluating the impacts of the grid-connection of wind turbines in the presence of the three technologies mentioned above, inserted in a standard electrical power system and supposing the operation of the wind farm together with conventional generation sources that use a diesel prime mover. The studies developed in this work are simulated through an algorithm of transient stability analysis, developed on MATLABTM computational programming language.