Sistema de conversão de energia eólica interligado à rede

Detalhes bibliográficos
Ano de defesa: 2016
Autor(a) principal: Guimarães, Jéssica Santos
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Não Informado pela instituição
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://www.repositorio.ufc.br/handle/riufc/16521
Resumo: This master thesis presents the development of a Wind Energy Conversion System (WECS) with Permanent Magnet Synchronous Generator (PMSG) operating at variable speed. The energy processing circuit is divided into two stages. In the AC-DC stage, an unidirectional three-phase bridgeless boost topology absorbs the energy supplied by the generator and injects it into the DC link. In this converter, the self-control technique allows the current extraction with low THD and high power factor. Furthermore, a - Maximum Power Point Tracking (MPPT) determines the rotational speed of the generator that will ensure the proper operating point. This mode of operation is maintained while the available power remains lower than the converter rated power. Otherwise, the MPPT algorithm is disabled and a mechanical power control loop ensures the rated power condition. On the DC-AC conversion stage, a three-phase full-bridge inverter, whose control is based on the theory of instantaneous power, provides energy to the grid complying with regulatory requirements. A complete theoretical analysis is presented as well as the simulation results considering the prototype with a rated power of 6 kW equivalent of wind turbine used. Satisfactory experimental results are shown to an output of 3 kW: the efficiency of the total system is above 90%; the current through the generator has a THD of about 2.6% with a power factor of 0.942; moreover, the current injected into the grid has a THD of about 1.639% and a power factor of 0.994.