Submitted by Marlucy Farias Medeiros (marlucy.farias@unipampa.edu.br) on 2017-10-31T16:36:39Z No. of bitstreams: 1 John Jefferson Antunes Saldanha - 2017.pdf: 2295770 bytes, checksum: 7d9b5b6835d3e02633dca3155dd44fe7 (MD5) / Approved for entry into archive by Marlucy Farias Medeiros (marlucy.farias@unipampa.edu.br) on 2017-10-31T18:24:47Z (GMT) No. of bitstreams: 1 John Jefferson Antunes Saldanha - 2017.pdf: 2295770 bytes, checksum: 7d9b5b6835d3e02633dca3155dd44fe7 (MD5) / Made available in DSpace on 2017-10-31T18:24:47Z (GMT). No. of bitstreams: 1 John Jefferson Antunes Saldanha - 2017.pdf: 2295770 bytes, checksum: 7d9b5b6835d3e02633dca3155dd44fe7 (MD5) Previous issue date: 2017-09-28 / Uma difusão considerável p elo uso dos veículos elétricos plug-in (VEPs) tem sido promovida, de modo a reduzir as emissões poluentes dos veículos movidos a combustão, bem como preservar as fontes de energia fóssil. Entretanto, cabe ressaltar que os VEPs necessitam se conectar a rede elétrica para recarregar suas baterias. Nesse contexto, caso uma quantidade significativa de veículos elétricos plug-in solicitem recarga ao mesmo tempo, a operação do sistema elétrico de potência (SEP) será comprometida. Em contrapartida, os VEPs também podem auxiliar a rede elétrica através do controle da taxa de recarga e injeção de energia ativa. Assim, é importante realizar o controle da recarga dos VEPs. Dessa forma, este trabalho propõe um sistema inteligente fundamentado em duas interfaces para controlar a taxa de recarga dos VEPs. A primeira interface visa controlar a taxa de recarga de uma frota de veículos com base em um controlador lógico fuzzy projetado e posteriormente ajustado. Nesta interface, buscam-se atender os requisitos do consumidor. Na segunda, gerenciam-se diversas frotas de VEPs visando minimizar perdas de energia e desvios de tensão na rede elétrica. Os resultados da primeira interface mostram que ambos os controladores projetado e ajustado respondem ao cálculo da taxa de recarga levando em consideração as informações inseridas pelo consumidor. Em adição, a resposta do controlador ajustado é mais próxima da resposta desejada, comparando com o controlador projetado. Os resultados da segunda interface mostram que o método de otimização reduziu as perdas de energia elétrica e os desvios de tensão no sistema teste estudado. Concomitantemente, a energia entregue para os VEPs aumentou de maneira significativa. Desta forma, com o sistema desenvolvido, espera-se reduzir o impacto no sistema elétrico de potência e otimizar sua operação, beneficiando a concessionária local, a rede elétrica e o consumidor. / In the present work we investigated experimentally and theoretically the photophysical characterization of organic compounds of the type benzothiazoles, targeting applications in optoelectronic devices, mainly in organic light emitting diodes and photoelectric devices. The study was developed to identify the optical and structural properties of the compounds and the effect of the addition of an amine radical on the ring PhO (benzene-bound benzene) of the benzothiazole compound. Other variations were analyzed, such as changes in the positions of the amine radical added to said compound and absence of the hydroxyl radical. Absorption and photoluminescence experiments were carried out with the purpose of verifying the excitation and fluorescence energies of the compounds, as well as Stokes displacement. The photophysical characterization was also investigated theoretically by means of an ab initio or first principles computational model based on the Density Functional Theory (DFT), implemented in the Gaussian® program, which uses quantum mechanics to calculate the molecular structures and their vibrational properties. We investigated the molecular geometric structure, obtaining the interatomic distances, structure of electronic orbitals, diagrams of energy bands, molecular vibrations and frequency of vibrational modes. By means of Raman spectroscopy, the frequencies of the active Raman vibrational modes were obtained, allowing the comparison with the theoretical results of the simulations. The compounds 4HBS, 4HBSN and 5HBS have their first theoretical characterization from the study of this dissertation.

Orientador: Prof. Dr. Alfeu Joãozinho Sguarezi Filho / Dissertação (mestrado) - Universidade Federal do ABC, Programa de Pós-Graduação em Engenharia Elétrica, 2015. / This research project presents the active and reactive power control of the Doubly Fed Induction Generator (DFIG) employing fuzzy logic for a wind power generation system, the proposed controller is a Fuzzy Logic Controller Takagi Sugeno type (TS FLC) which determines the rotor voltage by the rules base dened by a linear combination of the membership sets of the rotor current error, that reduces the complexity of the structure and consequently a lower computational cost and its easy to implement on a experimental set compared to other controllers such as Fuzzy Mamdani type. System control is accomplished using Stator Flux Field Oriented Control with Space Vector Modulation and computer simulation using mathematical models implemented in Matlab/Simulink. The results indicates that the FLC TS could be an interesting alternative to conventional controllers in the power control of the DFIG during normal operation conditions and under balanced voltage sags conditions.