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Estudo, controle e implementação do conversor Boost PFC operando no modo de condução mista
(Universidade Federal de Santa Maria, 2009-11-10)
This Master Thesis presents the study and proposes a digital control system applied to the PFC boost converter operating in mixed conduction mode. The motivation to this subject, a bibliographic review of the existing ...
Tranformada wavelet e redes neurais artificiais na análise de sinais relacionados à qualidade da energia elétrica
(Universidade Federal de Santa Maria, 2009-02-10)
This work presents a different method for power quality signal classification using the principal components analysis (PCA) associated to the wavelet transform (WT). The standard deviation of the detail coefficients and ...
Integração de pilhas de células a combustível com outras fontes alternativas de energia
(Universidade Federal de Santa Maria, 2009-03-31)
This dissertation presents a project of a integrated system with distinct energy generating modules using a wind generator, photovoltaic generator, fuel cells stack
(FCs) and an accumulator of energy formed by a bank of ...
Contribuição ao estudo de estratégias de modulação aplicadas a conversores multiníveis com diodos de grampeamento
(Universidade Federal de Santa Maria, 2009-04-30)
This dissertation deals with modulation techniques for multilevel diode clamped converters.
The major challenge to be overcome by modulation strategies to these converters
is the balance of the dc-link voltage capacitors, ...
Métodos para otimização dos ajustes dos reguladores de tensão e zonas de tap em sistemas de distribuição
(Universidade Federal de Santa Maria, 2009-08-07)
The new regulations in the electric sector utilities have have requested greater efficiency and quality both in terms of continuity and in conformity of the energy
supplied. Electrical equipments quality, efficiency and ...
Análise comparativa de conversores monofásicos aplicados a correção de fator de potência
(Universidade Federal de Santa Maria, 2009-08-12)
This work presents a study and a comparative analysis of high power single-phase converter applied to power factor correctioii in according to the international standards IEC
61000-3-4 (harmonics limitation) and CISPR 22 ...
Uma nova metodologia de projeto para otimização do volume do converosr boost PFC
(Universidade Federal de Santa Maria, 2009-03-27)
This work investigates the influence of operation point (Δi @ fs) in the final volume of PFC boost converter. The boost inductor, EMI filter and thermal heatsink are the elements which main influences in the converter ...
Otimização da confiabilidade de sistemas de distribuição de energia elétrica: uma abordagem considerando a seleção e alocação de dispositivos de proteção e manobras
(Universidade Federal de Santa Maria, 2009-03-27)
One of the main goals of the electric utilities is to provide energy to its customers in a reliable and low
cost way. Traditionally, the electricity sector regulatory commissions impose continuity targets, which must be ...
Metodologia de síntese de topologias ZVT simplificadas aplicadas a pólos PWM bidirecionais
(Universidade Federal de Santa Maria, 2009-11-27)
Among the soft-switching techniques, the zero-voltage-transition (ZVT) technique has been accepted well by the industry due its attractive characteristics, such as simplicity, low losses in the auxiliary commutation circuit ...
Análise e controle de gerador síncrono a ímã permanente aplicado a sistema de conversão de energia eólica
(Universidade Federal de Santa Maria, 2009-06-26)
This dissertation addresses the analysis and control of permanent magnet synchronous generators (PMSG) found in wind energy conversion system. The operation modes of the
wind turbine the current and voltage constraints ...