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Reconhecimento não-intrusivo de equipamentos elétricos empregando projeção vetorial
(Universidade Federal de Santa Maria, 2016-02-19)
Electricity consumption in homes and workplaces has been growing steadily over the
decades and attitudes to reduce these costs should be taken. An interesting solution is to provide
to electricity users, and also to the ...
Proteção contra perda de excitação em geradores síncronos: uma nova proposta utilizando o método do cálculo contínuo da impedância aparente
(Universidade Federal de Santa Maria, 2015-10-16)
This work presents a new Loss-of-Excitation in synchronous generators protection scheme based on the Continuous Apparent Impedance Calculation. This methodology aiming to improve security and dependability to the ANSI 40 ...
Método de carga para banco de baterias em fontes ininterruptas de energia que busca garantir o estado de carga completa: corrente pulsada modificado
(Universidade Federal de Santa Maria, 2015-02-15)
This Master s Dissertation is proposes the development of a charge management system of a bank of 16 lead-acid batteries with 7Ah load capacity, commonly used in Uninterruptible Power Supplies (UPS). This system aims to ...
Comparação de funções objetivo para seleção de PSS pelo amortecimento de oscilações em sistemas multimáquinas
(Universidade Federal de Santa Maria, 2015-12-15)
Small disturbances occur continuously in electrical systems mainly due to load and generation
variations. This ends up causing low frequency voltage fluctuations that are usually observed
in systems whose lines have weak ...
Sistema RGB com controle de fluxo luminoso e redução de variação cromática
(Universidade Federal de Santa Maria, 2014-07-10)
This work proposes a control methodology of luminous flux through independent sink temperature and current applied to red, green and blue LEDs. The main characteristics of solid-state lighting and LEDs themselves are ...
Contribuição às estratégias de controle para sistemas distribuídos de potência
(Universidade Federal de Santa Maria, 2013-07-31)
A distributed power supply composed of multiple DC-DC converters connected in parallel offers several advantages in comparison to a centralized solution. Among these benefits are the following: redundancy, system modularity, ...
Estudo das características de materiais magnéticos aplicados ao acionamento de lâmpadas fluorescentes sem eletrodos
(Universidade Federal de Santa Maria, 2014-04-02)
This paper presents a study of the characteristics of magnetic materials. The application of this study is the feeding of an electrodeless fluorescent lamp (EFL). This type of lamp is driven by electromagnetic effects and, ...
Controle de corrente aplicado a conversores PWM conectados à rede elétrica sem sensor de tensão CA utilizando observadores de corrente por modos deslizantes
(Universidade Federal de Santa Maria, 2014-08-22)
This master thesis presents a current sliding mode observer for voltage sensorless
grid connected converters. To perform the grid synchronization a sliding mode current
observer in stationary axes αβ is proposed. Aiming ...
Metodologia para análise da coordenação e seletividade de dispositivos de proteção durante reconfigurações de redes de distribuição
(Universidade Federal de Santa Maria, 2014-03-28)
With the emergence of the concept of Smart Grid (SG), the Power Distribution Systems are undergoing major changes in the way it is operated, studied and analyzed. The breakthrough technology of measurement, automation, ...
Proteção de transformadores de potência eclassificação de transitórios elétricos por meio da transformada wavelet discreta
(Universidade Federal de Santa Maria, 2014-02-20)
This dissertation presents the development of an algorithm for classifying
electrical transients in power transformers for protection. Initially the main transient
involving power transformers were analyzed, with a special ...