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Desenvolvimento de metodologia do projeto do reator eletrônico auto-oscilante com entrada universal
(Universidade Federal de Santa Maria, 2010-01-14)
This work presents the design and analysis of an electronic system with universal input to supply a fluorescent lamp. The system includes a self-oscillating electronic ballast and an additional circuit which allows keeping ...
Desenvolvimento de uma fonte de potência CA para geração de formas de onda de até 2kHz
(Universidade Federal de Santa Maria, 2010-07-30)
This work presents the development of an alternating current power source with a single-phase full bridge voltage inverter, based on electronic switches. The source is designed to drive electromechanical and electric plants. ...
Proposta de um sistema híbrido composto por redes neurais artificiais e algorítmos genéticos para o tratamento de alarmes e o diagnóstico de faltas em sistemas elétricos de potência
(Universidade Federal de Santa Maria, 2011-02-18)
This work proposes a hybrid system for alarm processing and fault diagnosis in
electrical networks which use two methods of computational intelligence: Generalized
Regression Neural Network and Genetic Algorithms. The ...
Um controle ótimo aplicado a fontes ininterruptas de energia: projeto, validação experimental e análise de desempenho
(Universidade Federal de Santa Maria, 2011-02-17)
This work presents as contributions a design procedure for controllers applied to single-phase uninterruptible power supplies and the certification of the closed-loop stability
and performance using linear matrix inequalities. ...
Aproveitamento de fontes alternativas para redução do consumo de energia elétrica e reflexos nos seus custos
(Universidade Federal de Santa Maria, 2011-09-17)
Residential consumption accounts for around one third of total energy consumed in Brazil. The electric shower is the main component of this consumption, along with air conditioning. Hence, much research has been conducted ...
Análise de estabilidade de retificadores com correção de fator de potência empregando modelos lineares periódicos no tempo
(Universidade Federal de Santa Maria, 2012-07-30)
Many control techniques applied to converters with power factor correction (PFC) use
cascaded control to compensate the output voltage and the input current. These techniques
usually employ linear time-invariant (LTI) ...
Uma proposta de interconexão de proteções para detecção de ilhamento em sistemas de geração distribuída
(Universidade Federal de Santa Maria, 2014-02-27)
This work presents a methodology for detecting islanding in distributed generation
systems - DG - which use internal combustion engines as primary sources and synchronous
generators connected directly to grid. The proposed ...
Aumento da eficiência de painéis fotovoltaicos com esfriamento por energia geotérmica e aquecimento de água
(Universidade Federal de Santa Maria, 2014-02-24)
This thesis deals with the increased efficiency of photovoltaic panels (PVs) through
cooling the cells by geothermal energy and water heating. Initially, a photovoltaic modeling is
made proposing an equation to obtain the ...
Sistema eletrônico isolado com elevado fator de potência e reduzidas capacitâncias para alimentação de leds aplicado à iluminação pública
(Universidade Federal de Santa Maria, 2013-08-06)
This work aims to develop a family of electronic converters with electrical isolation to supply a group of power light emitting diodes, applied to street lighting systems. The converters have high power factor and still ...
Comutador eletrônico de taps aplicado a um transformador de distribuição monofásico
(Universidade Federal de Santa Maria, 2014-02-27)
Voltage regulation still is a problem faced by power utilities currently. In addition to the series
impedance and the significant load variation of the distribution grids, the main causes of voltage
regulation problems, ...