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Controle adaptativo robusto de estrutura variável por modelo de referência aplicado a filtros ativos de potência
(Universidade Federal de Santa Maria, 2010-08-27)
This works presents a Robust Variable Structure Model Reference Adaptive Control scheme denoted VS RMRAC. In this adaptive control strategy, each parameter of the control law is obtained by the sum of two other adaptive ...
Contribuição ao estudo do gerador de indução duplamente alimentado: operação durante distúrbios na rede elétrica
(Universidade Federal de Santa Maria, 2010-08-30)
The Doubly Fed Induction Generator (DFIG) is one of the most frequently deployed large grid connected Wind Turbines (WT) concept. The implementation of classical
vector control techniques, have been proven to work well for ...
Avaliação da qualidade de energia e performance de potência de turbinas eólicas conectadas à rede elétrica
(Universidade Federal de Santa Maria, 2010-02-22)
This master thesis describes a system capable of real-time characterization of power performance and power quality of wind turbines, based mainly on the IEC 61400-21 and IEC 61400-12-1 standards. To verify the performance ...
Aspectos técnicos e operacionais do uso de microturbinas conectadas aos sistmas elétricos para geração distribuída de energia
(Universidade Federal de Santa Maria, 2010-06-16)
The considerable increase in energy demand has increased the interest in reducing costs, improving reliability, quality and stability of power generation systems. The connection of distributed generation (DG) can be used ...
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. ...
Utilização da metodologia ahp para alocação de equipamentos telecomandados em sistemas de distribuição para melhoria da confiabilidade
(Universidade Federal de Santa Maria, 2010-09-22)
In power utilities the subject reliability is a permanent worry. In this new context, some solutions have been developed and researched to an alternative to improve the performance on service restoration when there are ...
Controle supervisório aplicado a sistemas fotovoltaicos autônomos com topologia multi string
(Universidade Federal de Santa Maria, 2010-03-05)
This master thesis analyses and implements a stand-alone photovoltaic system based on decentralized Multi String topology. The proposed system is composed of a set of DCDC
converters linked to the PV arrays of panels, ...
Modelo para a análise econômica e financeira em projetos para geração distribuída de energia com fontes alternativas
(Universidade Federal de Santa Maria, 2010-09-27)
The implementation of distributed generation (DG) offers many benefits to the society, the electrical sector where they operate, and the consumers connected to the network especially due to their electricity self-production. ...
Estudo e comparação de sistemas de acionamento para aplicações de alta potência e média tensão
(Universidade Federal de Santa Maria, 2010-08-24)
This Ph.D. Thesis proposes a comparison of modulation techniques, semiconductors devices technologies and topologies for multilevel inverters, in order to point out the multilevel drive system that presents the best ...