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Localização de falta de alta impedância em sistemas de distribuição: uma abordagem no domínio da frequência e estimação de parâmetros através do MMQP
(Universidade Federal de Santa Maria, 2018-04-23)
High impedance fault location still represents a challenge for protection engineers of electric
power utilities. Such a challenge remains a very critical point and of great concern to
utilities, as this type of fault can ...
Metodologia de blocos funcionais com previsão de grandezas elétricas para sistemas de distribuição inteligentes
(Universidade Federal de Santa Maria, 2018-03-22)
Distribution systems are undergoing structural and topological changes, mainly due to the influence of the new distributed energy resources inserted along the feeders. In this context, the growth of the Smart Grids requires ...
Controle e supervisão de fonte ininterrupta de energia híbrida
(Universidade Federal de Santa Maria, 2017-02-13)
This work presents contributions to the modeling, control and management of an
hybrid uninterrupted power supply (UPS) based on Otto cycle power generator set and
lead acid battery bank. The proposed configuration is ...
Metodologia híbrida para alocação, coordenação, dimensionamento e adequação do sistema de proteção em sistemas de distribuição de energia elétrica com geração distribuída diretamente acoplada
(Universidade Federal de Santa Maria, 2017-02-01)
This work aims to allocate, size and coordinate protective devices in electric power systems with directly coupled distributed generation and also to adequate protection systems to accommodate these sources. Currently, it ...
Contribuições ao projeto de sistemas eólicos de efeito magnus com rastreamento da máxima potência
(Universidade Federal de Santa Maria, 2016-08-26)
This work deals with an unconventional wind energy conversion system, in which the wind turbine has rotating cylinders rather than traditional blades. These cylinders can be driven by a brushless DC motor. The turbine ...
Metodologias para modelagem de cargas de consumidores de baixa tensão considerando a integração de resposta da demanda, geração distribuída e veículos elétricos
(Universidade Federal de Santa Maria, 2017-03-03)
Accurate load modeling is a crucial task in distribution systems expansion planning. Traditionally, the load peak, which is viewed as the worst-case scenario, has been used to quantify new investment requirements. However, ...
Modulação descontínua para conversores com pernas em paralelo magneticamente acopladas
(Universidade Federal de Santa Maria, 2017-03-10)
Aiming to contribute to modulation strategies for converters with magnetically coupled
parallel legs, a new strategy of discontinuous carrier modulation is developed for this class
of converters. To clarify the strong ...
Estratégia de controle Volt/VAr Coordenado para sistemas de distribuição inteligentes
(Universidade Federal de Santa Maria, 2018-03-26)
This work presents contributions to the study and development of Voltage and
Reactive Power Control (Volt/VAr control or VVC) for intelligent distribution systems.
Currently, the use of VVC is considered one of the most ...
Modelagem da capacitância de elementos magnéticos para elevadas frequências e classes de isolação
(Universidade Federal de Santa Maria, 2018-08-27)
This PhD thesis presents the development of models of magnetic elements for high frequency and insulation classes. Currently, there is an increasing demand for implementation of such elements as the power electronics has ...
Novos métodos para prover segurança à comunicação no âmbito de redes elétricas inteligentes
(Universidade Federal de Santa Maria, 2018-03-23)
Information and communication technologies (ICT) incorporated into the power grid allows
the full implementation of the smart grids (SG) concept. Among the segments of the power
grid, providing this integration to energy ...