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Projeto e desenvolvimento de um microinversor buck de elevado rendimento conectado à rede elétrica com filtro LCL
(Universidade Federal de Santa Maria, 2018-08-06)
Micro-inverters are small single-phase photovoltaic power generation modules that connect directly to
a photovoltaic panel and the electrical grid, which typically consist of a DC-DC stage and a DC-AC
stage. The topology ...
Indicador de vulnerabilidade operacional para priorização e substituição de transformadores de potência em subestações
(Universidade Federal de Santa Maria, 2018-02-19)
This thesis presents a new methodology for the classification and substitution of power
transformers in substations. The thesis proposes the use of the Operational Vulnerability
Indicator (OVI), which consists of two ...
Estratégias multimalhas para controle de corrente de inversores conectados à rede por meio do filtro LCL
(Universidade Federal de Santa Maria, 2018-02-26)
This master thesis presents contributions to the study and development of current
control of the grid-tied inverter through an LCL filter, by using multiloop control strategies.
In the first proposed scheme, the inner ...
Sistema de controle para conversores modulares multiníveis utilizados em conexões HVDC de parques eólicos offshore
(Universidade Federal de Santa Maria, 2018-02-27)
This work presents a brief history of the wind generation system in general and
the detailed history of the offshore wind generation system. Current data on installed
capacity, power of used wind turbines and distance ...
Estimação fasorial para relés de proteção numéricos usando redes neurais artificiais e o algoritmo de Levenberg-Marquardt
(Universidade Federal de Santa Maria, 2018-03-16)
In this work, two methodologies for phasor estimation in numerical protective relays in
Electrical Power Systems will be presented: one based on Artificial Neural Networks, and another
based on the Levenberg-Marquardt ...
Método para detecção de oscilação de potência no domínio do tempo
(Universidade Federal de Santa Maria, 2018-03-09)
This work proposes two techniques for the detection of power swings and blocking of distance
relays on transmission lines to prevent undue shutdowns. If a fault occurs during power swing,
it must be immediately detected ...
Imunidade contra surtos de tensão em sistemas de iluminação
(Universidade Federal de Santa Maria, 2018-02-28)
This work presents a new point of view about electrolytic capacitor reduction in lighting
systems. While most of studies focus only in the functionality of the driver, as ripple current
and time response they don’t check ...
Sistema de supervisão local/remoto para pequenas centrais de geração elétrica
(Universidade Federal de Santa Maria, 2018-03-23)
Supervisory systems are widely used in power generation systems. They allow
operation analysis by means of a human-machine interface, which acts on the plant. In
addition, supervisory systems can be used to check operating ...
Aumento da eficiência total de armazenadores de energia compostos por eletrolisadores, células a combustível e hidretos metálicos
(Universidade Federal de Santa Maria, 2018-03-26)
The growing global energy consumption, the search for reduction in carbon emissions and
climate problems highlight the importance of investment in low environmental impact energy
systems. In this sense, the Generation ...
Impacto do controle Volt/VAr em redes de distribuição a partir da exploração do potencial dos inversores de sistemas fotovoltaicos
(Universidade Federal de Santa Maria, 2018-08-29)
The presence of Distributed Generation is a reality in the Brazilian electric sector, with the prospect that increasingly the participation of these sources contributes to the energy matrix of our country. Faced with this ...