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Contribuições ao controle do motor síncrono de ímã permanente com FCEM não senoidal
(Universidade Federal de Santa Maria, 2015-08-20)
This thesis presents contributions to the sensorless vector control of Permanent
Magnet Synchronous Motors (PMSM) with nonsinusoidal back Electromotive Force (back-
EMF), whose magnets are allocated on the rotor surface. ...
Seleção ótima de baterias armazenadoras de energia em redes de distribuição com geração distribuída considerando modelagem da operação por redes neurais
(Universidade Federal de Santa Maria, 2019-05-27)
This thesis presents a methodology for optimal determination of type, bar, and capacity of
Battery Energy Storage Systems (BESS) in distribution systems with distributed generation
(DG) where the battery optimal operation ...
Inversor multiníveis quasi-Z-source com fonte CC única e compartilhamento de potência ativa entre os módulos
(Universidade Federal de Santa Maria, 2019-07-26)
Due to its ability to provide Maximum Power Point Tracking (MPPT) control and independent
regulation of the DC bus voltage, this makes the inverter quasi-Z-Source (qZS) an attractive
candidate for applications in ...
Substituição de transformadores de potência em subestações de energia: uma estratégia global
(Universidade Federal de Santa Maria, 2019-05-30)
The knowledge of the operating conditions of power transformers in substations is of great relevance to the power system in order to improve their reliability. From the point of view of the concessionaires, it is necessary ...
Determinação das características do solo visando o aproveitamento geotérmico como fonte renovável de energia
(Universidade Federal de Santa Maria, 2019-03-29)
Knowledge of the soil thermal characteristics is indispensable for dimensioning geothermal
exchangers for air conditioning or yet to decrease their electric consumption. The present
thesis evaluates the geothermal potential ...
Contribuição ao controle sensorless de motores síncronos de ímãs permanentes
(Universidade Federal de Santa Maria, 2019-12-05)
This thesis presents contributions to sensorless control for permanent magnet synchronous
motors. A maximum torque per ampere strategy is used to generate the current
control reference in synchronous reference frame. ...
Controle robusto H∞ por meio de LMIS aplicado a conversores conectados
(Universidade Federal de Santa Maria, 2019-12-16)
This work presents a robust current control for grid-connected converters subject
to uncertain parameters in the grid impedance. Specifically, a voltage source inverter is
connected by means of an LCL filter to a ...
Gestão organizacional da geração distribuída em concessionárias de energia elétrica no Brasil
(Universidade Federal de Santa Maria, 2019-12-19)
The transformation of the electricity sector towards a more diversified and sustainable electricity production has spread the importance of generation distributed from renewable sources. Despite the national scenario of ...
Estudo, análise e implementação de uma metodologia para otimização de rendimento em sistemas compostos por conversores em paralelo
(Universidade Federal de Santa Maria, 2014-09-05)
This PhD Dissertation proposes a new methodology for efficiency maximization in systems
comprising parallel converters. For a given number of system converters, their maximum
power and their efficiency curves, the proposed ...
Método ativo virtual para detecção de ilhamento em geradores síncronos distribuídos
(Universidade Federal de Santa Maria, 2019-01-10)
This work presents a local and passive islanding detection method for synchronous distributed
generation (DG) directly connected to the distribution power system. Due to the characteristics
of these generation system, ...