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Mostrando ítems 11-20 de 440
Multiple-Vector Model Predictive Power Control for Grid-Tied Wind Turbine System With Enhanced Steady-State Control Performance
(2017)
Direct model predictive control (DMPC) is a promising alternative for power electronics and electric drives. It takes the switching nonlinearity of the power converters and system constraints into consideration, without ...
QUANTIFICATION OF WIND RESOURCES IN THE STATE OF PIAUÍ THROUGH COMPUTER SIMULATIONSQuantificação dos Recursos Eólicos no Estado do Piauí através de Simulações Computacionais
(Universidade Federal de Santa Maria, 2016)
Mesospheric wind estimation with the Jicamarca MST radar using spectral mainlobe identification
(American Geophysical Union, 2019-12)
MST (mesosphere, stratosphere, troposphere) radar observations at Jicamarca use four antenna beams, one vertical, others tilted to the east, west, and south, to detect the scattered pulse returns from mesospheric heights ...
Contribuição ao estudo da máquina assíncrona trifásica duplamente alimentada aplicada a aerogeradores de velocidade variável
(Universidade Federal de Santa MariaBREngenharia ElétricaUFSMPrograma de Pós-Graduação em Engenharia Elétrica, 2006-07-28)
This work presents the analysis and implementation of a vector control applied to Doubly-Fed Induction Generators (DFIG) used in grid connected wind turbines. DFIG s are
nowadays the more widely used concept for grid ...
On the application of hierarchical cluster analysis for synthesizing low-level wind fields obtained with a mesoscale boundary layer model
(Wiley, 2013-07)
Hierarchical clustering is applied to a boundary layer model output that describes the low-level wind field over the La Plata River region of South America. The model output consists of 180 17-dimensional vectors per season ...
Attraction of the sand fly Nyssomyia neivai (Diptera: Psychodidae) to chemical compounds in a wind tunnel
(Biomed Central Ltd, 2015-03-07)
Background: Similar to other hematophagous insects, male and female sand flies must feed on plants to obtain sugar and, subsequently, energy to complete their life cycles. A large number of compounds emitted by plants may ...
Separation of Frequency Coexisting Vibration Signals in Wind Turbines Gearboxes
(Universidade Federal de Santa Maria. Programa de Pós-Graduação em Engenharia Elétrica, 2018-10-21)
In this paper, a method for separation of vibration signals coexisting in the same frequency bin and coming from different mechanicals pieces is presented. A blind source separation method for vibration signals in gearboxes ...
Diagnóstico de desequilíbrio de massa para rotores de aerogeradores utilizando máquina de vetores de suporte
(Universidade Federal de Santa MariaBrasilEngenharia ElétricaUFSMPrograma de Pós-Graduação em Engenharia ElétricaCentro de Tecnologia, 2021-02-26)
Condition monitoring systems (CMS) are essential to reduce costs in the wind
energy sector. This paper proposes a method based on Support Vector Machine (SVM)
to detect rotor mass imbalance for a multi-class problem, ...
Three-Dimensional Wind Measurements and Modeling Using a Bi-Static Fabry-Perot Interferometer System in Brazil
(University of Illinois at Urbana-Champaign, 2013)
The earth’s upper atmosphere has been studied for over a century now, and while a multitude of data has been collected studying the plasma in the ionosphere, there are not equivalent amounts of data on neutrals in the ...