Power System Operation
Mostrando 1-12 de 236 artigos, teses e dissertações.
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1. Equipment for Monitoring Synchronous Generators Condition through External Magnetic Field Waveforms
Abstract This paper presents an equipment for monitoring synchronous generators condition through characteristics of the time derivative of the external magnetic field. The developed monitoring methodology allows the identification of established or incipient faults, by detecting changes in the magnetic signature of the synchronous generator. In this methodo
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. Novel Design of a Hybrid Superconducting Fault Current Limiter with Controlled Solid-State Device
Abstract Fault current limiters are essential devices used to protect the power system and its equipment against high levels of fault current, which are growing up due to the increase of new power sources. This paper proposes a novel design of a Hybrid Superconducting Fault Current Limiter (Hybrid SFCL), which is composed basically by thyristors in series wi
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-06
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3. Performance Analysis of Small Grid Connected Photovoltaic Systems
Abstract The acceptance and deployment of electric power from sustainable sources, which are less polluting than fossils, have been a consensus throughout society. Specially, the growth of the installed capacity in photovoltaic energy has been considerable in distributed generation. In order to properly take advantage of this growing demand, it is necessary
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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4. Electromagnetic Core Analysis of a DFIG State-Feedback Power Controller
Abstract The energy demand by modern society grows every day that allied with sustainable development requires the use of alternative sources in the new energy matrix. In this context, the wind energy as source by using a doubly-fed induction generator stands out due to its operational savings but still faces some conflicts in its power control. This paper p
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 12/09/2019
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5. Kinetics drying of silver banana (Musa spp.) in hybrid dryer
RESUMO A busca pela redução de custos de produção e diversificação de comercialização de produtos agrícolas torna-se necessária para autonomia e aumento de renda dos produtores rurais. A utilização de secadores solares para produção de frutas secas consiste em excelente alternativa a ser adotada. No entanto, para a introdução desta tecnologia
Rev. Ciênc. Agron.. Publicado em: 04/07/2019
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6. TRACTIVE DEMAND, SOIL MOBILIZATION PARAMETERS, AND CORN YIELD IN COMPACTED OXISOL
ABSTRACT Direct seeding systems are characterized by soil disturbance only occurring in the sowing line and the maintenance of the remaining area is achieved by covering with crop residues. Without total area soil mobilization as recommended by the no-tillage system, associated with the increase in the degree of soil compaction caused by the traffic of agric
Eng. Agríc.. Publicado em: 2019-02
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7. Case-Based Reasoning for the Design of Start-Stop Logic of Hydroelectric Power Stations
ABSTRACT The present article focuses on the construction of an Intelligent System for the Project Start-Stop Logic of Hydropower Plants, work carried out as master dissertation, allowing the retention of knowledge of previous cases which set a valuable intellectual capital, organizing knowledge generated by specialists and consultants of the area. The tool a
Braz. arch. biol. technol.. Publicado em: 29/11/2018
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8. Characterization of grid-connected photovoltaic systems in Curitiba, Brazil
ABSTRACT In the search for new options for the establishment of the energy matrix of Brazil, the Grid-Connected Photovoltaic Systems (GCPVS) are configured as an alternative to urban centers, because they allow the power generation at distributed mode, that is, generate energy at the place where it will be consumed and inject the surplus energy into the netw
Braz. arch. biol. technol.. Publicado em: 29/10/2018
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9. State-of-the-Art Impacts of Smart Grid in the Power Systems Operation and Expansion Planning
ABSTRACT In this article, a state-of-the-art review on the impacts of Smart Grid in the operation and planning of the expansion of the Electric Power System is presented. The concept of Smart Grid is increasingly integrated in conventional networks, and the impact that this new technology generates on operation and planning must be investigated. Thus, in thi
Braz. arch. biol. technol.. Publicado em: 22/10/2018
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10. PERFORMANCE OF CORN SOWING IN FERTILIZATION SYSTEM AND INTERCROPPING
ABSTRACT The performance of the tractor-seeder can be influenced by factors related to the seeder, as loads and crop. The aim of the present study was to evaluate the performance of tractor-seeder at sowing in the corn crop in function of the fertilizer systems (at presowing and at sowing) and those intercropping of crops (corn + bean-Stizolobium deeringianu
Eng. Agríc.. Publicado em: 2018-04
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11. Low cost system to measure active power in electrosurgical units
Abstract Introduction: The real-time measurement of active power delivered to patients during the electrosurgical act is still an engineering challenge. Besides, there is no electrosurgical unit on the market capable of doing it according to the normative requirement. Methods This work presents the design of an electronic structure capable to probe the ele
Res. Biomed. Eng.. Publicado em: 09/11/2017
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12. MATHEMATICAL MODELING OF THE ELECTRIC CURRENT GENERATION IN A MICROBIAL FUEL CELL INOCULATED WITH MARINE SEDIMENT
Abstract Microbial fuel cells (MFC) are electrochemical devices that utilize the ability of some microorganisms to oxidize organic matter and transfer electrons resulting from their metabolism to an insoluble acceptor. The goal of the present study was to model the kinetics of electrical current generation from an MFC inoculated with marine sediment. For thi
Braz. J. Chem. Eng.. Publicado em: 2017-01