Power Quality Monitor
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Corrosão em estacas metálicas de torres de energia elétrica
RESUMO Para se manter a qualidade e continuidade do fornecimento de energia é essencial monitorar a integridade da estrutura das torres de transmissão usualmente executadas em aço. Por isso, avaliou-se a corrosividade do solo na região amazônica no trecho Vila do Conde-Tucuruí́, no estado do Pará. Foi analisado a resistividade, potencial estrutura-so
Matéria (Rio J.). Publicado em: 20/05/2019
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2. Análise das variáveis de entrada de uma rede neural usando teste de correlação e análise de correlação canônica / Analysis of input variables of an artificial neural network using bivariate correlation and canonical correlation
The monitoring of variables and diagnosis of sensor fault in nuclear power plants or processes industries is very important because an early diagnosis allows the correction of the fault and, like this, do not cause the production interruption, improving operators security and its not provoking economics losses. The objective of this work is, in the whole of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/09/2011
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3. Estimador de variações de tensão de curta duração em sistemas elétricos de potência utilizando estratégias evolutivas. / Estimate short duration voltage variation using evolutionary strategies.
A methodology is herein proposed to estimate Short Duration Voltage Variation (SDVV) in electric power systems, caused by electrical faults. To attain this target, values recorded by measurement equipment in specific sites are used. In fact, there are few power quality meters installed in power networks, due to the high cost of such meters. Although these co
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/09/2011
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4. ANÁLISE DE COMPONENTES INDEPENDENTES APLICADA EM DISTÚRBIOS DE QUALIDADE DE ENERGIA
This dissertation presents the development of a technique for power quality analysis, considering the case of multiple disturbances. The purpose is to separate the disturbances that are occurring in sequence or at the same time, in voltage signals of the electric power systems. For this, is used the philosophy of blind source separation, with the assumption
Publicado em: 2009
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5. Evaluation of boom hydraulic sprayers in the region of Uberlândia-MG / Avaliação de pulverizadores hidráulicos de barra na região de Uberlândia-MG
Any and every manner of pesticide application represents environmental risks, which must be minimized by the use of proper knowledge and technology, assuring a sustainable food production. Often, great importance is given to the pesticide and little to the application technique. The identification of the conservation state and mode of use of the sprayers in
Publicado em: 2009
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6. Power quality measuring equipment proposal based on virtual instruments conception / Proposta de equipamento para medição dos fenômenos relativos à qualidade da energia elétrica utilizando conceitos de instrumentos virtuais
Este trabalho apresenta um estudo da literatura pertinente sobre qualidade da energia elétrica. O estudo apresentado está baseado na evolução do tema em nível nacional e internacional, buscando explicar o conceito dos principais fenômenos e selecionar as recentes resoluções e normas que regem os princípios de medição e os limites dos distúrbios e
Publicado em: 2008
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7. Methodology for monitoring voltage SAGs and SWELLs in power systems. / Metodologia para a monitoração eficiente de variações de tensão de curta duração em sistemas elétricos de potência.
This dissertation presents a methodology based on Genetic Algorithms and Fuzzy Mathematical Programming to determine the optimum number of power quality monitors and the locations they should be installed to measure Voltage Sags and Swells in transmission power networks. The methodology developed represents a tool for planning power networks, because it indi
Publicado em: 2007
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8. DEVELOPMENT OF AN ARTIFICIAL NEURAL NETWORK FOR MONITORING AND DIAGNOSIS OF SENSOR FAULT AND DETECTION IN THE IEA-R1 RESEARCH REACTOR AT IPEN / "Utilização de redes neurais artificiais na monitoração e detecção de falhas em sensores do Reator IEA-R1"
The increasing demand on quality in production processes has encouraged the development of several studies on Monitoring and Diagnosis Systems in industrial plant, where the interruption of the production due to some unexpected change can bring risk to the operators security besides provoking economic losses, increasing the costs to repair some damaged equ
Publicado em: 2006
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9. Padronização do índice de abundância e avaliação do estoque de bonito listrado, (Katsuwonus pelamis Linnaeus, 1758), do Atlântico Ocidental.
In this paper data on catch, fishing effort and landings from the Brazilian baitboat fishery, together with information on vessel characteristics were analyzed aiming to: (a) describe the fishery and characteristics of the fishing fleet, analyze catch composition and spatial and temporal distribution of catches, fishing effort and catch rates of skipjack (Ka
Publicado em: 2006
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10. O enfoque da qualidade aplicado a prestação de serviços de distribuição de energia eletrica no Brasil
This work makes an approach of the quality focus applied to the services rendered by electric power distribution utilities in Brazil. Through a case study, it analyzes the impacts of quality actions and the current results of Companhia Paulista de Força e Luz - CPFL s performance. In this context, it is understood as quality actions the results of the syste
Publicado em: 2004
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11. Monitoramento e diagnÃstico de estado de disjuntores de alta e extra alta tensÃo como tÃcnica de manutenÃÃo preditiva
Concerning to the present rules applied to the energy sector in Brazil, quality of services plays an important part in determining conditions in which better results will be achieved. The Brazilian Electricity Regulatory Agency ANEEL - has imposed severe penalties to the electric companies involving large amount of money in case of equipment failures.
Publicado em: 2004
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12. Continuous assessment and improvement in quality of care. A model from the Department of Veterans Affairs Cardiac Surgery.
OBJECTIVE: The authors organized the Department of Veterans Affairs (VA) Continuous Improvement in Cardiac Surgery Study (CICSS) to provide risk-adjusted outcome data for the continuous assessment and improvement of quality of care for all patients undergoing cardiac surgery in the VA. BACKGROUND: The use of risk-adjusted outcomes to monitor quality of healt