Power Interruptions
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Cascade Modeling of the Measuring System Used to Assess S-Parameters of Anchor Rods on Power Transmission Lines Guyed Towers
Abstract The structural condition of the cable-stayed towers anchorage on power transmission lines requires constant monitoring. Maintenance routines must be able to identify faulty anchor rods and substitute them to avoid tower collapses and power delivery interruptions. Modern statistical diagnostic systems based on machine learning requires the generation
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. CLASSIFICATION OF POWER QUALITY CONSIDERING VOLTAGE SAGS IN DISTRIBUTION SYSTEMS USING KDD PROCESS
In this paper, we propose a methodology to classify Power Quality (PQ) in distribution systems based on voltage sags. The methodology uses the KDD process (Knowledge Discovery in Databases) in order to establish a quality level to be printed in labels. The methodology was applied to feeders on a substation located in Curitiba, Paraná, Brazil, considering at
Pesqui. Oper.. Publicado em: 2015-08
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3. O modelo SLIM (\"Self-Consistently Interception Model\") para estimativa da incidência de descargas atmosféricas em estruturas - avaliação e aplicação na análise do desempenho de linhas de transmissão de energia / The Self-consistently Interception Model (SLIM) for estimating the lightning incidence to structures evaluation of the model and application to the analysis of lightning performance of power transmission lines
O desempenho de uma linha de transmissão de energia está diretamente ligado ao número médio anual de descargas que nela incidem, o qual depende da densidade média de descargas ao solo na região e também do grau de exposição da linha. Modelos com diferentes graus de complexidade são encontrados na literatura para a estimativa da área de atração d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/04/2012
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4. Desempenho de Linhas de Distribuição frente a Descargas Atmosféricas:: estudo e Implementação do Guia IEEE Std 1410
Lightning is one of the most important sources of disturbances in distribution systems that can cause permanent or momentary interruptions. The growing concern regarding power quality has created great interest in the interaction of lightning with power systems and an improved protection against its effects on distribution lines. Studies indicate that, in Br
Publicado em: 2009
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5. ELECTRIC DISTRIBUTION POWER SYSTEMS RELIABILITY OPTIMIZATION: An Approach Considering the Selection and Allocation of Protection and Switching Devices / OTIMIZAÇÃO DA CONFIABILIDADE DE SISTEMAS DE DISTRIBUIÇÃO DE ENERGIA ELÉTRICA: Uma Abordagem Considerando a Seleção e Alocação de Dispositivos de Proteção e Manobras
One of the main goals of the electric utilities is to provide energy to its customers in a reliable and low cost way. Traditionally, the electricity sector regulatory commissions impose continuity targets, which must be carried out, to avoid great penalties. For many years, the electric utilities have adopted the practice of allowing the increment of tempora
Publicado em: 2009
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6. Pre-corrective maintenance of power transformers: a new maintenance concept / Manutenção pré-corretiva em transformadores de potência: um novo conceito de manutenção
An important competitive edge of electric power distribution companies is their electric assets utilization management. Among them stands outs the power transformers because of its strategic importance in the energy supply to high demand areas. To minimize operational and social impacts associated to the electric energy supply interruptions these equipments
Publicado em: 2009
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7. Single-line-to-earth fault limitation through the setting of Petersen coil in power transformer neutral / Limitação de correntes de falta fase-terra por meio do ajuste de bobina de petersen em neutro de transformadores de potência
The Petersen coil insertion on the neutral of the electrical distribution power system transformers has been a technical strategy adopted for several electrical utilities, in many countries with the purpose to reduce the earth-fault current intensities, enabling circuit disconnect decrease for intermittent faults and so to improve the electrical power qualit
Publicado em: 2009
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8. Contribution to the surge arresters´ evaluation methodology of electrical transmission system. / Contribuição à metodologia de avaliação dos pára-raios do sistema de transmissão de energia elétrica
Power systems are subject to many types of overvoltages that may provoke interruptions or damage in electrical equipments, compromising the continuity of electrical energy supply to consumers and impacting negatively the power quality indices. One of the most important device used to protect the electric equipments are the surge arresters, which may be class
Publicado em: 2009
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9. Automação como recurso de planejamento de redes de distribuição de energia elétrica. / Automation as resource for distribution systems planning.
Concerning the components of an electrical distribution network and their susceptibility to functional failures or need for maintenance actions, planning and project criteria should be adopted to assure continuity of energy supply even though some components may be out of work. Traditionally the power systems, especially in power transmission and distributio
Publicado em: 2008
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10. ALGORITMOS HEURÍSTICOS DE OTIMIZAÇÃO DA PROTEÇÃO E MANOBRA EM REDES DE DISTRIBUIÇÃO DE ENERGIA / RELIABILITY HEURISTIC ALGORITHMS FOR PROTECTION AND MANEUVERING DEVICES DISTRIBUTION NETWORKS
The new regulations of the electricity sector have requested from the power utilities great performance efficiency on their distribution systems, requiring more rigorous quality and continuity energy levels. In Brazil, the privatization of the power utility companies has been allowing the adoption of new planning and operation policies, that necessarily cons
Publicado em: 2008
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11. Ocupação ambiental e características populacionais de curicacas Theristicus caudatus em linhas de transmissão de alta tensão / Ocupação ambiental e características populacionais de curicacas Theristicus caudatus em linhas de transmissão de alta tensão
The Buff-necked Ibis (Theristicus caudatus) is a bird typical of South Americas open landscapes. In Brazil, it occurs throughout the country and is usually associated with dry habitats. From August 2005 to December 2007, Buff-necked Ibises were monitored along electrical transmission lines and towers in the Federal District and in the States of Goiás and Mi
Publicado em: 2008
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12. Avaliação de custos decorrentes de descargas atmosféricas em sistemas de distribuição de energia / Evaluation of the costs arising from atmospheric discharges in power distribution systems.
As descargas atmosféricas sempre foram tratadas como acontecimentos fortuitos e de força maior, inerentes à vontade do homem. Contudo, mudanças significativas a esse respeito ocorreram recentemente na legislação brasileira, no Código Civil e na norma ABNT NBR 5410: 2004 (Instalações Elétricas de Baixa Tensão). Além disso, em 29 de abril de 2004 f
Publicado em: 2007