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Classification of lightning stroke on transmission line using multi-resolution analysis and machine learning
(Elsevier, 2014-06)
One of most important elements of Electric Power Systems (EPS) is the transmission line (TL), which is permanently under adverse conditions especially lightning strokes. At the moment, those phenomena have been the root ...
Análise técnico-econômica de alternativas convencionais e não-convencionais para melhoria de desempenho de linhas de transmissão frente a descargas atmosféricas
(Universidade Federal de Minas GeraisBrasilENG - DEPARTAMENTO DE ENGENHARIA ELÉTRICAPrograma de Pós-Graduação em Engenharia ElétricaUFMG, 2022-07-19)
Most of the unscheduled transmission lines (TLs) outages occur due to direct lightning strikes to the electrical system. These outages promote the interruption in the energy supply, resulting in losses for electric power ...
Uma proposta de representação de torres de linhas de transmissão diretamente no domínio do tempo
(Universidade Estadual Paulista (Unesp), 2018-12-04)
Este trabalho apresenta uma proposta de modelagem de torres de transmissão convencionais e gigantes diretamente no domínio do tempo cujas admitâncias dessas torres são representadas por elementos discretos de circuito. A ...
Estudo de um arranjo especial de aterramento que atenua o problema do comprimento efetivo
(Universidade Federal de Minas GeraisUFMG, 2017-01-01)
The reliability and availability of the electric power transmission system is severely influenced by lightning. In Brazil, roughly 65% of the overhead transmission lines outages are due to lightning, whereas the backflashover ...
Avaliação de metodologias para análise de desempenho de linhas de transmissão frente às descargas atmosféricas
(Universidade Federal de Minas GeraisUFMG, 2013-07-24)
The main cause of unplanned outages of transmission lines is related to the effects associated with lightning direct strikes to the line. Furthermore, the rules imposed by the agencies that regulate the electricity sector ...
Optimization of tower-footing grounding impedance for guyed-V transmission towers
(2019-12-01)
Backflashover is one of the mechanisms by which lightning strikes can cause outages/damages in power systems. In this context, the tower-footing grounding system of transmission towers has an essential role for mitigating ...
Overvoltage analysis of transmission towers considering the influence of tower-footing impedance
(2017-11-21)
Lightning is one of the main causes of outages due to backflashover mechanism in power systems. In this context, the tower-footing impedance presents a key role in the overvoltages caused by this phenomenon. Tower-footing ...
Nova metodologia para identificação de pontos críticos de desempenho em linhas de transmissão baseada na aplicação de sistemas de localização de descargas atmosféricas
(Universidade Federal de Minas GeraisUFMG, 2006-12-01)
The modern Lightning Location Systems (LLS) are the most advanced tool to provide lightning data in a wide scale range. Despite the LLS potentiality, the use of LLS data to support the design and operation activities in ...
Utilização de cabo guarda extra para melhoria de desempenho de linhas de transmissão
(Universidade Federal de Minas GeraisUFMG, 2010-07-23)
Overvoltages in transmission lines originated from lightning are objects of big concern in companies and utilities involved with transmission and distribution of electric energy. In most cases, failures in the transmission ...