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Analysis of the Dielectric Behavior of Distribution Insulators Under Non-Standard Lightning Impulses Voltages
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2011)
Overhead distribution lines are often exposed to lightning overvoltages, whose waveforms vary widely and can differ substantially from the standard impulse voltage waveform (1,2 - 50). Different models have been proposed ...
The use of the impulse impedance as a concise representation of grounding electrodes in lightning protection applications
(Universidade Federal de Minas GeraisBrasilENG - DEPARTAMENTO DE ENGENHARIA ELÉTRICAUFMG, 2018-10-05)
A physical approach of the test voltage function for evaluation of the impulse parameters in lightning impulse voltages with superimposed oscillations and overshoots
(Institute of Electrical and Electronics Engineers, 2016-10)
The introduction of the test voltage function or k-factor in IEC 60060-1 Ed. 3 has been an important step to ensure reproducibility and traceability in high voltage tests techniques for lightning impulses with superposed ...
Modelagem matemática e simulação de transformadores de potência para ensaios de impulsos atmosféricos
(Universidade Federal de Santa MariaBrasilUFSMCentro de Tecnologia, 2013-02-22)
This study presents the transient response analysis of power transformers during high frequency lightning impulse applied directly or near of its terminals. In addition, a study of the internal distribution of overvoltages ...
Uma abordagem para atestar a suportabilidade dielétrica a formas de onda não padronizadas nos ensaios de equipamentos de alta tensão
(Universidade Federal de Santa MariaBrasilEngenharia ElétricaUFSMPrograma de Pós-Graduação em Engenharia ElétricaCentro de Tecnologia, 2021-08-31)
The non-standard waveforms caused by high frequency transients pose a challenge when it comes to their representation in testing high-voltage equipment. Such a challenge is worrisome for electric power utilities and ...
Sistemas para dedição de correntes de descargas atmosféricas: desenvolvimentos e resultados preliminares
(Universidade Federal de Minas GeraisUFMG, 2010-08-16)
The return current is the main source of the lightning effects and of electromagnetic disturbance caused by such event. In the past, this was the main reason to justify the investigation of this current and related parameters. ...
Design and construction of a Reduced Scale Model to Measure Lightning Induced Voltages over an Inclined Terrain
(Universidad Nacional de Colombia (Sede Medellín). Facultad de Minas., 2015-07-01)
In this paper is presented the design and construction of a reduce scale model indented to be used for measuring Lightning induced voltages on overhead lines placed over an inclined terrain. Here we present technical details ...
Analysis and development of a personal portable lightning protection system
(Universidad Nacional de ColombiaBogotá - Ingeniería - Doctorado en Ingeniería - Ingeniería EléctricaFacultad de IngenieríaBogotá, ColombiaUniversidad Nacional de Colombia - Sede Bogotá, 2023-05-19)
Colombia has a very high lightning activity as shown in different published lightning maps.
Any activity that takes place outdoors in stormy weather, even more in places recognized
as having high lightning activity, at ...
Avaliação da suportabilidade de estruturas monofásicas de redes de distribuição aéreas compactas frente a impulsos atmosféricos normalizados
(Universidade Federal de Minas GeraisUFMG, 2015-10-05)
This work is dedicated to investigate the impulse withstand voltage of single-phase compact distribution line structures when subjected to standard lightning impulse waveforms with positive and negative polarities. It is ...
Space charge and soil ionization: An electro-kinetic approach
(Institute of Electrical and Electronics Engineers, 2011-12)
This paper proposes an electro-kinetic model of soil ionization for concentrated electrodes submitted to impulse currents. This approach allows a better understanding of the dynamic response of earth rods. Since current ...