Results 281 to 290 of about 12,035,860 (334)
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On ground potential rise presented by small and large earth electrodes under lightning conditions
2017 IEEE AFRICON, 2017Electrode resistance is a typical measure of whether a buried electrode meets the design criteria of the electrode. In this context, IEC 62305 promulgates a value of 10 Ω as maximum value for adequate lightning protection. In this paper it is argued that, in addition to electrode resistance, lightning ground potential rise is another important ...
P. H. Pretorius
semanticscholar +2 more sources
2016 IEEE Industry Applications Society Annual Meeting, 2016
The multi-grounded shield wire transmission scheme is common within North American utilities. The ground potential rise (GPR) for this transmission scheme is important as it is to be used to develop specifications for systems and component protection.
Xiao-Dong Liang +2 more
semanticscholar +2 more sources
The multi-grounded shield wire transmission scheme is common within North American utilities. The ground potential rise (GPR) for this transmission scheme is important as it is to be used to develop specifications for systems and component protection.
Xiao-Dong Liang +2 more
semanticscholar +2 more sources
A Semicycle of Ground-Potential Rise
IEEE Transactions on Communications, 1972A brief description is presented of why the power utilities need communication during faults. Wire communication channels can supply this need when suitably protected. The maximum groundpotential rise is needed to select protective equipment. How this transient voltage is generated with its wave shape and duration is explained for a single phase-to ...
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IEEE transactions on electromagnetic compatibility (Print), 2023
The article proposes an efficient full-wave electromagnetic method to compute the value of the ground potential rise for a grounding system exposed to the first and subsequent lightning strokes. The grounding system consists of a grid of several vertical
Mohamad Reza Alemi +2 more
semanticscholar +1 more source
The article proposes an efficient full-wave electromagnetic method to compute the value of the ground potential rise for a grounding system exposed to the first and subsequent lightning strokes. The grounding system consists of a grid of several vertical
Mohamad Reza Alemi +2 more
semanticscholar +1 more source
EPE, 2019
Power-plants are sometimes built on massive bedrock with high soil resistivity thereby often resulting in less favorable grounding conditions. While grounding for applications with power system frequency can be achieved with large electrode areas ...
M. Lehtonen, M. Pichler, R. Schurhuber
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Power-plants are sometimes built on massive bedrock with high soil resistivity thereby often resulting in less favorable grounding conditions. While grounding for applications with power system frequency can be achieved with large electrode areas ...
M. Lehtonen, M. Pichler, R. Schurhuber
semanticscholar +1 more source
Ground potential rise calculation applied to a multiconductor network of a railway system
International Symposium on Electromagnetic Compatibility - EMC EUROPE, 2012A calculation method illustrated by practical example to estimate the effect of a Ground Potential Rise (GPR) occurring in the vicinity of a multiconductor network of railway system is presented and discussed. This program takes into account the simultaneous effects of conductive and inductive coupling of a GPR on the electrical scheme of the ...
N. Haddad, Michel Cucchiaro
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Transient Ground Potential Rise in Gas Insulated Substations - Assessment of Shock Hazard
IEEE Transactions on Power Apparatus and Systems, 1982Breakdowns and disconnect switch operations in gas insulated switchgear (GIS) generate short duration high potentials on the grounded GIS enclosures. These high potentials cause breakdowns between the GIS enclosures and other nearby grounded components, and have resulted in low voltage protection and control wiring failures and personnel shocks.
G. Ford, L. A. Geddes
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Potential Rise Characteristics of a Grounding Grid Subjected to Lightning Currents
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, 2016This paper presents the results of an investigation into the factors that affect the impulse response of a grounding grid under the passage of lightning currents. We carried out simulations of potential rise of a 10m×10m square grounding grid comprising 4 meshes buried in the soil of about 140Ω․m resistivity.
Jong-Hyuk Choi, Jae-Suk Lee
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2019 11th Asia-Pacific International Conference on Lightning (APL), 2019
Gas insulated metal enclosed switchgear and controlgear is a high-voltage electrical equipment widely used in power systems. To ensure the reliability of its operation, GIS equipment needs to be subjected to lightning impulse test at the factory ...
Tong Zhang +5 more
semanticscholar +1 more source
Gas insulated metal enclosed switchgear and controlgear is a high-voltage electrical equipment widely used in power systems. To ensure the reliability of its operation, GIS equipment needs to be subjected to lightning impulse test at the factory ...
Tong Zhang +5 more
semanticscholar +1 more source
Study of the Spread of Potential Rise Between Two Grounding Electrodes
IEEE Transactions on Industry Applications, 2015The groundings of the power distribution, signaling, and power systems of a railway system are individually performed to realize fail safe, and the groundings are often installed in close proximity. Thus, when a grounding electrode is invaded by a lightning current, its ground potential rises together with the potential of the adjacent grounding ...
Kazuo Yamamoto +2 more
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