Results 11 to 20 of about 12,035,860 (334)
Ground State for the Schrödinger Operator with the Weighted Hardy Potential [PDF]
International Journal of Differential Equations, 2011 We establish the existence of ground states on ℝ𝑁 for the Laplace operator involving the Hardy-type potential. This gives rise to the existence of the principal eigenfunctions for the Laplace operator involving weighted Hardy potentials. We also obtain a
J. Chabrowski, K. Tintarev
doaj +2 more sources
Electric power systems research, 2019 Wind turbines are very vulnerable to lightning strikes due to their height, sharp edges and remote locations often with high soil resistivity. In this paper we present numerical simulations of the impedance of a typical wind turbine grounding geometry ...
A. Šunjerga +4 more
semanticscholar +5 more sources
Step and Touch Voltages and Grounding Potential Rise (IEEE and IEC)
, 2018 This chapter contains safety criteria according to IEEE Standards, step and touch voltage criteria, reduction factor, simplified equations for mesh and step voltage, application of step and mesh potential in safe earthing system design, safety criteria, IEC 479-1 STD, permissible touch and step voltage according to IEC 479-1, Optimum Compression Ratio (
openaire +2 more sources
Tecnología en Marcha, 2021 De modo a viabilizar a modelagem de sistemas de aterramento em estudos sistêmicos e de cálculo de transitórios e aumentar a exatidão e confiabilidade dos modelos utilizados, circuitos equivalentes devem ser estudados de modo a possibilitar a ...
Arthur Francisco Andrade +3 more
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Study of Atmospheric Discharge Effects in Distribution Networks with a Novel Residential Buildings Protection Approach [PDF]
Advances in Engineering and Intelligence Systems, 2023 Lightning-induced overvoltage poses a significant threat to electrical equipment and building structures. This study aims to comprehensively investigate lightning overvoltage in low voltage distribution lines under different scenarios, including ...
Meisam Karami, Yazdan Ashgevari
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IET Generation, Transmission & Distribution, 2023 The impulse grounding impedance of tower grounding device is one of the important factors in the lightning protection evaluation of transmission line. The impulse characteristic test of the actual tower grounding device under lightning was rarely carried
Yi Zhang +7 more
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南方能源建设, 2022 [Introduction] Massive usage of gas-insulated metal-enclosed switchgear (GIS) has caused serious electromagnetic interference, especially when the isolating switch in GIS is operated with small capacitive current, it does not have arc extinguishing ...
LI Jiahui
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IEEE Access, 2019 A safe and cost-effective design of a wind turbine generator (WTG) grounding system requires accurate modeling of local soil resistivity, particularly when wind turbines are spatially distributed across a wide area with different soil types and features.
Raghavender D. Goud +3 more
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Site-Specific Response Analysis (SSRA) and pairs of ground- motions time-history generation of a site in Jakarta [PDF]
E3S Web of Conferences, 2020 The purpose of earthquake resistance design of building is to produce a structures that can withstand a certain level of a ground shaking without excessive damage.
I Wayan Sengara, Det Komerdevi
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IET Science, Measurement & Technology, 2021 Due to the impedance characteristic of conductor, the ground potential rise is different within grounding grid when impulse current is injected. When staff touches objects with different GPR at the same time, the GPD will be applied to human body ...
Chun Li +5 more
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