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Analysis and Mitigation of Ground Grid Lightning Potential Rise
Transactions on Electrical and Electronic Materials, 2020Grid design depends mainly on bringing grounding resistance, mesh voltage, and step voltage below tolerable limits when subjected to any ground fault. But, it should be noticed that the grid performance has to be tested when subjected to lightning stroke. The performance of the grid under impulse current differs than that of under power–frequency fault.
Ahmed Taher +3 more
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Ground Potential Rise in Wind Farms due to Direct Lightning
Electric Power Systems Research, 2021Abstract This paper investigates the ground potential rise (GPR) developed in wind farms subject to direct lightning currents representative of first and subsequent negative downward strokes and return strokes associated with upward negative flashes.
Rafael Alipio +4 more
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The Impact of Multilayer Ground and Buried Conductors on Ground Potential Rising
Civil-Comp Proceedings, 2016The electromagnetic modelling of phase-to-ground short-circuits in a railway environment is essential to optimize the protections against ground potential rising. Two particularly important points are defined: a) the determination of the ground structure in terms of its electric resistivity; b) the introduction in the model of a buried conductor in the
Papaiz Garbini, Gabriel +4 more
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Maximum Limit of Allowable Ground Potential Rise of Substation Grounding System
IEEE Transactions on Industry Applications, 2015Substation grounding systems should guarantee the safety of equipment and human beings. This paper discusses the maximum ground potential rise (GPR) of substation grounding systems resulting from short-circuit ground faults, the potential difference on the insulations of secondary cables and devices, and the relationship between the potential ...
Jinliang He, Bo Zhang, Rong Zeng
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A Practical Ground Potential Rise Prediction Technique for Power Stations
IEEE Transactions on Power Apparatus and Systems, 1980The determination of fault-produced Ground Potential Rise (GPR) at a power station has historically posed a number of practical and technical problems. This paper presents a GPR prediction technique which overcomes these problems without requiring a staged fault test.
F. Zupa, J. Laidig
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Distribution of Potential Rise as a Function of Shape of Grounding Electrodes
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, 2007In order to analyze the potential rise of grounding systems installed in buildings, a hemispherical grounding simulation system was studied. Potential rise was measured and analyzed regarding the shape and distance of the grounding electrodes by using this system.
Hyoung-Jun Gil +2 more
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Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, 2011
The most important object of grounding systems is to protect human being from electric shock. Touch and step voltages are measured to evaluate the performances of grounding systems. Dangerous voltages have been largely studied by the power frequency fault currents, on the other hand, the ground current containing the high frequency components and surge
Jong-Hyuk Choi +2 more
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The most important object of grounding systems is to protect human being from electric shock. Touch and step voltages are measured to evaluate the performances of grounding systems. Dangerous voltages have been largely studied by the power frequency fault currents, on the other hand, the ground current containing the high frequency components and surge
Jong-Hyuk Choi +2 more
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Transient Ground Potential Rise in Gas Insulated Substations - Experimental Studies
IEEE Transactions on Power Apparatus and Systems, 1982The very rapid dielectric breakdown of SF6 (eg, during the operation of disconnect switches in gas-insulated substations) generates steep-fronted travelling waves which couple to the exterior enclosure surface at the air/SF6 bushings and cause transient ground potential rise.
N. Fujimoto +3 more
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Research on 220kV GIS enclosure circulation and temporary ground potential rise
IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society, 2017Enclosure circulation of Gas Insulated Switchgear (GIS) and Very Fast Transient Overvoltage (VFTO) are harmful to many respects of power system, including system's security, stability and economic. The effective inhibition of GIS enclosure circulation and VFTO has attracted wide attention.
Xinghua Liu +9 more
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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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