Results 1 to 10 of about 9,005,604 (298)

Soil Treatment to Reduce Grounding Resistance by Applying Low-Resistivity Material (LRM) Implemented in Different Grounding Systems Configurations and in Soils with Different Resistivities

open access: yesApplied Sciences, 2022
In the present study, field tests were performed using low-resistivity materials (LRMs) in different grounding system (GS) configurations to reduce the grounding resistance (GR) and assess the variation in the effectiveness of the LRMs with increases in ...
Freddy Sinchi-Sinchi   +3 more
doaj   +3 more sources

Overview of Transient Simulations of Grounding Systems under Surge Conditions

open access: yesEnergies, 2022
The present paper gives an overview of modelling methods of standard grounding systems under surge conditions, using the non-uniform transmission line approach.
Tomasz Kisielewicz, Milton Cuenca
doaj   +3 more sources

Performance of Practical Grounding Systems under High Impulse Conditions

open access: yesEnergies, 2018
This paper investigates the factors affecting the impulse characteristics of purposely built grounding systems. We installed 2 m × 2 m grounding systems in four different sites with different soil resistivity values.
Muhd Shahirad Reffin   +3 more
doaj   +3 more sources

Seasonal Influences on the Impulse Characteristics of Grounding Systems for Tropical Countries

open access: yesEnergies, 2019
One of the most important parameters of the performance of grounding systems is the soil resistivity. As generally known, the soil resistivity changes seasonally, hence the performance of grounding systems, at DC and under high impulse conditions.
Muhd Shahirad Reffin   +6 more
doaj   +3 more sources

Evaluation of high-voltage AC cable grounding systems based on the real-time monitoring and theoretical calculation of grounding currents

open access: yesHigh Voltage, 2018
For high-voltage (HV) AC cable transmission systems, the metal sheaths of three separate single-core cables are cross-bonded at each end of the cable section, to suppress the induced voltages in sheaths.
Zhonglei Li, Boxue Du, Boxue Du, Wang Li
doaj   +3 more sources

Grounding-zone wedges on the northern Larsen shelf, Antarctic Peninsula [PDF]

open access: yes, 2015
Prominent quasi-linear or lobate wedge-shaped depositional sedimentary landforms, termed grounding-zone wedges (GZWs), are distributed widely on polar continental shelves.
Jeffrey Evans (1254507)   +1 more
core   +6 more sources

Transient impedance of grounding system with impulse superimposed sinewave

open access: yesENP Engineering Science Journal, 2021
Investigating the transient performance of grounding systems subject to lightning (impulse or impulse superimposed sinewave) is valuable for protecting the power system and maintaining the system operation.
Sherif Ghoneim   +2 more
doaj   +1 more source

Application of hybrid boundary element method: Example of semishperical ground inhomogeneity [PDF]

open access: yesSerbian Journal of Electrical Engineering, 2014
One new, so-called hybrid boundary element method (HBEM) is presented in this paper. It is a recently proposed numerical method for stationary and quasi-stationary EM field analysis.
Cvetković Nenad N.   +4 more
doaj   +1 more source

Effect of Impulse Polarity on a New Grounding Device with Spike Rods (GDSR)

open access: yesEnergies, 2020
The characterizations of grounding systems subjected to high impulse conditions are known to be dependent on the polarity, current to peak time and discharge time, as well as the electrical properties of the soil, and the grounding electrodes themselves.
Abdul Wali Abdul Ali   +2 more
doaj   +1 more source

Assessment of the Feasibility of Applying the Electromagnetic Time Reversal Theory to Locate Defects in Grounding Electrodes

open access: yesEnergies, 2023
In recent years, the electromagnetic time reversal (EMTR) theory has been successfully applied for locating various sources of disturbances, such as short-circuit faults, in power systems.
Rafael Alipio   +4 more
doaj   +1 more source

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