Results 21 to 30 of about 18,108,349 (299)

Lightning Performance and Economic Analysis of an Overhead 88 kV Power Delivery Network with Enhanced Protective Systems

open access: yesEnergies, 2020
Earthing and protective devices such as line surge arrestors (LSAs) play an important role in areas with high lightning occurrence for overhead HVAC lines’ performance.
Eddie Singh   +2 more
doaj   +1 more source

Statistical Analysis of Lightning Flashes over Wind Parks in Greece

open access: yesEnergies, 2021
Currently, lightning phenomenon, mechanisms, and impacts on lives and infrastructures have been satisfactorily decoded and studied. Sound knowledge of lightning parameters is available in international literature.
Vasilios P. Androvitsaneas   +3 more
doaj   +1 more source

Impact of climatic variations on seasonal changes of earthing resistance [PDF]

open access: yesE3S Web of Conferences
Seasonal soil-moisture flux causes time-varying soil resistivity and earthing resistance, which can compromise the safety of power-system earthing installations. Using representative sites in South Africa and Nigeria under comparable climates, this paper
Onyedikachi Samuel Nnamdi   +1 more
doaj   +1 more source

Optimal Design of the Vertical Earthing with Electrodes Arranged in Line

open access: yesApplied Sciences, 2020
The design methods of earthing from standards recommend the choice of electrode lengths and propose that the distances between electrodes to be 1−3 times larger than their length.
Sorin Gheorghe Pavel   +4 more
doaj   +1 more source

Improved transient earth fault clearing on solid and resistance earthed MV netwworks [PDF]

open access: yes, 2011
Includes bibliographical references.The aim of this thesis is to endeavour to develop, through a literature study, a method or methods whereby transient earth faults on neutral earthed MV networks may be cleared without customer supply interruptions ...
Scholtz, J P
core   +1 more source

Monitoring, Detection and Locating of Transient Earth Fault Using Zero-Sequence Current and Cable Screen Earthing Current in Medium Voltage Cable and Mixed Feeders

open access: yesEnergies, 2022
This paper presents the final development of an expert system utilizing a measurement of cable screen earthing transient current. The developed system allows for identification and location of earth fault in underground cable and mixed lines (underground
Krzysztof Łowczowski, Bartosz Olejnik
doaj   +1 more source

Frequency Domain Analysis of a Wind Turbine Generator Earthing System for Lightning Discharge Currents

open access: yesIEEE 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
doaj   +1 more source

Detection and Location of Earth Fault in MV Feeders Using Screen Earthing Current Measurements

open access: yesEnergies, 2020
The paper analyzes the utilization of cable screen currents for earth fault identification and location. Attention is paid on cable and mixed feeders—cable and overhead lines. The principle of operation is based on utilization of 3 criterion values:
Krzysztof Lowczowski   +3 more
doaj   +1 more source

Performance of active electrical earthing systems: background and methodology

open access: yes, 2023
An effective earthing system with new earth resistance reducing agents (ERRA) and purpose-made electrode configuration has been discussed as Active Electrical Earthing System (AEES).
Afiq, M.   +3 more
core   +1 more source

The Earth System: An Introduction to Earth Systems Science [PDF]

open access: yesEos, Transactions American Geophysical Union, 1999
The atmosphere, hydrosphere, biosphere, and solid Earth are the basic components of the Earth system. These different components are not separate entities; instead they interact over a broad range of spatial and temporal scales. Determining how various internal and external influences impact each component of the Earth system individually is ...
openaire   +1 more source

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