Results 21 to 30 of about 1,327,278 (318)

Generalised voltage graphs [PDF]

open access: yesEuropean Journal of Combinatorics, 2021
A graph with a semiregular group of automorphisms can be thought of as the derived cover arising from a voltage graph. Since its inception, the theory of voltage graphs and their derived covers has been a powerful tool used in the study of graphs with a significant degree of symmetry.
Primoz Potocnik, Micael Toledo
openaire   +2 more sources

Ageing behaviour of a polyethylene blend: influence of chemical defects and morphology on charge transport

open access: yesHigh Voltage, 2020
The properties of novel cable insulation systems will rely critically upon the morphology of the material. Here, a blend of high and low-density polyethylene (PE) was processed in order to generate three sets of samples with different morphologies.
Somyot Tantipattarakul   +2 more
doaj   +1 more source

Transmission Line Fault Diagnosis Method Based on Improved Multiple SVM Model

open access: yesIEEE Access, 2023
The accurate diagnosis of transmission line fault types is a prerequisite for quickly removing faults and restoring power supply, as well as the key to effectively reducing user economic losses, ensuring stable operation of the power system.
Peichuan Sun   +5 more
doaj   +1 more source

Charging models for airborne suspended particles around HVDC lines

open access: yesHigh Voltage, 2021
Ground total electric field (GTEF) is a vital parameter in the field of electromagnetic environment of high voltage direct current (HVDC) lines. Some experimental works reported that airborne suspended particles can be charged in the corona ion flow of ...
Kun He   +6 more
doaj   +1 more source

On specification-based cyber-attack detection in smart grids

open access: yesEnergy Informatics, 2022
The transformation of power grids into intelligent cyber-physical systems brings numerous benefits, but also significantly increases the surface for cyber-attacks, demanding appropriate countermeasures.
Ömer Sen   +7 more
doaj   +1 more source

Research on the Effect of an Air-Blown Interrupting Gap to Reduce the Rate of Lightning Tripping

open access: yesEnergies, 2023
The air-blown interrupting gap protection method is a self-energy interrupting method based on the concept of suppressing arc building by frequency continuation.
Hao Li   +4 more
doaj   +1 more source

Voltage security evaluation based on perturbation method [PDF]

open access: yes, 2009
This is the post-print version of the final paper published in International Journal of Electrical Power & Energy Systems. The published article is available from the link below. Changes resulting from the publishing process, such as peer review, editing,
Mousavi, A, Rashidinejad, M
core   +1 more source

Study on internet of things architecture of substation online monitoring equipment [PDF]

open access: yesMATEC Web of Conferences, 2021
This paper introduces the structure of the existing on-line monitoring system, and analyzes the problems of poor compatibility and reliability of IED in different manufacturers.
Zhang Hejun   +5 more
doaj   +1 more source

Power cable stresses caused by transmission line faults in next generation VSC-MMC systems

open access: yesThe Journal of Engineering, 2019
Until today, HVDC systems based on Modular Multilevel Voltage Source Converters (VSC-MMC) have exclusively been realised with cross-linked polyethylene (XLPE) cable transmission in monopolar configuration.
Philipp Tünnerhoff   +3 more
doaj   +1 more source

Electrical Treeing of SiR and SiR/Fe3O4 Nanocomposites in High Magnetic Field

open access: yesIEEE Access, 2023
This paper investigates the effects of high magnetic field on electrical treeing of silicone rubber (SiR). Experimental results show that electrical trees are more easily to be initiated and spread further along the direction of electric field under the ...
Mingyang Wang   +4 more
doaj   +1 more source

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