Results 11 to 20 of about 739,942 (249)

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

Optimization of reactive power in distribution networks with DG based on improved particle swarm algorithm [PDF]

open access: yesE3S Web of Conferences
The integration of Distributed Generation (DG) into the distribution network can effectively alleviate the problems of energy shortage and air pollution, but the DG output has the characteristics of uncertainty and randomness, and the integration will ...
Xu Shanshan   +4 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

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

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

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.
Potočnik, Primož, Toledo, Micael
openaire   +2 more sources

Heat‐pump performance: voltage dip/sag, under‐voltage and over‐voltage

open access: yesThe Journal of Engineering, 2014
Reverse cycle air‐source heat‐pumps are an increasingly significant load in New Zealand and in many other countries. This has raised concern over the impact wide‐spread use of heat‐pumps may have on the grid. The characteristics of the loads connected to the power system are changing because of heat‐pumps.
William J.B. Heffernan   +2 more
openaire   +2 more sources

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

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

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