Temat: napięcie elektryczne - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Experimental study of pollution and simulation on insulators using COMSOL® under AC voltage
Autorzy:: Benguesmia, Hani
Bakri, Badis
Khadar, Saad
Hamrit, Fareh
M’ziou, Nassima
Powiązania:: https://bibliotekanauki.pl/articles/327338.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:: insulator
flashover
pollution
high voltage
potential
electric field
izolator
przeskok
wysokie napięcie
pole elektryczne
potencjał
Opis:: The flashover of pollution, observed on the insulators used in high voltage transmission, is one of the most important power transmission stakes. It is a very complex problem due to several factors including the modelling difficulties of complex shapes of insulators, different pollution densities at different regions, non-homogeneous pollution distribution on the insulator surface and unknown effect of humidity on the pollution. In the literature, some static and dynamic models have been developed by making some assumptions and omissions to predict the flashover voltages of polluted insulators. This paper aims to experimentally analyse the flashover process and simulation of the distributions of the potential and the electric field under 50 Hz applied voltage on a real model simulating the 175CTV outdoor insulators largely used by the Algerian Company of Electricity and Gas (SONELGAZ). This real model is studied under non-polluted (distilled water), and polluted (distilled water and sand) environments. The simulations were carried out by using the COMSOL multiphysics software. This program uses the finite element method to solve the partial differential equations that describe the field. Experimental results made in the laboratory and simulation results are original and found to be congruent.
Źródło:: Diagnostyka; 2019, 20, 3; 21-29
1641-6414
2449-5220
Pojawia się w:: Diagnostyka
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Simulation of the potential and electric field distribution on high voltage insulator using the finite element method
Autorzy:: Benguesmia, H.
M’ziou, N.
Boubakeur, A.
Powiązania:: https://bibliotekanauki.pl/articles/329444.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:: simulation
MEF
high voltage
electrical potential
electric field
pole elektryczne
symulacja
wysokie napięcie
potencjał elektryczny
Opis:: The knowledge of the distribution of the electric field within and around high voltage equipment is a crucial aspect of the design, exploitation and performance of high voltage insulators. It could be useful for the detection of defects in insulators. The objective of this study is predicting the behavior of polluted insulator under AC voltage. For thus, the distribution of the potential and the electric field along high voltage insulator is investigated using a numerical method. The commercial Comsol Multiphysics proved to be one of the best software used in 2D modeling. The potential and the electric field distributions along this insulator are simulated under various conditions: the two cases: clean and polluted insulators and applying different conductivity values. We used electrostatic 2D simulations in the AC/DC module. The results are auspicious and promising.
Źródło:: Diagnostyka; 2018, 19, 2; 41-52
1641-6414
2449-5220
Pojawia się w:: Diagnostyka
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: The changing shape of a liquid drop in an electric field
Autorzy:: Jayalal, A. A. S. N.
Wijewardena Gamalath, K. A. I. L.
Powiązania:: https://bibliotekanauki.pl/articles/411766.pdf
Data publikacji:: 2012
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: gęstość ładunku powierzchniowego
stała dielektryczna
kąt stożka
napięcie powierzchniowe
minimalne pole elektryczne
surface charge density
dielectric constant
cone angle
surface tension
minimum electric field
Opis:: An approximate extension of the slender body theory was used to determine the static shape of a conically ended dielectric fluid drop in an electric field. Using induced surface charge density, hydrostatic pressure and the surface tension of the liquid with interfacial tension stresses and Maxwell electric stresses, a governing equation was obtained for Spender geometries for the equilibrium configuration and numerically solved for 3D. For an applied electric field, the electric energy on a spherical drop can be maximized in a weak dielectric by increasing the applied electric field. The minimum dielectric constant ratio needed to produce a conical end is 14.5 corresponding to a cone angle 31.25° .There is a sharp increment of the aspect ratio after reaching the threshold value of the applied field strength and the deformation of the fluid drop increases with the increase in dielectric constant of the fluid drop. For a particular dielectric constant ratio, the threshold electric field producing conical interface increases with the increased surface tension of the liquid. The threshold electric field for a water drop is 1.0854×104 units and the corresponding aspect ratio is 15. For the minimum dielectric ratio the cone angle of the drop decreases with applied field making the drop more stable at higher fields.
Źródło:: International Letters of Chemistry, Physics and Astronomy; 2012, 3; 24-40
2299-3843
Pojawia się w:: International Letters of Chemistry, Physics and Astronomy
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "napięcie elektryczne" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język