Study of switching behaviour of g3 based gas mixtures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F26%3A0198030" target="_blank" >RIV/00216305:26220/26:0198030 - isvavai.cz</a>

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.1088/1361-6463/adb858" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6463/adb858</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6463/adb858" target="_blank" >10.1088/1361-6463/adb858</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Study of switching behaviour of g3 based gas mixtures

Popis výsledku v původním jazyce

Ten years after its invention, g(3)- the mixture of C4F7N, CO2 and O-2- remains the most promising candidate for the substitution of SF6 as an insulating and switching gas. The extension and optimization of g(3) applications at a high-voltage level, especially in circuit breakers, requires knowledge of the properties and dynamics of arc discharges in this gas. The features of the arc plasma can be obtained from appropriate magneto-hydrodynamic simulations. To predict the arc behaviour, a consistent set of thermo-physical and radiation properties is necessary. The corresponding database is calculated for the case of local thermodynamic equilibrium and covers the temperature range 250-40 000 K, the pressure range 0.01-150 bar and various contents of C4F7N, O-2 and Teflon (nozzle material). This contribution presents examples of plasma composition, thermo-physical and radiation properties for g(3) mixtures. The feasibility of the new database is demonstrated on an example of simulation results for a g(3)-filled high-voltage circuit breaker. Predicted arc voltage and pressure build-up in selected volumes are compared with available experimental data. Furthermore, to explore the differences in switching behaviour between g(3) and SF6, simulations for these two gases at the same operation conditions were performed. The space- and time-dependent temperature and pressure profiles are presented and discussed.

Název v anglickém jazyce

Study of switching behaviour of g3 based gas mixtures

Popis výsledku anglicky

Ten years after its invention, g(3)- the mixture of C4F7N, CO2 and O-2- remains the most promising candidate for the substitution of SF6 as an insulating and switching gas. The extension and optimization of g(3) applications at a high-voltage level, especially in circuit breakers, requires knowledge of the properties and dynamics of arc discharges in this gas. The features of the arc plasma can be obtained from appropriate magneto-hydrodynamic simulations. To predict the arc behaviour, a consistent set of thermo-physical and radiation properties is necessary. The corresponding database is calculated for the case of local thermodynamic equilibrium and covers the temperature range 250-40 000 K, the pressure range 0.01-150 bar and various contents of C4F7N, O-2 and Teflon (nozzle material). This contribution presents examples of plasma composition, thermo-physical and radiation properties for g(3) mixtures. The feasibility of the new database is demonstrated on an example of simulation results for a g(3)-filled high-voltage circuit breaker. Predicted arc voltage and pressure build-up in selected volumes are compared with available experimental data. Furthermore, to explore the differences in switching behaviour between g(3) and SF6, simulations for these two gases at the same operation conditions were performed. The space- and time-dependent temperature and pressure profiles are presented and discussed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

JOURNAL OF PHYSICS D-APPLIED PHYSICS

ISSN

0022-3727

e-ISSN

1361-6463

Svazek periodika

58

Číslo periodika v rámci svazku

15

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

17

Strana od-do

1-17

Kód UT WoS článku

001439078200001

EID výsledku v databázi Scopus

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