A5046656408- High voltage insulation and dielectric phenomena
- Power Transformer Diagnostics and Insulation
- Inorganic Fluorides and Related Compounds
- Plasma Diagnostics and Applications
- Vacuum and Plasma Arcs
- Spacecraft and Cryogenic Technologies
- Plasma Applications and Diagnostics
- Quantum, superfluid, helium dynamics
- Water Quality Monitoring and Analysis
- Maritime Transport Emissions and Efficiency
- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- Advanced Chemical Sensor Technologies
- Methane Hydrates and Related Phenomena
- Fault Detection and Control Systems
Xi'an Jiaotong University
2022-2024
State Key Laboratory of Electrical Insulation and Power Equipment
2022-2024
China Southern Power Grid (China)
2024
Abstract The perfluoronitrile C 4 F 7 N is considered a promising SF 6 -alternative in high-voltage gas-insulated apparatus, thanks to its high dielectric strength and low global warming potential. However, complete consistent set of electron-neutral collision cross-sections still lacking, which hinders relevant plasma modeling. In this contribution, the available are first compiled assessed. initial adjusted iteratively by electron swarm method determine self-consistent cross-section for...
Recently, C4F7N mixtures have attracted attention as a promising SF6 alternative due to their low global warming potential and excellent electrical performance. In this study, we introduce newly built experimental setup for pulsed Townsend measurements well the physical model acquisition of electron swarm parameters. The effective ionization rate coefficients, drift velocity, density-normalized longitudinal diffusion coefficients in its with CO2 N2 were obtained. reduced critical electric...
HFO-1336mzz(E) is considered a potential eco-friendly insulating gas, with low global warming and high dielectric strength. This study investigates the insulation properties of its mixtures CO2 or dry air to evaluate their feasibility as alternatives sulfur hexafluoride (SF6) for medium-voltage switchgears. The physicochemical were first introduced saturated vapor pressure characteristics analyzed determine optimal mixing ratio meet minimum operating temperature requirement applications....
Abstract In this work, a convenient and efficient method is proposed to determine swarm parameters considering ion kinetics from pulsed Townsend (PT) measurements. First, physical model was presented describe the development of PT discharge electron detachment conversion reactions. A numerical solution also proposed. order assess precision our calculations, we calculated electronic ionic transients derived for different cases. Then, genetic algorithm (GA) find set parameters, under which...
The gas mixture CO2–O2 has been considered as an insulation and arc-quenching medium in gas-insulated switchgears. In this paper, the dielectric breakdown properties of mixtures at different O2 concentrations pressures were studied theoretically by considering ion kinetics a spatial–temporal growth avalanche model. A kinetic scheme that includes all main reactions likely to occur is presented. An improved method calculate strength developed, based on model considers both spatial temporal...
ABSTRACT. With the energy sector having a greater carbon impact than every other industry combined, urgent need for decarbonization to combat climate change cannot be overstated. Sulfur hexafluoride (SF6), as arc extinguishing and insulating medium, is broadly applied in power equipment. While it very essential find an environmentally friendly substitute gas SF6 due its strong greenhouse effect. Efforts are underway bring Zero closer. Although there many potential alternatives, most have...
Abstract Sulfur hexafluoride (SF 6 ), as an arc extinguishing and insulating medium, is broadly applied in power equipment; however, it essential to find environmentally friendly substitute gas for SF due its strong greenhouse effect. Although there are many potential alternatives, most have relatively high boiling points that cannot meet the minimum operating temperature of equipment. In past, liquefaction mixture was reduced by mixing with buffer gases, such CO 2 , N or dry air. However,...
Sulfur hexafluoride <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$(\mathbf{SF}_{6})$</tex> gas is widely used in electric power equipment because of its good insulation and arc extinguishing properties. However, SF <inf xmlns:xlink="http://www.w3.org/1999/xlink">6</inf> a greenhouse gas. Therefore, it urgent to explore environmentally-friendly alternatives . In recent years, various new environmental-friendly gases mixed have gained attention...
Nitrogen is an environmentally friendly insulating medium gas most commonly used in medium-voltage (MV) switchgear. In this paper, the effect of humidity <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">on</sup> property nitrogen switchgears, namely, a small amount water impurities mixed N2 on dielectric breakdown characteristics mixtures for temperature range from 300 K to 4000 at pressure 0.1 MPa analyzed. First all, based Gibbs minimum free...