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Experiment method for SF6/N2 mixed gas diffusion characteristics

A technology of mixed gas and diffusion characteristics, which is applied in the field of SF6/N2 mixed gas diffusion characteristics experiment, can solve the problems of not being able to play a good role in insulating arc extinguishing and high price

Inactive Publication Date: 2020-02-14
WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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Problems solved by technology

On the other hand, SF 6 In actual use, it is generally under high pressure (3 to 6 atmospheres), and it is easy to liquefy under high pressure (the liquefaction temperature is 0°C at 1.2MPa, and the liquefaction temperature is -40°C at working pressure), which makes SF 6 In areas with low temperature, it cannot play the role of insulation and arc extinguishing well
In addition, SF 6 The price of gas is also higher

Method used

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  • Experiment method for SF6/N2 mixed gas diffusion characteristics

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Embodiment Construction

[0016] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0017] The invention provides a SF 6 / N 2 The mixed gas diffusion characteristic experimental method comprises the following steps:

[0018] S1, for different proportions of mixed gas, pure SF 6 and pure N 2 Simulation of molecular motion under different temperature and pressure;

[0019] S2. Obtain gas condensation situation and molecular diffusion coefficient information through statistical analysis of molecular trajectory, and provide qualitative and quantitative information for the ratio selection of mixed gas and gas supplement maintenance based on gas condensation situation and molecular diffusion coefficient information.

[0020] Further, in step S1, the classical molecular dynamics calculation method is used...

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Abstract

The invention relates to an experiment method for SF6 / N2 mixed gas diffusion characteristics. The method comprises the following steps: S1, simulating molecular motions of mixed gas, pure SF6 and pureN2 in different proportions under different temperature and pressure intensities; and S2, carrying out statistic analysis on molecular motion trails to obtain gas condensation condition and moleculardiffusion coefficient information and providing qualitative and quantitative information for proportion selection and gas supplement maintenance of the mixed gas according to the gas condensation condition and the molecular diffusion coefficient information. Therefore, the diffusion characteristics of the mixed gas can be simulated and an optimal gas mixing ratio can be determined.

Description

technical field [0001] The present invention relates to a kind of SF 6 / N 2 Experimental method for the diffusion characteristics of mixed gases. Background technique [0002] SF 6 The gas has excellent insulating properties and arc extinguishing ability, stable chemical properties and non-toxic, so it is widely used as an insulating gas in high-voltage power equipment, such as circuit breakers (GCB), combined electrical appliances (GIS), transformers (GIT), cables ( GIC), etc., the working voltage includes all grades from 35kV to 1200kV. But studies have shown that SF 6 The gas has a strong greenhouse effect, and its greenhouse effect is CO 2 23,900 times that of a gas, and because of its chemical stability, its lifetime in the atmosphere can reach 3,200 years. Therefore SF 6 Use and discharge need to be cautious. On the other hand, SF 6 In actual use, it is generally under high pressure (3 to 6 atmospheres), and it is easy to liquefy under high pressure (the lique...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00
CPCG01N13/00
Inventor 史会轩刘晓波王磊
Owner WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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