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SF6 decomposition product multi-component dynamic gas preparation method

A dynamic gas distribution, multi-component technology, used in the analysis of gas mixtures, analytical materials, standard gas analyzers, etc., can solve problems such as electrical performance degradation, equipment accidents, and equipment operation safety hazards, and achieve high control accuracy and distribution. The effect of uniform and improving work efficiency

Inactive Publication Date: 2016-11-09
STATE GRID HEBEI ELECTRIC POWER RES INST +2
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Problems solved by technology

These products lower the SF 6 The insulation properties of the gas cause hidden dangers to the safety of equipment operation
If there is moisture in the gas, under certain conditions, it will lead to electrical performance degradation, and even cause equipment accidents; therefore, it is necessary to check the SF 6 The decomposition products and humidity of the gas are detected online in real time or periodically, so as to judge the internal operation status of the equipment

Method used

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  • SF6 decomposition product multi-component dynamic gas preparation method

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Effect test

Embodiment 1

[0029] like figure 1 As shown, the existing SF 6 A bottle of high-purity gas (99.99%), connected to 1 inlet quick-plug connector, standard sample gas 50ppmSO 2 (background gas SF 6 ), 50ppm H 2 S (background gas SF 6 ), 100 ppm CO (background gas SF 6 ) are respectively connected to 2, 3, and 4 of the inlet push-in connectors, and a standard gas with a total flow rate of 512mL needs to be configured. Among them, the dew point temperature Td= -21.8℃ is required, and SO 2 Concentration 5ppm, H 2 The S concentration is 5ppm, and the CO concentration is 10ppm. If the temperature of the water tank is 26.9°C at this time, based on the calculation of the saturated water vapor pressure at this temperature, the wet gas flow rate is 12mL and the dry gas flow rate is 500mL; at the same time, in order to achieve SF 6 Decomposition product multi-component gas distribution concentration, need SO 2 、H 2 Each of the three standard gases of S and CO is 51.2mL, and the three standard ...

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Abstract

The invention relates to an SF6 decomposition product multi-component dynamic gas preparation method. The method realizes gas mixing preparation through a mass flow mix technology, and comprises the following steps: inputting a standard sample gas and a background gas, dynamically preparing a dry background gas source and a wet background gas source, dynamically preparing dry SF6 decomposition product multi-components gas with different concentrations, and dynamically preparing SF6 decomposition product multi-component gas with different humidity values. The SF6 decomposition product multi-component dynamic gas preparation method can simulate the decomposition product concentration of onsite gas to dynamically prepare decomposition product standard mixed gas with different concentrations, verifies an SF6 decomposition product instrument, has the advantages of high convenience, fastness, and easiness in operation, and greatly improves the gas preparation working efficiency in the dynamic preparation process; and single-component and multi-component standard gases prepared in the invention are difficultly influenced by the temperature and pressure change of environment, and the practical concentration of the prepared gas is same to an ideal gas concentration, sot eh precision of the prepared gas is guaranteed.

Description

technical field [0001] The invention relates to the technical field of gas detection, in particular to a SF 6 A multi-component dynamic gas distribution method for decomposition products. Background technique [0002] SF 6 The gas has unique insulating properties and arc extinguishing capabilities, and is widely used in high-voltage electrical equipment, such as SF 6 Circuit breakers, GIS fully enclosed combination switches, etc. SF 6 High-voltage switchgear has been widely used in power systems due to its advantages of high operational reliability, small maintenance workload and long service life, and has played an important role in the safe, economical and stable operation of power systems. [0003] During the operation of the equipment, due to the influence of many factors such as arc, corona, and discharge, the SF 6 Under the action of thermoelectricity, the gas will undergo a chemical reaction to generate decomposition products such as sulfide, fluoride, and carbid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N33/00
CPCG01N1/28G01N33/0006G01N2001/2893
Inventor 刘克成马慧芳张立军王娟怡王艳
Owner STATE GRID HEBEI ELECTRIC POWER RES INST
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