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Qualitative and quantitative analysis method for sulfur hexafluoride (SF6) gas discharge decomposition product

A quantitative analysis and gas discharge technology, which is applied in the field of analysis and detection, can solve problems such as difficult accuracy and qualitative, quantitative mutual interference, high detection limit, etc., and achieve the effects of comprehensive component types, improving work efficiency, and reducing energy consumption

Active Publication Date: 2015-02-25
HAINAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0007] 2) Accurate characterization is not easy
[0008] 3) Quantitative mutual interference
[0009] 4) Insufficient detection limit
Detection of SF by infrared spectroscopy 6 Discharge decomposition products, although there is no need to separate various components, but its detection limit is higher than that of gas chromatography, and products with lower concentrations cannot be detected

Method used

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  • Qualitative and quantitative analysis method for sulfur hexafluoride (SF6) gas discharge decomposition product
  • Qualitative and quantitative analysis method for sulfur hexafluoride (SF6) gas discharge decomposition product
  • Qualitative and quantitative analysis method for sulfur hexafluoride (SF6) gas discharge decomposition product

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Embodiment Construction

[0047] Analytical SF described in this example 6 The gas chromatography-mass spectrometry method of gas discharge decomposition product comprises the following steps:

[0048] 1) Sampling. In order to avoid the adsorption of the test sample by the material of the sampling container, a sampling bag made of Tedlar material can be used to collect gas samples. When collecting, the material of the connecting pipeline should be made of polytetrafluoroethylene or stainless steel as much as possible. Before each sampling, use a vacuum pump to vacuumize the sampling bag to remove other gas impurities; the connecting pipeline can be purged and vacuumized with the gas to be measured. This embodiment uses a domestic SF 6 The sample gas after the gas has undergone partial discharge for 96 hours, and artificially added a certain amount of CF 4 、H 2 S, to verify the effectiveness of the method.

[0049] 2) The samples were detected by Shimadzu gas chromatography-mass spectrometry (GCMS...

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Abstract

The invention discloses a qualitative and quantitative analysis method for a sulfur hexafluoride (SF6) gas discharge decomposition product. The method comprises the following steps of: sampling; performing qualitative and quantitative analysis on a sample by a gas chromatograph-mass spectrograph, wherein a quadrupole rod quality detector is adopted, and a chromatographic column is a CP-Sil 5 CB capillary column. Compared with the prior art, the method can be used for detecting decomposition components comprehensively, detecting eight components including CF4, C2F6, CO2, SO2F2, SOF4, SOF2, SO2 and H2S synchronously, and performing fast recognition and accurate quantitative analysis on the compound. The detection on the SF6 decomposition product assists in an operator to know the insulating state inside electrical equipment so as to judge failure causes accurately.

Description

technical field [0001] The invention belongs to the field of analysis and detection, and specifically relates to a qualitative and quantitative analysis SF 6 A method of gas discharge decomposition products. Background technique [0002] SF 6 The gas has the characteristics of stable chemical properties, safety and non-toxicity, good insulation and arc extinguishing performance at room temperature, making it widely used in various electrical equipment as an excellent insulating medium. However, as the operating time of electrical equipment increases, various insulation failure problems will appear, which is characterized by partial discharge of the insulation medium inside the equipment before breakdown. [0003] SF 6 Under the action of partial discharge, the gas will decompose to produce low fluoride, these metastable substances and O in the equipment 2 or H 2 O further reacts to form SO 2 f 2 、SOF 4 、SOF 2 , SO 2 、H 2 S, S 2 f 10 O, HF, CF 4 and other produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02
Inventor 裘吟君陈晓琳陈林聪张薇李欣然
Owner HAINAN POWER GRID CO LTD ELECTRIC POWER RES INST
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