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Method for analyzing decomposition products of SF6 in electrical device

A technology of decomposition products and electrical equipment, applied in the field of analysis and detection, to achieve the effect of effectively judging electrical equipment failures and accurate analysis

Active Publication Date: 2013-06-19
广东科立恩环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can effectively solve the problem that existing technical means cannot accurately analyze SF 6 Middle decomposition product SO 2 f 2 problem, so as to accurately judge the SF 6 Internal operation of gas-insulated equipment to ensure safe operation of electrical equipment

Method used

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  • Method for analyzing decomposition products of SF6 in electrical device
  • Method for analyzing decomposition products of SF6 in electrical device
  • Method for analyzing decomposition products of SF6 in electrical device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Analysis of SF in electrical equipment described in this example 6 A method for decomposing a product, comprising the steps of:

[0025](1) Sampling: The technical schemes of the on-site sampling part are the same as those of the existing technology. The sulfur hexafluoride sample collected from the storage tank must be representative, and the sample should be taken from liquid sulfur hexafluoride. In the absence of liquid sulfur hexafluoride, the samples taken are only representative of gaseous sulfur hexafluoride. Before sampling from the storage tank, all connection parts between the storage tank and the analytical equipment or the sulfur hexafluoride gas sampling cylinder should be evacuated by a vacuum pump. If the sampling port is connected to the main gas chamber of the storage tank using a long, narrow tube, the tube connection should be purged with the gas in the storage tank to ensure that the sulfur hexafluoride gas sample collected from the storage tank has...

Embodiment 2

[0038] Analysis of SF in electrical equipment described in this example 6 The method for decomposing the product, the steps are basically the same as in Example 1, except that the analysis and detection parameters are specifically: He gas as the carrier gas; the initial temperature of the column oven is 80°C, the final temperature is 200°C, and the heating rate is 20°C / min. See below. in, Figure 7 It is the result of independent TCD detector analysis of the same sample as the present embodiment in the prior art, and the three impurity peaks in the figure are air, CF and 4 、C 3 f 8 and SO 2 f 2 Co-overflow peaks, as can be seen from the figure, C 3 f 8 and SO 2 f 2 Co-overflow, cannot be separated; Figure 8 It is the result analyzed by the FPD detector of this embodiment, and the impurity peak in the figure is SO 2 f 2 , it can be seen that the analysis of SF by FPD detector 6 Decomposition product SO 2 f 2 It is not interfered by other impurities and is more a...

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Abstract

The invention discloses a method for analyzing decomposition products of SF6 in electric equipment. The method comprises the following steps: sampling; and analyzing and detecting a sample with a chromatograph, wherein the detection part of the chromatograph comprises a thermal conductivity detector (TCD) and fission-product detector (FPD) which are in serial connection, the chromatographic column adopts capillary column GS GasPro, and all the pipelines of the chromatograph must be passivated. By using the invention, the decomposition products such as SO2F2 in SF6 can be accurately analyzed; and by analyzing the decomposition impurities such as SO2F2, the internal operating condition of the SF6 gas isolating device can be effectively judged and the electric equipment failure can be successfully judged.

Description

technical field [0001] The invention belongs to the field of analysis and detection, and in particular relates to a method for analyzing decomposition products of SF6 in electrical equipment. Background technique [0002] Sulfur hexafluoride (SF 6 ) is a colorless, odorless, non-toxic, non-flammable and chemically stable synthetic gas at normal temperature and pressure. SF 6 The molecular structure of monosulfide and polyfluorine is extremely strong electronegativity, endowing it with excellent electrical insulation and arc extinguishing properties. Currently, SF 6 As a new generation of insulating medium, it is widely used in high-voltage and ultra-high-voltage electrical equipment. Refill SF 6 The electrical equipment occupies a small area, the operating noise is small, and there is no risk of fire, which greatly improves the safety and reliability of electrical equipment operation. [0003] SF 6 Under the action of overheating, electric arc, electric spark and coro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02
Inventor 王宇姚唯建李丽庄贤盛黄成吉黎晓淀
Owner 广东科立恩环保科技有限公司
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