Detection device for detecting sulfur hexafluoride electrical equipment fault gas

Abstract

The invention discloses a detection device for detecting sulfur hexafluoride electrical equipment fault gas. The detection device provided by the invention comprises a thermal conductivity detector, a separator and a pulsed discharge helium ion detector, wherein the separator contains a helium gas intake, a first separation unit, a second separation unit and a third separation unit, the helium gas intake is connected with the first separation unit, which is respectively connected with the second separation unit and the third separation unit; the third separation unit is connected with the thermal conductivity detector and the pulsed discharge helium ion detector (PDD); and the second separation unit is connected with the third separation unit. Based on the gas chromatography principle and by the adoption of multiple chromatographic columns and the tail-blowing method, the separation system is established to separate all parts for the determination of SF6 electrical equipment faults, and the pulsed discharge helium ion detector is applied for quantity analysis, thus overcoming defects of the prior art and leading to a good separating effect.

Description

Technical field [0001] The present invention relates to the detection field of electrical equipment, in particular to a detection device for detecting the fault gas of sulfur hexafluoride electrical equipment. Background technique [0002] SF 6 As a new generation of electrical insulation medium, it has super insulation ability and arc extinguishing ability, and has non-combustibility. It was first used in circuit breakers and combined electrical appliances in the 1960s. In recent years, it has been expanded to be used in transformers, cables, etc. 6 Gas insulated equipment {including: transformers, circuit breakers, transformers, GIS (gas insulated fully enclosed combined electrical appliances)} has become the main development direction of high voltage equipment. [0003] For electrical equipment using SF6 gas as an insulating medium, when there are partial discharge, destructive discharge and overheating faults inside the equipment, the SF inside the equipment 6 Gas, solid insulat...

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Problems solved by technology

[0018] (1) There is zero drift of the instrument in the electrochemical method, and the stability of the instrument is poor;

[0019] (2) There is mutual interference in infrared spectroscopy, and the detection sensitivity cannot meet the requirements;

[0020] (3) The sensitivity of the gas chromatography thermal conductivity detector is not high, the response of the flame photometric detector is nonlinear, the response components are small, and the sensitivity cannot meet the detection requirements of fault decomposition products;

[0021] (4) Use a chromatographic column for separation, and the component resolution cannot meet the requirements

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