On-line detection method for SF6 gas in electrical equipment

A technology of electric power equipment and detection method, applied in the field of mass spectrometry, can solve the problems such as the inability to measure the total pollutant content of the power system, achieve high resolution, good sensitivity, and improve the effect of sensitivity

Inactive Publication Date: 2014-10-08
GUANGXI POWER GRID ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
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Problems solved by technology

[0006] In order to overcome the problem that the prior art cannot measure the power system SF 6 The defect of the total pollutant co

Method used

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  • On-line detection method for SF6 gas in electrical equipment
  • On-line detection method for SF6 gas in electrical equipment
  • On-line detection method for SF6 gas in electrical equipment

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with drawings and implementation.

[0030] 1. The online mass spectrometry structure of the present invention is as figure 1 As shown, an online mass spectrometry device is used, which is composed of a direct sampling system 1 , a photoelectron ionization source 2 , a mass analyzer 3 and a signal receiving and detecting system 4 .

[0031] 1) Structure of each part

[0032] The direct sampling system 1 is composed of a flow controller, a buffer cavity, a tail joint and a capillary. The sample gas enters the buffer cavity through the flow controller and is converted into a low-pressure and low-flow gas, and then directly enters the photoelectron ionization source 2 through the capillary, and the rest of the sample gas flows out of the tail pipe to the direct sampling system 1. The capillary used is a fused silica capillary with an inner diameter of 50 μm and a length of 100 cm.

[0033] The photoelectr...

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Abstract

The invention discloses an on-line detection method for SF6 gas in electrical equipment. On-line mass spectrometer is employed for detection analysis. An employed ionization source of the on-line mass spectrometer is a photoelectron ionization source. A sample gas is firstly subjected to dedusting processing before being introduced, and directly enters a sample-introduction system, and is introduced to the on-line mass spectrometer under the condition of constant temperature by a capillary. The method does not need any sampled subjected to pretreatment, the detection speed is fast, the analysis time and the processing time are in 1 min, the sensitivity is high, and the method is suitable for on-site direct detection on SF6 gas in electrical equipment.

Description

technical field [0001] The invention belongs to a mass spectrometry analysis method, in particular to a kind of SF in electric equipment 6 Gas online detection method. The present invention uses a photoelectron ionization source micro-mass spectrometer to establish a capillary direct sampling, rapid and quantitative analysis of SF 6 A new approach to gas. Background technique [0002] Sulfur hexafluoride (SF 6 ) is a colorless, odorless, non-toxic and non-flammable inert gas at normal temperature and pressure, insoluble in water and transformer oil, its insulation level is about 3 times that of air, and its arc extinguishing performance is 100 times that of air , so SF 6 Gases are widely used in electrical equipment such as gas-insulated combiners, gas-insulated circuit breakers, transformers, and transformers. Currently, SF 6 Circuit breakers have basically replaced oil circuit breakers with a voltage level of 110kV and above (dual pressure circuit breakers, SF 6 The...

Claims

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Application Information

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IPC IPC(8): G01N30/72
Inventor 唐彬赵无垛朱立平侯可勇黄云光李海洋李文武
Owner GUANGXI POWER GRID ELECTRIC POWER RES INST
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