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Device and method for detecting sulfur hexafluoride gas in oil immersed transformer

A technology of sulfur hexafluoride gas and oil-immersed transformers, which is applied in the field of electrical engineering, can solve the problems that the special sulfur hexafluoride chromatograph cannot use insulating oil to decompose characteristic gas analysis, and the high sensitivity of insulating oil, etc., to ensure safety The effect of stable operation and avoiding damage

Active Publication Date: 2013-03-13
HUNAN ELECTRIC POWER CORP RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the deficiencies in the prior art, aiming at that the dissolved gas analysis chromatograph in transformer oil cannot be used for sulfur hexafluoride gas analysis, the sulfur hexafluoride special chromatograph cannot be used for the analysis of insulating oil decomposition characteristic gas, and the analysis of insulating oil Highly sensitive defects, propose a device and method that can be used for simultaneous detection of insulating oil decomposition characteristic gas and sulfur hexafluoride gas in oil-immersed transformers

Method used

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  • Device and method for detecting sulfur hexafluoride gas in oil immersed transformer
  • Device and method for detecting sulfur hexafluoride gas in oil immersed transformer
  • Device and method for detecting sulfur hexafluoride gas in oil immersed transformer

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Embodiment 1

[0021] see figure 1 , the detection equipment of sulfur hexafluoride gas in the oil-immersed transformer comprises a carrier gas generating device 1, an oil absorption column 3 connected to the carrier gas generating device 1, an A chromatographic column 4 and a B chromatographic column connected to the oil absorption column 3 respectively Column 6, FID detector 5 connected to A chromatographic column 4 and TCD detector 7 connected to B chromatographic column 6; a sample inlet 2 is provided between the carrier gas generator 1 and the oil absorption column 3.

[0022] Wherein, the oil-absorbing column 3 is a WX-01 type oil-absorbing column produced by Wuhan World Engineering Technology Co., Ltd.; the A chromatographic column 4 and the B chromatographic column 6 are packed columns; the stationary phase in the A chromatographic column 4 The w-01 stationary phase produced by Wuhan World Engineering Technology Co., Ltd. has a column length of 1-5 meters; the stationary phase in col...

Embodiment 2

[0024] A method for detecting sulfur hexafluoride gas in an oil-immersed transformer based on the above equipment, comprising the steps of:

[0025] (1) Take 1mL of standard gas whose components are sulfur hexafluoride, methane, ethane, ethylene and acetylene; this standard gas is commercially available, and its concentration and volume are determined by the manufacturer’s production specifications;

[0026] (2) Inject the standard gas from the injection port, the temperature of the injection port is 60°C, under the action of the carrier gas flow, the standard gas is divided into two paths evenly after passing through the oil absorption column, and one path passes through the A chromatographic column to separate methane, ethane, ethylene and The four hydrocarbon components of acetylene, and determine the peak time and peak height parameters through the FID detector, to realize the calibration of the four hydrocarbon components of methane, ethane, ethylene and acetylene; the oth...

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Abstract

The invention discloses a device and a method for detecting sulfur hexafluoride gas in an oil immersed transformer. The device comprises a carrier gas generator, an oil absorption column connected with the carrier gas generator, an A chromatographic column (4) and a B chromatographic column (6) which are respectively connected with the oil absorption column, an FID (flame ionization detector) connected with the A chromatographic column, and a TCD (Thermal Conductivity Detector) connected with the B chromatographic column, wherein a sample inlet is formed between the carrier gas generator and the oil absorption column. If suspecting the sulfur hexafluoride gas leaks into the transformer, a user can know the leakage condition of the sulfur hexafluoride gas simultaneously when analyzing the dissolved gas in the conventional oil, by taking an oil sample or a gas sample from the transformer by the device according to the method, and therefore a chromatographic instrument for the dissolved gas in the oil of the transformer and a special chromatographic instrument for the sulfur hexafluoride are prevented from being damaged, and especially the timely confirmation of the sulfur hexafluoride leaking into the transformer has significance for ensuring the safe and stable operation of the transformer.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and in particular relates to a detection device and method for sulfur hexafluoride gas in an oil-immersed transformer. Background technique [0002] Transformer insulating oil and sulfur hexafluoride gas are commonly used insulating media in the power industry, and they cannot be used together. However, if the insulating gas sulfur hexafluoride in the oil-gas bushing of an oil-immersed transformer leaks into the insulating oil medium side, it will cause the transformer differential The protection action or gas action seriously affects the safe and stable operation of the equipment. After such a fault occurs, part of the sulfur hexafluoride gas will dissolve in the insulating oil medium, and the rest will enter the gas collecting box. [0003] Sulfur hexafluoride gas dissolved in insulating oil can be released together with hydrogen and alkanes through shock degassing. During the a...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/46
Inventor 胡旭周舟钱晖刘小玲陶靖
Owner HUNAN ELECTRIC POWER CORP RES INST
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