CN102967671A - Device and method for detecting sulfur hexafluoride gas in oil immersed transformer - Google Patents
Device and method for detecting sulfur hexafluoride gas in oil immersed transformer Download PDFInfo
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- CN102967671A CN102967671A CN2012104785793A CN201210478579A CN102967671A CN 102967671 A CN102967671 A CN 102967671A CN 2012104785793 A CN2012104785793 A CN 2012104785793A CN 201210478579 A CN201210478579 A CN 201210478579A CN 102967671 A CN102967671 A CN 102967671A
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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
The invention belongs to the electrical engineering technical field, be specifically related to checkout equipment and the method for sulfur hexafluoride gas in a kind of oil-filled transformer.
Background technology
Transformer insulation oil and sulfur hexafluoride gas are power industry insulating mediums commonly used; both can not use with; if but the insulating gas sulfur hexafluoride insulating oil side medium that bleeds in the oil-filled transformer oil-gas casing; can cause transformer differential protection action or gas action, have a strong impact on device security stable operation.Sulfur hexafluoride gas can be partially soluble in the insulating oil medium after this type of fault occured, and other then can enter in the gas collector box.
Be dissolved in the sulfur hexafluoride gas in the insulating oil, can degassedly deviate from hydrogen, alkane etc. by shaking, in carrying out conventional transformer dissolved gas analysis process, sulfur hexafluoride gas can cause devastating impact to the nickel reburner of gas chromatograph.And the collection of gas also inevitably can be brought insulating oil in the gas collector box, in carrying out device in Gas during the detection of sulfur hexafluoride gas content, insulating oil can cause on the chromatographic column in the sulfur hexafluoride special color spectrometer again the damageability impact, and the method can not be analyzed the insulating oil characteristics of decomposition gas that exists in the device in Gas.Based on these two reasons, use conventional analysis instrument and method not only can't carry out the judgement of sulfur hexafluoride gas seepage fault, but also can cause the damage of analytical instrument.
Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art, can not be used for that sulfur hexafluoride gas analysis, sulfur hexafluoride special color spectrometer can not be used for the gas analysis of insulating oil characteristics of decomposition and to the defective of insulating oil hypersensitivity for the Gases Dissolved in Transformer Oil analytical chromatograph, propose a kind of Apparatus and method for that insulating oil characteristics of decomposition gas and sulfur hexafluoride gas detect simultaneously in the oil-filled transformer that can be used for.
In order to achieve the above object, technical scheme provided by the invention is:
The checkout equipment of sulfur hexafluoride gas comprises the carrier gas generating means in the described oil-filled transformer, the oil suction post that is connected with the carrier gas generating means, the A chromatographic column that is connected with the oil suction post respectively and B chromatographic column, the fid detector that is connected with the A chromatographic column and the TCD detecting device that is connected with the B chromatographic column; Be provided with injection port between described carrier gas generating means and the oil suction post.
Wherein, described oil suction post is the WX-01 type oil suction post that Wal, Wuhan moral engineering company limited produces; Described A chromatographic column and B chromatographic column are packed column; Fixing in the described A chromatographic column be the fixing phase of w-01 type of Wal, Wuhan moral engineering company limited production mutually, 1-5 meters of column lengths; Fixing in the B chromatographic column be the fixing phase of w-03 type of Wal, Wuhan moral engineering company limited production mutually, 1-5 meters of column lengths.
A kind of method based on sulfur hexafluoride gas in the said equipment detection oil-filled transformer comprises the steps:
The component of (1) getting finite concentration and certain volume is the calibrating gas of sulfur hexafluoride, methane, ethane, ethene and acetylene; This calibrating gas can be commercially available, and its concentration and volume are decided by the manufacturer production specification;
(2) adopt conventional gas chromatography analysis method, inject calibrating gas from injection port, under the carrier gas mobilization, calibrating gas is divided into two-way after by the oil suction post, and (two the gas in the gas circuit is identical, obtain the testing result of gas with various by different processing and detection method), lead up to A chromatographic column separation of methane, ethane, ethene and four kinds of hydrocarbon components of acetylene, and determine peak time and peak height parameter by fid detector, realize the demarcation of methane, ethane, ethene and four kinds of hydrocarbon components of acetylene; Sulfur hexafluoride is separated by the B chromatographic column in another road, and determines peak time and peak height parameter by the TCD detecting device, realizes the demarcation of sulfur hexafluoride; Wherein, described carrier gas is nitrogen, and nitrogen can reach the effect that tested gas is separated and detects, and can detect optimum carrier as TCD, FID, and flow rate of carrier gas is 1-30mL/mL; A chromatographic column and B chromatographic column column temperature are 50-80 ℃; The TCD detector temperature is 60-80 ℃;
(3) adopt conventional method, from transformer oil to be measured, deviate from dissolved gas as sample gas, or from the gas collector box of transformer to be measured, take out methane gas as sample gas; Get the sample gas with step (1) equal volume, according to the selected chromatographic condition of step (2) and step sample gas component and content are analyzed, the one-tenth that obtains in the sample gas is grouped into, particularly the content of sulfur hexafluoride in the sample gas.
Wherein, described oil suction post is the WX-01 type oil suction post that Wal, Wuhan moral engineering company limited produces; Described A chromatographic column and B chromatographic column are packed column; Fixing in the described A chromatographic column be the fixing phase of w-01 type of Wal, Wuhan moral engineering company limited production mutually, column length 1-5 rice; Fixing in the B chromatographic column be the fixing phase of w-03 type of Wal, Wuhan moral engineering company limited production mutually, column length 1-5 rice.
Compared with prior art, beneficial effect of the present invention is:
There is the sulfur hexafluoride gas seepage to enter the situation of transformer for suspection, adopt the inventive method can in the analytic routines oil dissolved gas, understand the seepage situation of sulfur hexafluoride gas by getting transformer oil sample or device in Gas sample, avoid Gases Dissolved in Transformer Oil analytical chromatograph and the special-purpose chromatographic damage of sulfur hexafluoride, confirm in time that particularly the sulfur hexafluoride gas seepage enters transformer for guaranteeing that the transformer safe and stable operation is significant.
Description of drawings
Fig. 1 is the structural representation of present device;
Fig. 2 is the analysis data plot that the 1ml calibrating gas obtains in the embodiment of the invention;
Fig. 3 is the analysis data plot that the 1ml sample gas obtains in the embodiment of the invention.
Among Fig. 1,1-carrier gas generating means; The 2-injection port; 3-oil suction post; 4-chromatographic column 1; The 5-FID detecting device; 6-chromatographic column 2; The 7-TCD detecting device.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Embodiment 1
Referring to Fig. 1, the checkout equipment of sulfur hexafluoride gas comprises that carrier gas fills in the described oil-filled transformer, 1, the oil suction post 3 that is connected with carrier gas generating means 1, the A chromatographic column 4 that is connected with oil suction post 3 respectively and B chromatographic column 6, the fid detector 5 that is connected with A chromatographic column 4 and the TCD detecting device 7 that is connected with B chromatographic column 6; Be provided with injection port 2 between described carrier gas generating means 1 and the oil suction post 3.
Wherein, described oil suction post 3 is the WX-01 type oil suction post that Wal, Wuhan moral engineering company limited produces; Described A chromatographic column 4 and B chromatographic column 6 are packed column; Fixing in the described A chromatographic column 4 be the fixing phase of w-01 type of Wal, Wuhan moral engineering company limited production mutually, 1-5 meters of column lengths; Fixing in the B chromatographic column 6 be the fixing phase of w-03 type of Wal, Wuhan moral engineering company limited production mutually, 1-5 meters of column lengths.
A kind of method based on sulfur hexafluoride gas in the said equipment detection oil-filled transformer comprises the steps:
(1) gets the calibrating gas that the 1mL component is sulfur hexafluoride, methane, ethane, ethene and acetylene; This calibrating gas can be commercially available, and its concentration and volume are decided by the manufacturer production specification;
(2) inject calibrating gas from injection port, injector temperature is 60 ℃, under the carrier gas mobilization, calibrating gas is divided into two-way after by the oil suction post, lead up to A chromatographic column separation of methane, ethane, ethene and four kinds of hydrocarbon components of acetylene, and determine peak time and peak height parameter by fid detector, realize the demarcation of methane, ethane, ethene and four kinds of hydrocarbon components of acetylene; Sulfur hexafluoride is separated by the B chromatographic column in another road, and determines peak time and peak height parameter by the TCD detecting device, realizes the demarcation of sulfur hexafluoride; Wherein, described carrier gas is nitrogen, and flow rate of carrier gas is 15mL/mL; A chromatographic column and B chromatographic column column temperature are 60 ℃; The TCD detector temperature is 60 ℃;
(3) from transformer oil to be measured, deviate from dissolved gas as sample gas, or from the gas collector box of transformer to be measured, take out methane gas as sample gas; Get the sample gas with step (1) equal volume, according to the selected chromatographic condition of step (2) and step sample gas component and content are analyzed.
Wherein, described oil suction post is the WX-01 type oil suction post that Wal, Wuhan moral engineering company limited produces; Described A chromatographic column and B chromatographic column are packed column; Fixing in the described A chromatographic column be the fixing phase of w-01 type of Wal, Wuhan moral engineering company limited production mutually, 3 meters of column lengths; Fixing in the B chromatographic column be the fixing phase of w-03 type of Wal, Wuhan moral engineering company limited production mutually, 2 meters of column lengths.
The analysis result of said method sees Table 1, table 2, Fig. 2 and Fig. 3.
Table 1:
| Sequence number | Component | Concentration μ L/L | Peak height mv |
| 1 | Methane | 412 | 10048 |
| 2 | Ethene | 318 | 9987 |
| 3 | Ethane | 294 | 8367 |
| 4 | Acetylene | 185 | 4424 |
| 5 | Sulfur hexafluoride | 498 | 5860 |
Table 2:
| Sequence number | Component | Concentration μ L/L | Peak height mv |
| 1 | Methane | 440 | 10732 |
| 2 | Ethene | 312 | 9808 |
| 3 | Ethane | 282 | 8027 |
| 4 | Acetylene | 179 | 4289 |
| 5 | Sulfur hexafluoride | 51 | 600 |
Claims (8)
1. the checkout equipment of sulfur hexafluoride gas in the oil-filled transformer, it is characterized in that, described equipment comprises carrier gas generating means (1), the oil suction post (3) that is connected with carrier gas generating means (1), the A chromatographic column (4) that is connected with oil suction post (3) respectively and B chromatographic column (6), the fid detector (5) that is connected with A chromatographic column (4) and the TCD detecting device that is connected with B chromatographic column (6); Be provided with injection port (2) between described carrier gas generating means (1) and the oil suction post (3).
2. equipment as claimed in claim 1 is characterized in that, described oil suction post (3) is the WX-01 type oil suction post that Wal, Wuhan moral engineering company limited produces.
3. equipment as claimed in claim 1 is characterized in that, described A chromatographic column (4) and B chromatographic column (6) are packed column.
4. equipment as claimed in claim 3 is characterized in that, fixing in the described A chromatographic column (4) be the fixing phase of w-01 type of Wal, Wuhan moral engineering company limited production mutually, 1-5 meters of column lengths; Fixing in the B chromatographic column (6) be the fixing phase of w-03 type of Wal, Wuhan moral engineering company limited production mutually, 1-5 meters of column lengths.
5. the method based on sulfur hexafluoride gas in each described equipment Inspection oil-filled transformer of claim 1 to 4 comprises the steps:
(1) gets the calibrating gas that component is sulfur hexafluoride, methane, ethane, ethene and acetylene;
(2) inject calibrating gas from injection port, under the carrier gas mobilization, calibrating gas is divided into two-way after by the oil suction post, lead up to A chromatographic column separation of methane, ethane, ethene and four kinds of hydrocarbon components of acetylene, and determine peak time and peak height parameter by fid detector, realize the demarcation of methane, ethane, ethene and four kinds of hydrocarbon components of acetylene; Sulfur hexafluoride is separated by the B chromatographic column in another road, and determines peak time and peak height parameter by the TCD detecting device, realizes the demarcation of sulfur hexafluoride; Wherein, described carrier gas is nitrogen, and flow rate of carrier gas is 1-30mL/mL; A chromatographic column and B chromatographic column column temperature are 50-80 ℃; The TCD detector temperature is 60-80 ℃;
(3) from transformer oil to be measured, deviate from dissolved gas as sample gas, or from the gas collector box of transformer to be measured, take out methane gas as sample gas; Get the sample gas with step (1) equal volume, according to the selected chromatographic condition of step (2) and step sample gas component and content are analyzed.
6. method as claimed in claim 5 is characterized in that, described oil suction post is the WX-01 type oil suction post that Wal, Wuhan moral engineering company limited produces.
7. method as claimed in claim 5 is characterized in that, described A chromatographic column and B chromatographic column are packed column.
8. equipment as claimed in claim 7 is characterized in that, fixing in the described A chromatographic column be the fixing phase of w-01 type of Wal, Wuhan moral engineering company limited production mutually, 1-5 meters of column lengths; Fixing in the B chromatographic column be the fixing phase of w-03 type of Wal, Wuhan moral engineering company limited production mutually, 1-5 meters of column lengths.
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Cited By (7)
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| CN103558313A (en) * | 2013-11-15 | 2014-02-05 | 国家电网公司 | Gas chromatography determination device for sulfur hexafluoride decomposition products |
| CN105241985A (en) * | 2014-05-28 | 2016-01-13 | 国网山西省电力公司电力科学研究院 | Method used for acquiring gas chromatogram of insulating oil in transformers |
| CN110836940A (en) * | 2019-11-13 | 2020-02-25 | 国网福建省电力有限公司 | Micro-filling column for portable insulating oil chromatographic analyzer and preparation method and application thereof |
| CN110967580A (en) * | 2019-11-13 | 2020-04-07 | 宁波荣集锦科技有限公司 | Transformer test device |
| CN111473921A (en) * | 2020-04-16 | 2020-07-31 | 国网湖南省电力有限公司 | Detection system of sulfur hexafluoride leakage alarm device |
| CN111766018A (en) * | 2020-05-25 | 2020-10-13 | 国网上海市电力公司 | Method for judging internal leakage of sulfur hexafluoride in oil gas casing |
| CN114047278A (en) * | 2021-12-10 | 2022-02-15 | 杭州晟冠科技有限公司 | Calibration device and method for double-chromatographic-column oil gas online monitoring system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103558313A (en) * | 2013-11-15 | 2014-02-05 | 国家电网公司 | Gas chromatography determination device for sulfur hexafluoride decomposition products |
| CN105241985A (en) * | 2014-05-28 | 2016-01-13 | 国网山西省电力公司电力科学研究院 | Method used for acquiring gas chromatogram of insulating oil in transformers |
| CN105241985B (en) * | 2014-05-28 | 2017-07-18 | 国网山西省电力公司电力科学研究院 | The method for obtaining insulating oil gas-chromatography in transformer |
| CN110836940A (en) * | 2019-11-13 | 2020-02-25 | 国网福建省电力有限公司 | Micro-filling column for portable insulating oil chromatographic analyzer and preparation method and application thereof |
| CN110967580A (en) * | 2019-11-13 | 2020-04-07 | 宁波荣集锦科技有限公司 | Transformer test device |
| CN110967580B (en) * | 2019-11-13 | 2021-10-29 | 宁波铂汉科技有限公司 | Transformer test device |
| CN110836940B (en) * | 2019-11-13 | 2022-05-13 | 国网福建省电力有限公司 | Micro-filling column for portable insulating oil chromatographic analyzer and preparation method and application thereof |
| CN111473921A (en) * | 2020-04-16 | 2020-07-31 | 国网湖南省电力有限公司 | Detection system of sulfur hexafluoride leakage alarm device |
| CN111766018A (en) * | 2020-05-25 | 2020-10-13 | 国网上海市电力公司 | Method for judging internal leakage of sulfur hexafluoride in oil gas casing |
| CN114047278A (en) * | 2021-12-10 | 2022-02-15 | 杭州晟冠科技有限公司 | Calibration device and method for double-chromatographic-column oil gas online monitoring system |
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