CN102590419B - Device used for analyzing mixed gas in expansion tank of power transformer and based on gas chromatographic technology - Google Patents

Device used for analyzing mixed gas in expansion tank of power transformer and based on gas chromatographic technology Download PDF

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Publication number
CN102590419B
CN102590419B CN201210030395.0A CN201210030395A CN102590419B CN 102590419 B CN102590419 B CN 102590419B CN 201210030395 A CN201210030395 A CN 201210030395A CN 102590419 B CN102590419 B CN 102590419B
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transformer
gas
way valve
installation
thermal conductivity
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CN102590419A (en
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司志国
刘霞
司伟
丁鲁生
刘胜燕
于世永
张英震
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SHANDONG XIANHE YUEXIN MECHANICAL AND ELECTRICAL Inc
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SHANDONG XIANHE YUEXIN MECHANICAL AND ELECTRICAL Inc
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Abstract

A device used for analyzing mixed gas in an expansion tank of a power transformer and based on gas chromatographic technology belongs to the technical field of electric power device state detection and comprises a transformer expansion tank, a vacuum pump (18), a ten-way valve (11) and a chromatographic column chamber (13). The device is characterized in that the transformer expansion tank is connected with the ten-way valve (11), the ten-way valve (11) is connected with a thermal conductivity detector (10) and the chromatographic column chamber (13) simultaneously, the thermal conductivity detector (10) is connected with a gas carrying bottle (3), the chromatographic column chamber (13) is connected with a hydrogen flame detector (17) through a reformer (16), and two openings of the hydrogen flame detector (17) are connected with an auxiliary gas bottle (4) and a combustion-supporting gas bottle (5) respectively. The device used for analyzing the mixed gas in the expansion tank of the power transformer and based on the gas chromatographic technology can be used for detecting various fault signature gas on line or on the site for large-scale power transformers and is high in sensitivity and precision and good in reliability.

Description

Analysing mixed device in power transformer conservator based on gas chromatographic technique
Technical field
Analysing mixed device in power transformer conservator based on gas chromatographic technique, belongs to status of electric power detection technique field, and this device is specifically designed to the mixed gas in power transformer conservator is carried out to stratographic analysis.
Background technology
Large-scale power transformer is one of equipment most important, the most expensive in power transmission and transformation system, the quality of its insulation status, and can be related to electric system move safely and reliably.To Gases Dissolved in Transformer Oil analysis, i.e. large quantity research and the practice of DGA shows, the H dissolving in transformer oil both at home and abroad 2, CH 4, C 2h 2, C 2h 4, C 2h 6, CO and CO 2it etc. the ratio between content, gas production rate and the content thereof of gas componant, is the authentic communication of reflection transformer built-in electrical insulation state, can find sensitiveer and exactly latent transformer defect and fault, generally believe that it is the powerful measure of the transformer insulated fault of diagnosis that DGA detects, DGA pick-up unit is arranged on operating transformer body, gas in field real-time acquisition and detection installation for transformer becomes a focus in this field, and how to improve sensitivity and the precision of Site Detection, make it more reliable, become a urgent problem.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, provide a kind of can be for or Site Detection various fault characteristic gases online to large-scale power transformer, highly sensitive, precision is high and the power transformer conservator based on gas chromatographic technique of good reliability in analysing mixed device.
The technical solution adopted for the present invention to solve the technical problems is: be somebody's turn to do analysing mixed device in the power transformer conservator based on gas chromatographic technique, comprise installation for transformer, vacuum pump, ten-way valve and chromatogram column compartment, it is characterized in that: installation for transformer is connected with ten-way valve, ten-way valve connects thermal conductivity detector (TCD) and chromatogram column compartment simultaneously, thermal conductivity detector (TCD) connects carrier gas bottle, chromatogram column compartment connects hydrogen flame detector by reburner, and two openings of hydrogen flame detector are connected to respectively auxiliary gas cylinder and combustion-supporting gas cylinder.Reburner is located in independent confined space, in temperature, is at 360 ℃, utilizes the catalytic action of nickel, by CO and CO 2be replaced as CH 4, like this, hydrogen flame detector just can react with it, detects its concentration, reaches and detects CO, CH simultaneously 4and CO 2the object of three kinds of gases, the signal after detection changes electric signal into, then through the recording pointer chromatographic peak that runs a curve, is calculated the content of tested gas each component by chromatographic peak.
In described chromatogram column compartment, be provided with 5A molecular sieve and TDX-01 post, 5A molecular sieve one end connects ten-way valve by alkali asbestos post, and the other end connects thermal conductivity detector (TCD), and thermal conductivity detector (TCD) connects carrier gas bottle by clarifier, TDX-01 post one end connects ten-way valve, and the other end connects reburner.Thermal conductivity detector (TCD) is to have the thermal conductivity coefficient different with carrier gas according to different material, when the gas by thermal conductance and concentration thereof change, will take away the heat not waiting from thermal sensing element wherein, cause the variation of its resistance, by electric bridge, can measure the resistance of variation, 5A molecular sieve is for separating of O 2and N 2, gas detects its content by thermal conductivity detector (TCD), and TDX-01 post is for separating of CO, CH 4and CO 2, be mainly used in trace detection, and by reburner transition detection CH 4gas, alkali asbestos post can be by CO 2absorption is with protection 5A molecular sieve.
Described installation for transformer comprises the first installation for transformer and the second installation for transformer, and the outlet side of the first installation for transformer and the second installation for transformer is all connected with ten-way valve by solenoid valve with inlet end, is also provided with vacuum pump between outlet side and ten-way valve.Vacuum pump is used for gas to be detected to extract out from the first installation for transformer or the second installation for transformer, the turnover of solenoid control gas.
On described hydrogen flame detector and auxiliary gas cylinder and combustion-supporting gas cylinder connecting line, be respectively equipped with clarifier, clarifier is dispelled moisture content and organic impurities in gas.
Described clarifier one side is connected with pressure maintaining valve, needle-valve and flowmeter in turn, and pressure maintaining valve is constant by gaseous tension, and flowmeter can be indicated gas flow.
One export pipeline of described ten-way valve is connected carrier gas bottle with after the pipeline parallel connection of thermal conductivity detector (TCD) place.
Compared with prior art, the present invention is based on the beneficial effect that in the power transformer conservator of gas chromatographic technique, analysing mixed device has is:
1, can tackle the online or various fault characteristic gases of Site Detection of large-scale power transformer: ten-way valve, reburner, hydrogen flame detector, 5A molecular sieve and TDX-01 post are set, can realize and detect CO, CH simultaneously 4and CO 2the object of three kinds of gases, the signal after detection changes electric signal into, then through the recording pointer chromatographic peak that runs a curve, is calculated the content of tested gas each component by chromatographic peak, realizes the online or various fault characteristic gases of Site Detection of large-scale power transformer;
2, measure highly sensitive, precision is high and good reliability: after tested, the testing process of whole system can complete with interior at 15 minutes, and microanalysis detectable concentration reaches 1PPM, macro-analysis concentration reaches 0.1%~0.2%, measure sensitivity higher, more accurate, improved reliability.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein: 1, the first installation for transformer 2, the second installation for transformer 3, carrier gas bottle 4, auxiliary gas cylinder 5, combustion-supporting gas cylinder 6, clarifier 7, pressure maintaining valve 8, needle-valve 9, flowmeter 10, thermal conductivity detector (TCD) 11, ten-way valve 12, alkali asbestos post 13, chromatogram column compartment 14,5A molecular sieve 15, TDX-01 post 16, reburner 17, hydrogen flame detector 18, vacuum pump 19, solenoid valve.
Fig. 1 is the most preferred embodiment that the present invention is based on analysing mixed device in the power transformer conservator of gas chromatographic technique, and below in conjunction with accompanying drawing 1, the present invention will be further described:
Embodiment
With reference to accompanying drawing 1: analysing mixed device in should the power transformer conservator based on gas chromatographic technique, comprises installation for transformer, vacuum pump 18, ten-way valve 11 and chromatogram column compartment 13.Installation for transformer comprises the first installation for transformer 1 and the second installation for transformer 2, the outlet side of the first installation for transformer 1 and the second installation for transformer 2 is equipped with solenoid valve 19 and is connected with ten-way valve 11 with inlet end simultaneously, between outlet side and ten-way valve 11, is provided with vacuum pump 18.Vacuum pump 18 is for extracting gas to be detected out from the first installation for transformer 1 or the second installation for transformer 2, solenoid valve 19 is controlled the turnover of gas.Ten-way valve 11 connects thermal conductivity detector (TCD) 10 and chromatogram column compartment 13 simultaneously, thermal conductivity detector (TCD) 10 connects carrier gas bottle 3, chromatogram column compartment 13 connects hydrogen flame detector 17 by reburner 16, and two openings of hydrogen flame detector 17 are connected to respectively auxiliary gas cylinder 4 and combustion-supporting gas cylinder 5.Reburner 16 is located in independent confined space, in temperature, is at 360 ℃, utilizes the catalytic action of nickel, by CO and C0 2be replaced as CH 4, like this, hydrogen flame detector 17 just can react with it, detects its concentration, reaches and detects CO, CH simultaneously 4and CO 2the object of three kinds of gases, the signal after detection changes electric signal into, then through the recording pointer chromatographic peak that runs a curve, is calculated the content of tested gas each component by chromatographic peak.
One export pipeline of ten-way valve 11 is connected carrier gas bottle 3 with after thermal conductivity detector (TCD) 10 place pipeline parallel connections.
In chromatogram column compartment 13, be provided with 5A molecular sieve 14 and TDX-01 post 15,5A molecular sieve 14 one end connect ten-way valve 11 by alkali asbestos post 12, the other end connects thermal conductivity detector (TCD) 10, thermal conductivity detector (TCD) 10 connects carrier gas bottle 3 by clarifier 6, TDX-01 post 15 one end connect ten-way valve 11, and the other end connects reburner 16.The principle of thermal conductivity detector (TCD) 10 is to have the thermal conductivity coefficient different with carrier gas according to different material, when the gas by thermal conductance and concentration thereof change, will take away the heat not waiting from thermal sensing element wherein, cause the variation of its resistance, by electric bridge, can measure the resistance of variation.5A molecular sieve 14 is for separating of O 2and N 2, gas detects its content by thermal conductivity detector (TCD) 10, and TDX-01 post 15 is for separating of CO, CH 4and CO 2, be mainly used in trace detection, and by reburner 16 transition detection CH 4gas, alkali asbestos post 12 can be by CO 2absorption is with protection 5A molecular sieve 14.
On hydrogen flame detector 17 and auxiliary gas cylinder 4 and combustion-supporting gas cylinder 5 connecting lines, be respectively equipped with clarifier 6, clarifier 6 is for dispelling moisture content and organic impurities in gas.
Clarifier 6 one sides are connected with pressure maintaining valve 7, needle-valve 8 and flowmeter 9 in turn, and pressure maintaining valve 7 is constant by gaseous tension, and flowmeter 9 can be indicated gas flow.
Principle of work and the course of work are as follows:
Be somebody's turn to do analysing mixed device in the power transformer conservator based on gas chromatographic technique and can be divided into detection O 2and N 2gas circuit and detect CO, CH 4and CO 2gas circuit.
Detect O 2and N 2gas circuit, the H in carrier gas bottle 3 2after clarifier 6, dispel moisture content and organic impurities and import chromatograph, first by pressure maintaining valve 7, nebulizer gas pressure is constant in chromatograph, flowmeter 9 can be indicated gas flow.
O 2and N 2testing process: under the effect of vacuum pump 18, the mixed gas of the first installation for transformer 1 or the second installation for transformer 2 enters the ten-way valve 11 in chromatograph under the control of solenoid valve 19, through alkali asbestos post 12 by CO 2absorption, after entering 5A molecular sieve 14, the detection through thermal conductivity detector (TCD) 10, changes detection signal into electric signal, then through the recording pointer chromatographic peak that runs a curve, is calculated the content of tested gas each component by chromatographic peak.
Detect CO, CH 4and CO 2gas circuit, hydrogen flame detector 17 is except carrier gas H 2also has assisted gas N outward, 2with help gas-air, N in auxiliary gas cylinder 4 2through clarifier 6, after pressure maintaining valve 7, enter hydrogen flame detector 17, in combustion-supporting gas cylinder 5, air, through clarifier 6, enters hydrogen flame detector 17 after pressure maintaining valve 7.
CO, CH 4and CO 2testing process: under the effect of vacuum pump 18, mixed gas in the first installation for transformer 1 or the second installation for transformer 2, under the control of solenoid valve 19, enter the ten-way valve 11 in chromatograph, by TDX-01 post 15, reburner 16, enters hydrogen flame detector 17, the electric signal of output after micro current amplifier to recording pointer, the recording pointer chromatographic peak that runs a curve, is calculated the content of tested gas each component by chromatographic peak.In power transformer conservator by this based on gas chromatographic technique, the microanalysis of analysing mixed device detects and can concentration reach 1PPM, and macro-analysis concentration reaches 0.1%~0.2%, and sensitivity is higher, more accurate.
The above, be only preferred embodiment of the present invention, is not the present invention to be done to the restriction of other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not depart from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.

Claims (4)

1. analysing mixed device in the power transformer conservator based on gas chromatographic technique, comprise installation for transformer, vacuum pump (18), ten-way valve (11) and chromatogram column compartment (13), it is characterized in that: installation for transformer is connected with ten-way valve (11), ten-way valve (11) connects thermal conductivity detector (TCD) (10) and chromatogram column compartment (13) simultaneously, thermal conductivity detector (TCD) (10) connects carrier gas bottle (3), chromatogram column compartment (13) connects hydrogen flame detector (17) by reburner (16), two openings of hydrogen flame detector (17) are connected to respectively auxiliary gas cylinder (4) and combustion-supporting gas cylinder (5), in chromatogram column compartment (13), be provided with 5A molecular sieve (14) and TDX-01 post (15), 5A molecular sieve (14) one end connects ten-way valve (11) by alkali asbestos post (12), the other end connects thermal conductivity detector (TCD) (10), thermal conductivity detector (TCD) (10) connects carrier gas bottle (3) by clarifier (6), TDX-01 post (15) one end connects ten-way valve (11), and the other end connects reburner (16),
Described installation for transformer comprises the first installation for transformer (1) and the second installation for transformer (2), the outlet side of the first installation for transformer (1) and the second installation for transformer (2) is all connected with ten-way valve (11) by solenoid valve (19) with inlet end, is also provided with vacuum pump (18) between outlet side and ten-way valve (11).
2. analysing mixed device in the power transformer conservator based on gas chromatographic technique according to claim 1, is characterized in that: on described hydrogen flame detector (17) and auxiliary gas cylinder (4) and combustion-supporting gas cylinder (5) connecting line, be respectively equipped with clarifier (6).
3. analysing mixed device in the power transformer conservator based on gas chromatographic technique according to claim 1, is characterized in that: front pressure maintaining valve (7), needle-valve (8) and the flowmeter (9) of being provided with successively of described clarifier (6).
4. analysing mixed device in the power transformer conservator based on gas chromatographic technique according to claim 1, is characterized in that: an export pipeline of described ten-way valve (11) is connected carrier gas bottle (3) with after thermal conductivity detector (TCD) (10) place pipeline parallel connection.
CN201210030395.0A 2012-02-10 2012-02-10 Device used for analyzing mixed gas in expansion tank of power transformer and based on gas chromatographic technology Active CN102590419B (en)

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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
CN106645498B (en) * 2017-01-16 2022-07-05 国网福建省电力有限公司 Automatic starting device and starting method of transformer oil gas chromatography detector
CN110806515A (en) * 2019-10-11 2020-02-18 大唐水电科学技术研究院有限公司 Transformer comprehensive state evaluation method
CN111239281A (en) * 2020-02-12 2020-06-05 西南石油大学 Improved gas chromatography carrier gas system
CN112414611B (en) * 2020-11-26 2022-07-08 沈阳欧施盾新材料科技有限公司 Method and system for monitoring pressure of transformer gas cylinder based on chromatograph

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