CN101762655A - Method for detecting internal fault of SF6 electrical equipment by using gas chromatograph - Google Patents
Method for detecting internal fault of SF6 electrical equipment by using gas chromatograph Download PDFInfo
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- CN101762655A CN101762655A CN200910227268A CN200910227268A CN101762655A CN 101762655 A CN101762655 A CN 101762655A CN 200910227268 A CN200910227268 A CN 200910227268A CN 200910227268 A CN200910227268 A CN 200910227268A CN 101762655 A CN101762655 A CN 101762655A
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Abstract
The invention relates to a method for detecting internal fault of SF6 electrical equipment by using a gas chromatograph, comprising the following steps: a stainless steel tube filled with 60-80 meshes of GDX-301 stationary phase is firstly selected as a chromatographic column, then 50mL of SF6 gas sample is extracted from the SF6 electrical equipment in the field for later use; the chromatographic column is placed in the gas chromatograph, hydrogen is selected as carrier gas, and working conditions of a TCD (thermal conductivity detector) in the gas chromatograph is set; the chromatograph is demarcated; 0.5mL of gas sample is selected and the gas sample is injected into the chromatograph through an injection port of the chromatograph with the use of an injector, the computing mode of the chromatograph is selected, and then the gas sample is identified whether H2S or SO2 exists or not by the TCD after the gas sample is separated by the chromatograph and the contents of H2S and SO2 gases are automatically calculated; and the result is analyzed. The invention adopts gas-solid chromatography and has the advantages of good stability, less gas consumption, ready-for-detection and high accuracy, etc. The method is easy and feasible and has low detection cost. The invention provides simple and effective means for early detection of the internal fault of the SF6 electrical equipment and in-time elimination of hidden dangers.
Description
Technical field
The present invention relates to a kind of detection method of electrical equipment malfunction, especially relate to a kind of gas chromatograph that utilizes and detect SF
6The method of inside electric appliance fault.
Background technology
At present, along with the high speed development of electrical network, SF
6Gas has become the unique important dielectric of UHV (ultra-high voltage) and extra-high voltage electrical equipment, and its technology has been used more than 20 year, but its inspection means are mainly to detect SF
6Moisture in the gas is main, and moisture can only be predicted the insulation and the arc extinguishing ability of electrical equipment, and whether unpredictable inside electric appliance exists hidden danger.Use the decomposition gas in the sensor equipment in the society, but the equipment of need has a power failure, will link to each other, also need guarantee that certain device air pressure just can detect that this method of testing takes time and effort, wastes gas, contaminated environment, should not select for use in equipment.
Summary of the invention
The object of the present invention is to provide a kind of H that utilizes in the gas chromatograph detection electrical equipment
2S, SO
2Gas content is judged SF
6Whether electric equipment inside exists the gas chromatograph that utilizes of hidden danger to detect SF
6The method of inside electric appliance fault.
For achieving the above object, the present invention is by the following technical solutions:
A kind of gas chromatograph that utilizes of the present invention detects SF
6The method of inside electric appliance fault, it comprises the steps:
Step 1: the stainless-steel tube of selecting filling 60～80 order GDX-301 stationary phase for use is as chromatographic column, and SF is extracted at the scene
6SF in the electrical equipment
650mL is standby for the gas sample;
Step 2: chromatographic column is put into gas chromatograph, and selecting hydrogen is carrier gas, and setting gas chromatograph TCD thermal conductivity detector (TCD) condition of work is: dry sound≤0.02mv; Drift≤0.25mv/min, post case, perfusor temperature are 80 ℃, detector temperature is 100 ℃, TCD decay * range: 1 * 0.05, the TCD hot-wire temperature is 180 ℃ ± 10 ℃; Heater current is: 100 ± 2mA;
Step 3: use syringe to inject and contain H from chromatographic notes sample mouth
2S, SO
2, N
2The mixing standard specimen gas 0.5mL of gas demarcates chromatograph;
Step 4: get the on-the-spot SF of extraction in the first step
6SF in the electrical equipment
6Gas sample 0.5mL uses syringe to be injected into the chromatograph from chromatographic notes sample mouth, and selected chromatographic computation schema, gas sample separate the back through chromatographic column and detect H by thermal conductance assessor
2S, SO
2Whether exist, and calculate H automatically according to following formula
2S, SO
2The content of gas:
Ci＝CsiAi/Asi
Ci: i component concentration in the gas sample
Csi: i component concentration in the gas
Ai: i component peaks area in the gas sample
Asi: i component peaks area in the gas;
Step 5: interpretation of result:
If do not detect H
2S, SO
2The existence of gas illustrates SF
6The electrical equipment safe operation;
If chromatograph detects H
2S, SO
2The trace of gas exists, and SF is described
6Electrical equipment has minor failure, needs to shorten sense cycle, grasps development trend;
If chromatograph detects H
2S, SO
2Gas exists, and, H
2S, SO
2The gas production rate of gas greater than 10%/month the time, just need SF
6The electrical equipment out-of-service inspection is in time removed a hidden danger, and guarantees equipment safety operation.
The above-mentioned gas chromatograph that utilizes detects SF
6The method of inside electric appliance fault, the described stainless steel pipe range of step 1 2m, internal diameter 3mm.
The above-mentioned gas chromatograph that utilizes detects SF
6The method of inside electric appliance fault, the purity of the described hydrogen of step 2 is more than or equal to 99.99%.
The invention has the beneficial effects as follows: adopt said method, the one, save SF6 gas: only need 50mL, avoided environmental pollution.The 2nd, can unusual SF6 electrical equipment be detected in real time, avoided the accident generation, eliminate accident potential.The 3rd, can chargedly take a sample, alleviated each professional's working strength, avoided reducing the economic loss that power supply brings.The 4th, GDX-301 stationary phase chromatographic column is combined with gas chromatograph, can reach the fault purpose that detects SF6 electric equipment inside, method is simple and feasible, and it is low to detect cost.
The present invention adopts gas-solid chromatography, has that stability is good, gas consumption is few, characteristics such as detection, accuracy rate height at any time, is SF
6The early stage inspection of inside electric appliance fault, in time removing a hidden danger provides easy, effective means.
Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can obtain instruction from the practice of the present invention to investigating hereinafter.Target of the present invention and other advantages can be passed through following instructions, claims, and the specifically noted structure realizes and obtains in the accompanying drawing.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is a gas chromatographic analysis process block diagram of the present invention
Fig. 2 is H of the present invention
2S, SO
2The standard specimen spectrogram of gas
Embodiment
As shown in Figure 1, a kind of gas chromatograph that utilizes of the present invention detects SF
6The method of inside electric appliance fault is characterized in that: it comprises the steps:
Step 1: the stainless-steel tube of selecting filling 60～80 order GDX-301 stationary phase for use is as chromatographic column, and SF is extracted at the scene
6SF in the electrical equipment
650mL is standby for the gas sample;
Step 2: chromatographic column is put into gas chromatograph, and selection purity is carrier gas more than or equal to 99.99% hydrogen, and setting gas chromatograph TCD thermal conductivity detector (TCD) condition of work is: dry sound≤0.02mv; Drift≤0.25mv/min, post case, perfusor temperature are 80 ℃, detector temperature is 100 ℃, TCD decay * range: 1 * 0.05, the TCD hot-wire temperature is 180 ℃ ± 10 ℃; Heater current is: 100 ± 2mA;
Step 3: use syringe to inject and contain H from chromatographic notes sample mouth
2S, SO
2, N
2The mixing standard specimen gas 0.5mL of gas demarcates chromatograph;
Step 4: get the on-the-spot SF of extraction in the first step
6SF in the electrical equipment
6Gas sample 0.5mL uses syringe to be injected into the chromatograph from chromatographic notes sample mouth, and selected chromatographic computation schema, gas sample separate the back through chromatographic column and detect H by thermal conductance assessor
2S, SO
2Whether exist, and calculate H automatically according to following formula
2S, SO
2The content of gas:
Ci＝CsiAi/Asi
Ci: i component concentration in the gas sample
Csi: i component concentration in the gas
Ai: i component peaks area in the gas sample
Asi: i component peaks area in the gas;
Step 5: interpretation of result:
If do not detect H
2S, SO
2The existence of gas illustrates SF
6The electrical equipment safe operation;
If chromatograph detects H
2S, SO
2The trace of gas exists, and SF is described
6Electrical equipment has minor failure, needs to shorten sense cycle, grasps development trend;
If chromatograph detects H
2S, SO
2Gas exists, and, H
2S, SO
2The gas production rate of gas greater than 10%/month the time, just need SF
6The electrical equipment out-of-service inspection is in time removed a hidden danger, and guarantees equipment safety operation.
The described stainless steel pipe range of step 1 2m, internal diameter 3mm.
As shown in Figure 2: H in the spectrogram
2S, SO
2, N
2The peak height of gas is higher, and the distance between the peak value is reasonable, clear, is convenient to differentiate.
Generally speaking, the length of chromatographic column is short more, and the distance in the gas sample between the peak value of component content is near more, and like this, degree of separation is not high, is not easy to differentiate, and increases the error that gas content calculates.For drawing back the distance between the peak value between the component in the gas sample, be convenient to differentiate, reduce error.The caliber of chromatographic column is more little in addition, and intraductal atmospheric pressure is big more, and peak value is not high.Therefore, through the chromatographic column of different chromatographic column internal diameters and different length is carried out the standard specimen spectrum analysis, the length of determining chromatographic column is 2m, internal diameter 3mm.
On March 10th, 2009, the on-the-spot SF that extracts in building the electrical equipment of 220kV transformer station in 2008
6SF in the electrical equipment
6Gas sample 50mL, selecting length for use is that the stainless-steel tube of 2m, internal diameter 3mm filling 60～80 order GDX-301 stationary phase is as chromatographic column;
Chromatographic column is put into gas chromatograph, and selection purity is carrier gas more than or equal to 99.99% hydrogen, and setting gas chromatograph TCD thermal conductivity detector (TCD) condition of work is: dry sound≤0.02mv; Drift≤0.25mv/min, post case, perfusor temperature are 80 ℃, detector temperature is 100 ℃, TCD decay * range: 1 * 0.05, the TCD hot-wire temperature is 180 ℃ ± 10 ℃; Heater current is: 100 ± 2mA;
Use syringe to inject and contain H from chromatographic notes sample mouth
2S, SO
2, N
2The mixing standard specimen gas 0.5mL of gas demarcates chromatograph;
SF is extracted in the enchashment field
6SF in the electrical equipment
6Gas sample 0.5mL uses syringe to be injected into the chromatograph from chromatographic notes sample mouth, calculates H in the gas sample according to Ci=CsiAi/Asi through chromatograph
2S, SO
2The content of gas is 0.
SF is described
6The electrical equipment safe operation.
On April 6th, 2009, the operation worker hears that device interior has abnormal voice when operation 220 disconnectores, suspects there is electric fault the on-the-spot SF that extracts in the electrical equipment of 220kV transformer station
6Gas sample 50mL; Selecting length for use is that the stainless-steel tube of 2m, internal diameter 3mm filling 60～80 order GDX-301 stationary phase is as chromatographic column.
Chromatographic column is put into gas chromatograph, and selection purity is carrier gas more than or equal to 99.99% hydrogen, and setting gas chromatograph TCD thermal conductivity detector (TCD) condition of work is: dry sound≤0.02mv; Drift≤0.25mv/min, post case, perfusor temperature are 80 ℃, detector temperature is 100 ℃, TCD decay * range: 1 * 0.05, the TCD hot-wire temperature is 180 ℃ ± 10 ℃; Heater current is: 100 ± 2mA;
Use syringe to inject and contain H from chromatographic notes sample mouth
2S, SO
2, N
2The mixing standard specimen gas 0.5mL of gas demarcates chromatograph;
Chromatograph is got above-mentioned SF after demarcating
6Gas sample 0.5mL uses syringe to be injected into the chromatograph from chromatographic notes sample mouth, calculates H in the gas sample according to Ci=CsiAi/Asi through chromatograph
2S, SO
2The content of gas that is to say less than 0.05 μ L/L, found micro-H in chromatogram
2S, SO
2Gas is according to standard: when gas content during less than 0.05 μ L/L, be considered as trace, can be used as qualitative discrimination.
The The above results explanation: may there be overheated and discharge fault in device interior.Sense cycle is foreshortened to 2 times/month by 1 time/month, carry out trace detection.
Embodiment 3
On April 16th, 2009, the on-the-spot SF that extracts in the electrical equipment of 220kV transformer station
6Gas sample 50mL; Selecting length for use is that the stainless-steel tube of 2m, internal diameter 3mm filling 60～80 order GDX-301 stationary phase is as chromatographic column.
Chromatographic column is put into gas chromatograph, and selection purity is carrier gas more than or equal to 99.99% hydrogen, and setting gas chromatograph TCD thermal conductivity detector (TCD) condition of work is: dry sound≤0.02mv; Drift≤0.25mv/min, post case, perfusor temperature are 80 ℃, detector temperature is 100 ℃, TCD decay * range: 1 * 0.05, the TCD hot-wire temperature is 180 ℃ ± 10 ℃; Heater current is: 100 ± 2mA;
Use syringe to inject and contain H from chromatographic notes sample mouth
2S, SO
2, N
2The mixing standard specimen gas 0.5mL of gas demarcates chromatograph;
Chromatograph is got above-mentioned SF6 gas sample 0.5mL after demarcating, and uses syringe to be injected into the chromatograph from chromatographic notes sample mouth, calculates H in the gas sample according to Ci=CsiAi/Asi through chromatograph
2S, SO
2The content of gas is respectively H
2S:1.5 μ L/L, SO
2: 3.6 μ L/L.
April 18 in 2009 is once more to the said equipment detection of taking a sample, H in the gas sample
2S, SO
2Gas content is respectively up to H
2S:8.1 μ L/L, SO
2: 13.2 μ L/L, its gas production rate is respectively H
2S:135%/the moon, SO
2: 435%/month, be far longer than for 10%/moon.
Presentation of results: may there be discharge fault in device interior moving contact part.
That afternoon is promptly to the detection of disintegrating of 220kV switch, finds that the pin hole that its moving contact is connected with pull bar is bigger than normal, makes pull bar produce the floating potential discharge.The strip inspection result is consistent with testing result.Because defective is in time detected, and has avoided the generation of accident.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, other modifications that those of ordinary skills make technical scheme of the present invention or be equal to replacement, only otherwise break away from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of the claim scope of the present invention.
Claims (3)
1. one kind is utilized gas chromatograph to detect SF
6The method of inside electric appliance fault is characterized in that: it comprises the steps:
Step 1: the stainless-steel tube of selecting filling 60～80 order GDX-301 stationary phase for use is as chromatographic column, and SF is extracted at the scene
6SF in the electrical equipment
650mL is standby for the gas sample;
Step 2: chromatographic column is put into gas chromatograph, and selecting hydrogen is carrier gas, and setting gas chromatograph TCD thermal conductivity detector (TCD) condition of work is: dry sound≤0.02mv; Drift≤0.25mv/min, post case, perfusor temperature are 80 ℃, detector temperature is 100 ℃, TCD decay * range: 1 * 0.05, the TCD hot-wire temperature is 180 ℃ ± 10 ℃; Heater current is: 100 ± 2mA;
Step 3: use syringe to inject and contain H from chromatographic notes sample mouth
2S, SO
2, N
2The mixing standard specimen gas 0.5mL of gas demarcates chromatograph;
Step 4: get the on-the-spot SF of extraction in the first step
6SF in the electrical equipment
6Gas sample 0.5mL uses syringe to be injected into the chromatograph from chromatographic notes sample mouth, and selected chromatographic computation schema, gas sample separate the back through chromatographic column and differentiate H by thermal conductance assessor
2S, SO
2Whether exist, and calculate H automatically according to following formula
2S, SO
2The content of gas:
Ci＝CsiAi/Asi
Ci: i component concentration in the gas sample
Csi: i component concentration in the gas
Ai: i component peaks area in the gas sample
Asi: i component peaks area in the gas;
Step 5: interpretation of result:
If do not detect H
2S, SO
2The existence of gas illustrates SF
6The electrical equipment safe operation;
If chromatograph detects H
2S, SO
2The trace of gas exists, and SF is described
6Electrical equipment has minor failure, needs to shorten sense cycle, grasps development trend;
If chromatograph detects H
2S, SO
2Gas exists, and, H
2S, SO
2The gas production rate of gas greater than 10%/month the time, just need SF
6The electrical equipment out-of-service inspection is in time removed a hidden danger, and guarantees equipment safety operation.
2. the gas chromatograph that utilizes according to claim 1 detects SF
6The method of inside electric appliance fault is characterized in that: the described stainless steel pipe range of step 1 2m, internal diameter 3mm.
3. the gas chromatograph that utilizes according to claim 1 detects SF
6The method of inside electric appliance fault is characterized in that: the purity of the described hydrogen of step 2 is more than or equal to 99.99%.
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| CN200910227268A CN101762655A (en) | 2009-12-03 | 2009-12-03 | Method for detecting internal fault of SF6 electrical equipment by using gas chromatograph |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101887093A (en) * | 2010-06-29 | 2010-11-17 | 河南省电力公司平顶山供电公司 | Method for detecting internal faults of SF6 electrical equipment by gas chromatography |
| CN102262194A (en) * | 2011-06-15 | 2011-11-30 | 中国科学院电工研究所 | Method for detecting internal faults of c-C4F8 mixed gas insulated electrical equipment |
| CN102901915A (en) * | 2012-10-11 | 2013-01-30 | 广西电网公司电力科学研究院 | System and method for online monitoring SO2 in SF6 electrical equipment through ultraviolet spectrum |
| CN102967671A (en) * | 2012-11-22 | 2013-03-13 | 湖南省电力公司科学研究院 | Device and method for detecting sulfur hexafluoride gas in oil immersed transformer |
| CN103063790A (en) * | 2011-10-20 | 2013-04-24 | 攀钢集团西昌钢钒有限公司 | Method for detecting hydrogen sulfide content in coal gas |
| CN103105441A (en) * | 2013-01-16 | 2013-05-15 | 海南电力技术研究院 | Qualitative and quantitative analysis method for sulfur hexafluoride (SF6) gas discharge decomposition product |
| CN107478965A (en) * | 2017-07-06 | 2017-12-15 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of direct-current wall bushing SF6Electric discharge solid product quantitative approach |
| CN111999130A (en) * | 2020-08-31 | 2020-11-27 | 重庆惠能标普科技有限公司 | Anti-oxidation absorption liquid for collecting sulfur dioxide and preparation method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887093A (en) * | 2010-06-29 | 2010-11-17 | 河南省电力公司平顶山供电公司 | Method for detecting internal faults of SF6 electrical equipment by gas chromatography |
| CN102262194A (en) * | 2011-06-15 | 2011-11-30 | 中国科学院电工研究所 | Method for detecting internal faults of c-C4F8 mixed gas insulated electrical equipment |
| CN102262194B (en) * | 2011-06-15 | 2013-10-16 | 中国科学院电工研究所 | Method for detecting internal faults of c-C4F8 mixed gas insulated electrical equipment |
| CN103063790A (en) * | 2011-10-20 | 2013-04-24 | 攀钢集团西昌钢钒有限公司 | Method for detecting hydrogen sulfide content in coal gas |
| CN103063790B (en) * | 2011-10-20 | 2015-04-29 | 攀钢集团西昌钢钒有限公司 | Method for detecting hydrogen sulfide content in coal gas |
| CN102901915B (en) * | 2012-10-11 | 2014-09-17 | 广西电网公司电力科学研究院 | System and method for online monitoring SO2 in SF6 electrical equipment through ultraviolet spectrum |
| CN102901915A (en) * | 2012-10-11 | 2013-01-30 | 广西电网公司电力科学研究院 | System and method for online monitoring SO2 in SF6 electrical equipment through ultraviolet spectrum |
| CN102967671A (en) * | 2012-11-22 | 2013-03-13 | 湖南省电力公司科学研究院 | Device and method for detecting sulfur hexafluoride gas in oil immersed transformer |
| CN102967671B (en) * | 2012-11-22 | 2014-06-11 | 湖南省电力公司科学研究院 | Device and method for detecting sulfur hexafluoride gas in oil immersed transformer |
| CN103105441B (en) * | 2013-01-16 | 2015-02-25 | 海南电力技术研究院 | Qualitative and quantitative analysis method for sulfur hexafluoride (SF6) gas discharge decomposition product |
| CN103105441A (en) * | 2013-01-16 | 2013-05-15 | 海南电力技术研究院 | Qualitative and quantitative analysis method for sulfur hexafluoride (SF6) gas discharge decomposition product |
| CN107478965A (en) * | 2017-07-06 | 2017-12-15 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of direct-current wall bushing SF6Electric discharge solid product quantitative approach |
| CN107478965B (en) * | 2017-07-06 | 2019-12-10 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Quantitative method for solid product discharged by DC wall bushing SF 6 |
| CN111999130A (en) * | 2020-08-31 | 2020-11-27 | 重庆惠能标普科技有限公司 | Anti-oxidation absorption liquid for collecting sulfur dioxide and preparation method thereof |
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Application publication date: 20100630 |