CN106645531B - A kind of modification method of Gases Dissolved in Transformer Oil detection data - Google Patents
A kind of modification method of Gases Dissolved in Transformer Oil detection data Download PDFInfo
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- CN106645531B CN106645531B CN201611190386.2A CN201611190386A CN106645531B CN 106645531 B CN106645531 B CN 106645531B CN 201611190386 A CN201611190386 A CN 201611190386A CN 106645531 B CN106645531 B CN 106645531B
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- 239000007789 gas Substances 0.000 title claims abstract description 161
- 238000001514 detection method Methods 0.000 title claims abstract description 23
- 238000002715 modification method Methods 0.000 title claims abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 6
- 238000004445 quantitative analysis Methods 0.000 claims abstract description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 14
- 239000001257 hydrogen Substances 0.000 claims description 14
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 10
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 claims description 10
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 10
- 239000005977 Ethylene Substances 0.000 claims description 10
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 10
- 239000001569 carbon dioxide Substances 0.000 claims description 10
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 230000003252 repetitive effect Effects 0.000 claims description 5
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 230000010358 mechanical oscillation Effects 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 238000012797 qualification Methods 0.000 claims description 3
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 2
- 241000208340 Araliaceae Species 0.000 claims 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 1
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 1
- BFAKENXZKHGIGE-UHFFFAOYSA-N bis(2,3,5,6-tetrafluoro-4-iodophenyl)diazene Chemical compound FC1=C(C(=C(C(=C1F)I)F)F)N=NC1=C(C(=C(C(=C1F)F)I)F)F BFAKENXZKHGIGE-UHFFFAOYSA-N 0.000 claims 1
- 235000008434 ginseng Nutrition 0.000 claims 1
- 238000000205 computational method Methods 0.000 description 5
- 238000004817 gas chromatography Methods 0.000 description 5
- -1 hydrogen Chemical class 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010812 external standard method Methods 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/86—Signal analysis
- G01N30/8665—Signal analysis for calibrating the measuring apparatus
Abstract
The present invention relates to a kind of modification methods of Gases Dissolved in Transformer Oil detection data comprising following steps,（1）The sample of transformer oil when choosing transformer normal operation is normal oil sample sheet, and the sample of transformer oil when choosing transformer fault is failure oil sample sheet, is configured to calibrating gas respectively；（2）Use step（1）The normal oil standard gas and failure oil standard gas prepared, outer marking quantitative method is demarcated respectively using gas chromatograph in GB/T17623 1998 according to national standards；（3）Transformer oil to be measured is detected, the peak area of each gas component is measured from chromatogram,（4）Determine the concentration of each gas component in transformer oil sample pint outlet to be measured,（5）Determine the content of each gas component in transformer oil sample to be measured, result accuracy of the invention is high, can test the content of a variety of dissolved gas in transformer oil.
Description
Technical field
The present invention relates to a kind of modification methods of Gases Dissolved in Transformer Oil detection data.
Background technology
Transformer is one of the important electrical in electric system, it once breaks down, it will has serious consequences.
The analysis of Gases Dissolved in Transformer Oil constituent content is to monitor the most effective of transformer station high-voltage side bus situation in the energized state both at home and abroad
Means, therefore the accuracy of Gases Dissolved in Transformer Oil constituent content data directly determines the accurate of transformer state evaluation
Property.
The analysis of Gases Dissolved in Transformer Oil constituent content generally uses gas chromatography, acquires the oil in transformer first
Sample, then the dissolved gas in abjection oil, reuses each component content in gas chromatograph separation, detection abjection gas, leads to
Cross the concentration that each dissolved gas component in oil is calculated in data.The gas-chromatography first to using is needed during sample analysis
Instrument is demarcated, and calibrating gas external standard method is used in existing standard, i.e., uses one kind of known each component concentration before experiment every time
Normal mixture body demarcates instrument, and the peak area or peak height that each component is measured from obtained chromatogram carry out follow-up sample
Result when product are analyzed calculates.The normal mixture bulk concentration used in this method only one kind, and gas group in sample to be tested
Divide concentration indefinite, there have been single concentration standard mixed gas external standard methods cannot be applicable in waiting for for various concentration ranges well for this
The problem of surveying oil sample.Therefore, it is necessary to a kind of preferably mark fixed sum data computational methods.
Invention content
The object of the present invention is to provide a kind of modification methods of Gases Dissolved in Transformer Oil detection data, divide before testing
Not Xuan Qu transformer normal operation when and when failure transformer oil sample, be made according to the type of wherein characteristic gas and concentration
Calibrating gas carries out two point calibration to gas chromatograph, then passes through to the gas-chromatography diagram data of transformer oil sample product to be measured
Interpolation calculation obtains the content of each gas component in transformer oil sample to be measured, and as a result accuracy is high, can be in transformer oil
The content of a variety of dissolved gas is tested.
To achieve the above object, include the following steps,（1）The preparation of calibrating gas：Choose transformer normal operation time-varying
The sample of depressor oil is normal oil sample sheet, and the sample of transformer oil when choosing transformer fault is failure oil sample sheet, presses respectively
The gas concentration dissolved in normal oil sample sheet and failure oil sample sheet is configured to calibrating gas, each component in normal oil standard gas
It is a concentration ofc is1, each component is a concentration of in failure oil standard gasc is2；
Wherein：c is1The concentration of i components, uL/L in-normal oil standard gas；
c is2The concentration of i components, uL/L in-failure oil standard gas；
（2）Determine the peak area of calibrating gas：Use step（1）The normal oil standard gas and failure oil standard gas prepared
Body, outer marking quantitative method is demarcated respectively using gas chromatograph in GB/T17623-1998 according to national standards, is then distinguished
Measure each gas component peak area, the peak area of each gas component is A in normal oil standard gasis1, each gas of failure oil standard
The peak area of component is Ais2, under conditions of instrument stable conditions repetitive operation twice, repeatability average value ± 2% with
It is interior, take its average value、；
Wherein, Ais1The peak area of i components, mm in-normal oil standard gas2；
Ais2The peak area of i components, mm in-failure oil standard gas2；
The average peak area of i components, mm in-normal oil standard gas2；
The average peak area of i components, mm in-failure oil standard gas2；
（3）Transformer oil to be measured is detected：GB/T17623-1998 according to national standards, using mechanical oscillation method pair
The sample of transformer oil to be measured is de-gassed, and is analyzed abjection gas using gas chromatograph, is obtained chromatogram, and from color
The peak area A of each gas component is measured in spectrogrami, parallel sample detect twice, take each gas component peak area arithmetic mean of instantaneous value；
Wherein, AiThe peak area of i components, mm in-transformer oil sample to be measured2；
The average peak area of i components, mm in-transformer oil sample to be measured2；
（4）Determine the concentration of each gas component in transformer oil sample pint outlet to be measured：According to step（1）-（3）It obtains
Parameter, according to the following equation（1）Calculate the concentration of each gas component in transformer oil sample pint outlet to be measured：
（1）
Wherein：c iI concentration of component in-transformer oil sample pint outlet to be measured, uL/L；
（5）Determine the content of each gas component in transformer oil sample to be measured：According to step（4）The parameter obtained, according to
Following formula（2）-（4）Calculate the content of each gas component dissolved in transformer oil sample to be measuredX i：
Wherein：X iThe gas concentration of the i components dissolved in-transformer oil sample to be measured, uL/L；
PAtmospheric pressure when-detection, kPa；
K iThe distribution coefficient of domestic mineral insulation oil dissolved gas i components at -50 DEG C；
VgBalanced gas volume, mL under ' -50 DEG C, test pressure；
VlThe volume of the transformer sample to be measured extracted when ' -50 DEG C, mL；
Room temperature when t-detection, DEG C；
VgBalanced gas volume under-room temperature t, detection pressure, mL；
VlThe volume of the transformer sample to be measured extracted when-room temperature t, mL；
Preferably, step（1）In, normal oil sample sheet and this commission of failure oil sample are prepared into qualification with national standard gas
Mechanism be configured to calibrating gas by the characteristic gas type and concentration that are dissolved in normal oil sample sheet and failure oil sample sheet respectively.
Preferably, the group of the normal oil standard gas is divided into hydrogenc H2s1150 μ L/L, acetylenec C2H2s11 μ L/L, methanec CH4s120 μ L/L, ethylenec C2H4s110 μ L/L, ethanec C2H6s110 μ L/L, carbon monoxidec COs11000 μ L/L and carbon dioxidec CO2s1300 μ L/L, the group of the failure oil standard gas are divided into hydrogenc H2s2750 μ L/L, acetylenec C2H2s25 μ L/L, methanec CH4s2100 μ L/L, ethylenec C2H4s250 μ L/L, ethanec C2H6s250 μ L/L, carbon monoxidec COs24000 μ L/L, carbon dioxidec CO2s21000μL/L 。
Preferably, the step（2）In gas chromatograph should pass through national measurement mechanism examine and determine and before the deadline.
Good effect of the present invention is as follows：
The invention discloses a kind of modification methods of Gases Dissolved in Transformer Oil detection data, choose respectively before testing
The sample of transformer oil, Standard Gases are made according to the type of wherein characteristic gas and concentration when transformer normal operation and when failure
Body carries out two point calibration to gas chromatograph, then passes through interpolation method to the gas-chromatography diagram data of transformer oil sample product to be measured
The content of each gas component in transformer oil sample to be measured is calculated, solves single concentration standard gaseous mixture in the prior art
Body external standard method cannot be applicable in the problem of oil sample to be measured of various gas concentration ranges well.
The present invention is using two kinds of concentration standard gases of normal oil standard gas and failure oil standard gas to gas chromatograph
Two point calibration are carried out, interpolation method, that is, formula then is passed through to the gas-chromatography diagram data of transformer oil sample pint outlet to be measured（1）
Each gas component concentrations are calculated, finally utilize formula（2）-（4）Obtain each gas component in transformer oil sample to be measured
Content, of the invention two points of calibration and interpolation calculation single-point calibration than in the prior art and direct proportion, which calculate, to be had more extensively
Sample applicability, have effective raising to the calculating accuracy of unknown concentration sample detection data.
The method of the present invention detection is accurate, easy to use.On-line checking suitable for Gases Dissolved in Transformer Oil.
Specific implementation mode
It will make further narration in detail to the embodiment of the present invention below.
The present embodiment to Hebei Power Network, assess by some transformer oil sample, and specific implementation is as follows：
（1）The preparation of calibrating gas：The sample of transformer oil when choosing transformer normal operation is normal oil sample sheet, choosing
The sample of transformer oil when taking transformer fault, is failure oil sample sheet, presses dissolving in normal oil sample sheet and failure oil sample sheet respectively
Gas concentration be configured to calibrating gas, each component is a concentration of in normal oil standard gasc is1, each in failure oil standard gas
Component it is a concentration ofc is2；Normal oil sample sheet and this commission of failure oil sample are prepared to the mechanism point of qualification with national standard gas
Calibrating gas is not configured to by the characteristic gas type and concentration that are dissolved in normal oil sample sheet and failure oil sample sheet；
Wherein：c is1The concentration of i components, uL/L in-normal oil standard gas；
c is2The concentration of i components, uL/L in-failure oil standard gas；
In the present embodiment in normal oil standard gas：Hydrogenc H2s1150 μ L/L, acetylenec C2H2s11 μ L/L, methanec CH4s120μ
L/L, ethylenec C2H4s110 μ L/L, ethanec C2H6s110 μ L/L, carbon monoxidec COs11000 μ L/L and carbon dioxidec CO2s1300μL/
L。
Each component is a concentration of in failure oil standard gas：Hydrogenc H2s2750 μ L/L, acetylenec C2H2s25 μ L/L, methanec CH4s2100 μ L/L, ethylenec C2H4s250 μ L/L, ethanec C2H6s250 μ L/L, carbon monoxidec COs24000 μ L/L, carbon dioxidec CO2s21000μL/L。
（2）Determine the peak area of calibrating gas：Use step（1）The normal oil standard gas and failure oil standard gas prepared
Body, outer marking quantitative method is demarcated respectively using gas chromatograph in GB/T17623-1998 according to national standards, used
Gas chromatograph should pass through national measurement mechanism and examine and determine and before the deadline, then measure each gas component peak area respectively, just
The peak area of each gas component is A in normal oil standard gasis1, the peak area of each gas component of failure oil standard is Ais2, in instrument
Twice, repeatability takes its average value within ± the 2% of average value for repetitive operation under conditions of device stable conditions、；
Wherein, Ais1The peak area of i components, mm in-normal oil standard gas2；
Ais2The peak area of i components, mm in-failure oil standard gas2；
The average peak area of i components, mm in-normal oil standard gas2；
The average peak area of i components, mm in-failure oil standard gas2；
In the present embodiment, according to step（2）Method obtain each gas component peak area on spectrogram.
In normal oil standard gas：Repetitive operation twice, meets repeatability average under conditions of instrument stable conditions
Within ± the 2% of value, average value is hydrogen1867mm2, acetylene1159mm2, methane12423mm2, ethylene11959mm2, ethane11851mm2, carbon monoxide65055mm2, carbon dioxide36590mm2。
In failure oil standard gas：Repetitive operation twice, meets repeatability average under conditions of instrument stable conditions
Within ± the 2% of value, average value is hydrogen9338mm2, acetylene5795mm2, methane62118mm2, ethylene59796mm2, ethane255mm2, carbon monoxide260220mm2, carbon dioxide121969mm2。
（3）Transformer oil to be measured is detected：GB/T17623-1998 according to national standards, using mechanical oscillation method pair
The sample of transformer oil to be measured is de-gassed, and is analyzed abjection gas using gas chromatograph, is obtained chromatogram, and from color
The peak area A of each gas component is measured in spectrogrami, parallel sample detect twice, take each gas component peak area arithmetic mean of instantaneous value；
Wherein, AiThe peak area of i components, mm in-transformer oil sample to be measured2；
The average peak area of i components, mm in-transformer oil sample to be measured2；
In the present embodiment, environmental condition when transformer oil sample detection to be measured is：P=101.3 kPa, t=20 DEG C.Vl=
40 mL, Vg=3.0 mL measure the peak area of each gas component from chromatogram, show that transformer oil sample pint to be measured goes out gas
Each component peak area is in chromatogram：Hydrogen334mm2, acetylene20mm2, methane84958mm2, ethylene
4534mm2, ethane119717mm2, carbon monoxide175980 mm2, carbon dioxide112101mm2。
（4）Determine the concentration of each gas component in transformer oil sample pint outlet to be measured：According to step（1）-（3）It obtains
Parameter, according to the following equation（1）Calculate the concentration of each gas component in transformer oil sample pint outlet to be measured：
（1）
Wherein：c iI concentration of component in-transformer oil sample pint outlet to be measured, uL/L；
In the present embodiment, by taking hydrogen component as an example：
；
The computational methods of other components are identical as the computational methods of hydrogen, bring relevant parameter into formula（1）, differ herein
One enumerates.
（5）Determine the content of each gas component in transformer oil sample to be measured：According to step（4）The parameter obtained, according to
Following formula（2）-（4）Calculate the content of each gas component dissolved in transformer oil sample to be measuredX i：
Wherein：X iThe gas concentration of the i components dissolved in-transformer oil sample to be measured, uL/L；
PAtmospheric pressure when-detection, kPa；
K iThe distribution coefficient of domestic mineral insulation oil dissolved gas i components at -50 DEG C, this parameter is in GB/
There is list in T17623-1998, respective list can be consulted and obtained；
VgBalanced gas volume, mL under ' -50 DEG C, test pressure；
VlThe volume of the transformer sample to be measured extracted when ' -50 DEG C, mL；
Room temperature when t-detection, DEG C；
VgBalanced gas volume under-room temperature t, detection pressure, mL；
VlThe volume of the transformer sample to be measured extracted when-room temperature t, mL；
Environmental condition when transformer oil sample detection to be measured is：P=101.3 kPa, t=20 DEG C.Vl=40 mL, Vg=3.0
mL；
By taking hydrogen as an example, it is computed and obtains：
。
The computational methods of the present embodiment other components are identical as the computational methods of hydrogen, according to formula（2）-（4）It counts respectively
Calculation can show that each gas component concentrations are in transformer oil sample to be measured：3.52 μ L/L of hydrogen, 0.02 μ L/L of acetylene, methane
59.81 μ L/L, 5.43 μ L/L of ethylene, 854.47 μ L/L of 223.42 μ L/L of ethane, 504.47 μ L/L of carbon monoxide and carbon dioxide.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can in other embodiments be realized in the case where not departing from the spirit or scope of patent of the present invention.Therefore, originally
Invention is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein
Consistent widest range.
Claims (3)
1. a kind of modification method of Gases Dissolved in Transformer Oil detection data, it is characterised in that：Include the following steps,
(1) preparation of calibrating gas：The sample of transformer oil when choosing transformer normal operation is normal oil sample sheet, chooses and become
The sample of transformer oil when depressor failure is failure oil sample sheet, presses the gas dissolved in normal oil sample sheet and failure oil sample sheet respectively
Bulk concentration is configured to calibrating gas, a concentration of c of each component in normal oil standard gasis1, each component in failure oil standard gas
A concentration of cis2；
Wherein：cis1The concentration of i components, μ L/L in-normal oil standard gas；
cis2The concentration of i components, μ L/L in-failure oil standard gas；
The group of the normal oil standard gas is divided into hydrogen cH2s1150 μ L/L, acetylene cC2H2s11 μ L/L, methane cCH4s120μL/L、
Ethylene cC2H4s110 μ L/L, ethane cC2H6s110 μ L/L, carbon monoxide cCOs11000 μ L/L and carbon dioxide cCO2s1300 μ L/L, institute
The group for stating failure oil standard gas is divided into hydrogen cH2s2750 μ L/L, acetylene cC2H2s25 μ L/L, methane cCH4s2100 μ L/L, ethylene
cC2H4s250 μ L/L, ethane cC2H6s250 μ L/L, carbon monoxide cCOs24000 μ L/L, carbon dioxide cCO2s21000μL/L；
(2) peak area of calibrating gas is determined：The normal oil standard gas and failure oil standard gas prepared using step (1),
Outer marking quantitative method is demarcated respectively using gas chromatograph in GB/T17623-1998 according to national standards, is then measured respectively
Each gas component peak area, the peak area of each gas component is A in normal oil standard gasis1, each gas component of failure oil standard
Peak area be Ais2, twice, repeatability takes within ± the 2% of average value for repetitive operation under conditions of instrument stable conditions
Its average value
Wherein, Ais1The peak area of i components, mm in-normal oil standard gas2；
Ais2The peak area of i components, mm in-failure oil standard gas2；
The average peak area of i components, mm in-normal oil standard gas2；
The average peak area of i components, mm in-failure oil standard gas2；
(3) transformer oil to be measured is detected：GB/T17623-1998 according to national standards, using mechanical oscillation method to be measured
The sample of transformer oil is de-gassed, and is analyzed abjection gas using gas chromatograph, is obtained chromatogram, and from chromatogram
The middle peak area A for measuring each gas componenti, parallel sample detect twice, take each gas component peak area arithmetic mean of instantaneous value
Wherein, AiThe peak area of i components, mm in-transformer oil sample to be measured2；
The average peak area of i components, mm in-transformer oil sample to be measured2；
(4) concentration of each gas component in transformer oil sample pint outlet to be measured is determined：The ginseng obtained according to step (1)-(3)
Number, (1) calculates the concentration of each gas component in transformer oil sample pint outlet to be measured according to the following equation：
Wherein：ciI concentration of component in-transformer oil sample pint outlet to be measured, μ L/L；
(5) content of each gas component in transformer oil sample to be measured is determined：According to the parameter that step (4) obtains, according to following
Formula (2)-(4) calculate the content X of each gas component dissolved in transformer oil sample to be measuredi：
V′l=Vl[1+0·0008×(50-t)] (4)
Wherein：XiThe gas concentration of the i components dissolved in-transformer oil sample to be measured, μ L/L；
Atmospheric pressure when P-detection, kPa；
KiThe distribution coefficient of domestic mineral insulation oil dissolved gas i components at -50 DEG C；
VgBalanced gas volume, mL under ' -50 DEG C, test pressure；
VlThe volume of the transformer sample to be measured extracted when ' -50 DEG C, mL；
Room temperature when t-detection, DEG C；
VgBalanced gas volume under-room temperature t, detection pressure, mL；
VlThe volume of the transformer sample to be measured extracted when-room temperature t, mL.
2. a kind of modification method of Gases Dissolved in Transformer Oil detection data according to claim 1, it is characterised in that：
In step (1), the mechanism that normal oil sample sheet and this commission of failure oil sample are prepared to qualification with national standard gas is pressed just respectively
The characteristic gas type and concentration dissolved in normal oil sample sheet and failure oil sample sheet is configured to calibrating gas.
3. a kind of modification method of Gases Dissolved in Transformer Oil detection data according to claim 1, it is characterised in that：
Gas chromatograph in the step (2) should pass through national measurement mechanism and examine and determine and before the deadline.
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| CN103018355A (en) * | 2012-11-28 | 2013-04-03 | 国网电力科学研究院武汉南瑞有限责任公司 | Method and device for monitoring gas in transformer oil on line |
| CN105158356A (en) * | 2015-08-12 | 2015-12-16 | 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 | Method for separating helium and hydrogen in oil chromatography of converter transformer |
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| CN103018355A (en) * | 2012-11-28 | 2013-04-03 | 国网电力科学研究院武汉南瑞有限责任公司 | Method and device for monitoring gas in transformer oil on line |
| CN103018344A (en) * | 2012-12-07 | 2013-04-03 | 汉中供电局 | Calibrating method of color spectrum in oil on-line detecting device |
| CN105158356A (en) * | 2015-08-12 | 2015-12-16 | 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 | Method for separating helium and hydrogen in oil chromatography of converter transformer |
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