CN102466667A - Silicon steel sheet quality analysis method based on transformer oil change - Google Patents
Silicon steel sheet quality analysis method based on transformer oil change Download PDFInfo
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- CN102466667A CN102466667A CN2010105353088A CN201010535308A CN102466667A CN 102466667 A CN102466667 A CN 102466667A CN 2010105353088 A CN2010105353088 A CN 2010105353088A CN 201010535308 A CN201010535308 A CN 201010535308A CN 102466667 A CN102466667 A CN 102466667A
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- transformer oil
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- oil
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- 239000003921 oil Substances 0.000 title claims abstract description 82
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 29
- 238000004458 analytical method Methods 0.000 title claims abstract description 24
- 238000012360 testing method Methods 0.000 claims abstract description 45
- 230000032683 aging Effects 0.000 claims abstract description 42
- 230000007797 corrosion Effects 0.000 claims abstract description 13
- 238000005260 corrosion Methods 0.000 claims abstract description 13
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 5
- 239000011593 sulfur Substances 0.000 claims abstract description 5
- 239000002253 acid Substances 0.000 claims description 15
- 238000009413 insulation Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 230000015556 catabolic process Effects 0.000 claims description 5
- 238000004868 gas analysis Methods 0.000 claims description 5
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 4
- 239000010779 crude oil Substances 0.000 claims description 4
- 150000001455 metallic ions Chemical class 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 4
- 238000003556 assay Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract 1
- 238000012795 verification Methods 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 239000002199 base oil Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004643 material aging Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention relates to a silicon steel sheet product, in particular to a quality analysis method of a silicon steel sheet for a transformer. A quality analysis method of silicon steel sheets based on transformer oil change comprises the following steps: selecting domestic and imported high-quality silicon steel sheets, and respectively manufacturing two samples with different sizes; meanwhile, naphthenic oil is selected as the test oil; and step two, carrying out an aging test: performing parallel analysis and comparison according to blank transformer oil before aging and blank transformer oil after aging and transformer oil plus silicon steel after aging; step three, carrying out a corrosion test: knowing the change condition of the surface of the silicon steel sheet, namely whether corrosive sulfur exists in mutual substances or not; and step four, analyzing and evaluating the quality of the domestic silicon steel sheet according to the data obtained by the tests in the step two and the step three. The invention can determine the influence of different silicon steel sheets on the transformer oil before and after aging, thereby making the verification of the quality of domestic silicon steel products to meet the requirements of the safety and the stability of the long-term operation of ultrahigh-voltage and large-capacity transformers.
Description
Technical field
The present invention relates to the siliconized plate product, relate in particular to transformer and use the siliconized plate mass analysis method.
Background technology
China has produced high name oriented silicon steel product; Just actively promote at present to UHV (ultra-high voltage) and high-power transformer; Need obtain relevant technical basis index before promoting; The technical indicator of (situation in the dry run and the condition of accelerated deterioration) on silicon steel and transformer oil compatibility is passed a judgement to the silicon steel product quality with this especially.The security and the stability of UHV (ultra-high voltage) and high-power transformer long-time running are even more important, but do not have the testing program of silicon steel and transformer oil compatibility at present both at home and abroad.
Summary of the invention
The present invention is intended to address the above problem, and a kind of siliconized plate mass analysis method that changes based on transformer oil is provided.The present invention can confirm the influence of the aging front and back of Different Silicon steel disc to transformer oil, thereby makes the checking of homemade silicon steel product quality, with security and the stable needs that adapt to UHV (ultra-high voltage) and high-power transformer long-time running.
The present invention is achieved in that a kind of siliconized plate mass analysis method that changes based on transformer oil, and it comprises:
Step 1 is selected the domestic and imported high-quality silicon steel sheet, makes the sample of two different sizes respectively; Select naphthene base crude oil as test oil simultaneously;
Step 2; Carry out aging test: put into selected transformer oil to a slice sample of making; It is that 115 ± 1 ℃ ageing oven constant temperature ventilated 72 hours that the transformer oil that sample will be housed is then put into temperature; It is aging to quicken simulation, by adding the aging laggard line data parallel analysis comparison of silicon steel with aging blank transformer oil in back and transformer oil before aging;
Step 3 is carried out corrosion test: another sheet sample is hung in the transformer oil, and be immersed in fully in the oil, under following two kinds of test conditions, carry out corrosion test and 1. in 100 ± 2 ℃ constant temperature oven, kept 3 hours; 2. kept 72 hours in 105 ± 2 ℃ the constant temperature oven; Understand siliconized plate changes in surface situation, promptly whether material exists active sulfur to the metal surface role each other;
Step 4, according to the data of step 2 and step 3 test acquisition, the quality of the homemade siliconized plate of assay, even each item test figure result is approaching, thinks that then the quality of two kinds of siliconized plate products is suitable.
The described siliconized plate mass analysis method that changes based on transformer oil, the project of being tested in the said step 2 comprises: dissolved gas analysis, acid value measuring analysis, water soluble acid analysis, breakdown voltage test, dielectric dissipation factor and specific insulation, interfacial tension, greasy filth are separated out metallic ion mensuration in test and the oil.
The present invention carries out compatibility test with different places of production siliconized plate with different transformer oil before and after aging; Compare and analyze through the physical quantity in the transformer oil and the data of chemistry amount and electric parameters; The silicon steel product of evaluation different manufacturers is made the checking of silicon steel product quality.
Embodiment
A kind of siliconized plate mass analysis method that changes based on transformer oil, it comprises:
Step 1 is selected the domestic and imported high-quality silicon steel sheet, makes the sample of two different sizes respectively; Select naphthene base crude oil as test oil simultaneously;
Step 2; Carry out aging test: put into selected transformer oil to a slice sample of making; It is that 115 ± 1 ℃ ageing oven constant temperature ventilated 72 hours that the transformer oil that sample will be housed is then put into temperature; It is aging to quicken simulation, by adding the aging laggard line data parallel analysis comparison of silicon steel with aging blank transformer oil in back and transformer oil before aging; The project of being tested comprises: dissolved gas analysis, acid value measuring analysis, water soluble acid analysis, breakdown voltage test, dielectric dissipation factor and specific insulation, interfacial tension, greasy filth are separated out metallic ion mensuration in test and the oil.
Step 3 is carried out corrosion test: another sheet sample is hung in the transformer oil, and be immersed in fully in the oil, under following two kinds of test conditions, carry out corrosion test and 1. in 100 ± 2 ℃ constant temperature oven, kept 3 hours; 2. kept 72 hours in 105 ± 2 ℃ the constant temperature oven; Understand siliconized plate changes in surface situation, promptly whether material exists active sulfur to the metal surface role each other;
Step 4, according to the data of step 2 and step 3 test acquisition, the quality of the homemade siliconized plate of assay, even each item test figure result is approaching, thinks that then the quality of two kinds of siliconized plate products is suitable.
Embodiment:
Siliconized plate specific requirement and size
(1) homemade siliconized plate, Japanese Nippon Steel siliconized plate
(2) the Different Silicon steel disc is each 2
Transformer oil
This scheme is selected that transformer oil mainly considers to be used in the use on UHV (ultra-high voltage) and the high-power transformer, at first consider internationally renowned brand and homemade Premium Brands, and the base oil of will loading is that naphthene base crude oil is main.Japanese high insulating oil and homemade KI25X (Kelamayi, Xinjiang refinery) are adopted in this test.Calculate the consumption in the actual tests, each trade mark transformer oil needs 1000ml approximately.
Aging test
Test objective
With reference to " moving the aging determination method of oily open cup " is DL429.6-91; Through putting into siliconized plate in the 450ml transformer oil; It is that 115 ± 1 ℃ ageing oven constant temperature ventilated 72 hours that the transformer oil that siliconized plate will be housed is then put into temperature; As quickening the aging means of simulation, then transformer oil before and after aging is analyzed.Testing requirements
With reference to " moving the aging determination method of oily open cup " is DL429.6-91, and requires to hang in the transformer oil at siliconized plate, and is immersed in fully in the oil, gives full play to the maximum contact area.By adding the aging laggard line data parallel analysis comparison of silicon steel with aging blank transformer oil in back and transformer oil before aging.
Analysis project and purpose
Dissolved gas analysis (GB/T17623) [μ l/L] silicon steel under aging high temperature contacts with oily, causes that gas content changes in the oil, and particularly the variation of hydrogen is the important indicator as transformer inside latency fault.
Acid number (GB/T264) [mgKOH/g] acid number reflection oil refining and with the silicon steel high temperature ageing after organic acid and the summation of mineral acid; Contained acid product can make the electric conductivity of oil increase in the oil; Reduce the insulating property of oil; When running temperature is higher (as more than 80 ℃) also can impel solid fiber matter insulating material aging and cause corrosion, shorten service life of equipment.Because acid number can reflect the oil ageing situation in the oil, so acid number is an important indicator of transformer oil.
The initial stage generally is prone to generate low molecular organic acids after water soluble acid (DL429.3-91) [PH] transformer oil ageing; Like formic acid, acetate etc., because these sour water dissolubilities are better, when W/O dissolubility acid content increases; When containing water again in the oil; Can make solid insulating material and metal produce corrosion, and reduce the insulating property of electrical equipment, so water soluble acid judges that aging effect of transformer oil initial stage is sensitive.
The voltage breakdown of voltage breakdown (DL429.9) [KV] transformer oil is a check transformer oil tenability limit electric stress situation, is a very important supervision means.
Generating polar material after dielectric dissipation factor (GB/T5654) [%], specific insulation (GB/T5654) [Ω M] transformer oil ageing may make transformer electrolytic polarization and electricity lead and cause energy loss and heating.Dielectric dissipation factor and specific insulation are very responsive to the reaction that has solubility polar impurity, ageing products and charged colloidal particle etc. in the transformer oil, so the mensuration of dielectric dissipation factor and specific insulation is the conventional means of transformer oil inspection and supervision.
How much relevant the size of interfacial tension (GB/T6541) [mN/m] interfacial tension is with the polar material in the transformer oil.
It is that inspection operating transformer oil still is under dissolving or the colloidal state when adding normal heptane that greasy filth is separated out (DL429.7) this method, and sludge deposition thing that can precipitating is come out from oil, the sediment of separating out are the primary products of the aging and influence heat radiation of solid insulation.
The latency of metallic ion metal pair transformer oil is polluted in the oil, is the catalyzer that causes the accelerated deterioration of oil product deterioration, and dielectric loss increase and interfacial tension are reduced, through analyzing the metal pair oil pollution situation of reflection surface of silicon steel oxide layer.
Corrosion test
Test objective: transformer oil being contacted with siliconized plate at a certain temperature, after the certain hour effect, understand siliconized plate changes in surface situation, mainly is whether mutual material exists active sulfur to the metal surface role.
Analyze explanation: with reference to DL429.8 determination of corrosion method; Siliconized plate hangs in the transformer oil; And be immersed in fully in the oil, give full play to the maximum contact area, under following two kinds of test conditions, carry out corrosion test: 1. in 100 ± 2 ℃ constant temperature oven, kept 3 hours; 2. kept 72 hours in 105 ± 2 ℃ the constant temperature oven.
Dissolved gas analysis unit: μ l/L
(2) physico-chemical analysis
(3) corrosion test
(4) spectral analysis unit: μ g/g
Digestion time: 72h
The fluctuating error of above test figure comes from due to measuring error and the open high temperature ageing error, and its error information fluctuation is less, aspect measurement, can accept.
Test evaluation
From the data analysis of above-mentioned each item test findings, two types siliconized plate after accelerated deterioration, all kinds of physics, electric, the chemical property index is approaching.Therefore can think the siliconized plate basically identical that the siliconized plate of homemade production is produced with Japan on the physics different transformer oil under, electric, chemical property, not obviously fluctuation and suddenling change.
Claims (2)
1. siliconized plate mass analysis method that changes based on transformer oil is characterized in that it comprises:
Step 1 is selected the domestic and imported high-quality silicon steel sheet, makes the sample of two different sizes respectively; Select naphthene base crude oil as test oil simultaneously;
Step 2; Carry out aging test: put into selected transformer oil to a slice sample of making; It is that 115 ± 1 ℃ ageing oven constant temperature ventilated 72 hours that the transformer oil that sample will be housed is then put into temperature; It is aging to quicken simulation, by adding the aging laggard line data parallel analysis comparison of silicon steel with aging blank transformer oil in back and transformer oil before aging;
Step 3 is carried out corrosion test: another sheet sample is hung in the transformer oil, and be immersed in fully in the oil, under following two kinds of test conditions, carry out corrosion test and 1. in 100 ± 2 ℃ constant temperature oven, kept 3 hours; 2. kept 72 hours in 105 ± 2 ℃ the constant temperature oven; Understand siliconized plate changes in surface situation, promptly whether material exists active sulfur to the metal surface role each other;
Step 4, according to the data of step 2 and step 3 test acquisition, the quality of the homemade siliconized plate of assay, even each item test figure result is approaching, thinks that then the quality of two kinds of siliconized plate products is suitable.
2. the siliconized plate mass analysis method that changes based on transformer oil according to claim 1; It is characterized in that the project of being tested in the said step 2 comprises: dissolved gas analysis, acid value measuring analysis, water soluble acid analysis, breakdown voltage test, dielectric dissipation factor and specific insulation, interfacial tension, greasy filth are separated out metallic ion mensuration in test and the oil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105353088A CN102466667A (en) | 2010-11-08 | 2010-11-08 | Silicon steel sheet quality analysis method based on transformer oil change |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105353088A CN102466667A (en) | 2010-11-08 | 2010-11-08 | Silicon steel sheet quality analysis method based on transformer oil change |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564930A (en) * | 2010-12-17 | 2012-07-11 | 鞍钢股份有限公司 | Method for detecting corrosion resistance of surface of electrical steel |
| CN105403500A (en) * | 2015-10-28 | 2016-03-16 | 九江学院 | Electric method for evaluating pitting resistance of metal material |
| CN115683992A (en) * | 2022-11-01 | 2023-02-03 | 国网四川省电力公司电力科学研究院 | A research system and method for transformer oil corrosive sulfur and aging |
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2010
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| JP2009109475A (en) * | 2007-10-12 | 2009-05-21 | Jfe Steel Corp | Method for evaluating corrosion resistance of surface-treated steel sheets |
| CN101408578A (en) * | 2008-11-21 | 2009-04-15 | 重庆大学 | Multiple factors accelerated aging test apparatus and method for oil paper insulation of transformer |
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Non-Patent Citations (3)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564930A (en) * | 2010-12-17 | 2012-07-11 | 鞍钢股份有限公司 | Method for detecting corrosion resistance of surface of electrical steel |
| CN102564930B (en) * | 2010-12-17 | 2014-03-12 | 鞍钢股份有限公司 | Method for detecting corrosion resistance of surface of electrical steel |
| CN105403500A (en) * | 2015-10-28 | 2016-03-16 | 九江学院 | Electric method for evaluating pitting resistance of metal material |
| CN115683992A (en) * | 2022-11-01 | 2023-02-03 | 国网四川省电力公司电力科学研究院 | A research system and method for transformer oil corrosive sulfur and aging |
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Application publication date: 20120523 |