WO2013080267A1 - 油入電気機器の診断方法 - Google Patents
油入電気機器の診断方法 Download PDFInfo
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- WO2013080267A1 WO2013080267A1 PCT/JP2011/077330 JP2011077330W WO2013080267A1 WO 2013080267 A1 WO2013080267 A1 WO 2013080267A1 JP 2011077330 W JP2011077330 W JP 2011077330W WO 2013080267 A1 WO2013080267 A1 WO 2013080267A1
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- Prior art keywords
- oil
- filled electrical
- copper sulfide
- diagnosing
- risk
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 20
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 claims abstract description 88
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims abstract description 23
- 230000015556 catabolic process Effects 0.000 claims abstract description 19
- 150000001875 compounds Chemical class 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000011156 evaluation Methods 0.000 claims abstract description 10
- GVPWHKZIJBODOX-UHFFFAOYSA-N dibenzyl disulfide Chemical compound C=1C=CC=CC=1CSSCC1=CC=CC=C1 GVPWHKZIJBODOX-UHFFFAOYSA-N 0.000 claims description 62
- 230000019086 sulfide ion homeostasis Effects 0.000 claims description 47
- 230000005856 abnormality Effects 0.000 claims description 20
- 239000003112 inhibitor Substances 0.000 claims description 12
- 239000006227 byproduct Substances 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 238000002405 diagnostic procedure Methods 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000012298 atmosphere Substances 0.000 claims description 6
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 claims description 6
- 239000012964 benzotriazole Substances 0.000 claims description 4
- -1 benzotriazole compound Chemical class 0.000 claims description 4
- 238000003745 diagnosis Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- LUFPJJNWMYZRQE-UHFFFAOYSA-N benzylsulfanylmethylbenzene Chemical compound C=1C=CC=CC=1CSCC1=CC=CC=C1 LUFPJJNWMYZRQE-UHFFFAOYSA-N 0.000 claims description 3
- HTMQZWFSTJVJEQ-UHFFFAOYSA-N benzylsulfinylmethylbenzene Chemical compound C=1C=CC=CC=1CS(=O)CC1=CC=CC=C1 HTMQZWFSTJVJEQ-UHFFFAOYSA-N 0.000 claims description 3
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 claims description 3
- 230000007257 malfunction Effects 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 79
- 239000000123 paper Substances 0.000 description 34
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 17
- 101000823778 Homo sapiens Y-box-binding protein 2 Proteins 0.000 description 17
- 229910052802 copper Inorganic materials 0.000 description 17
- 239000010949 copper Substances 0.000 description 17
- 230000015572 biosynthetic process Effects 0.000 description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 229910052717 sulfur Inorganic materials 0.000 description 6
- 239000011593 sulfur Substances 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- BWFPGXWASODCHM-UHFFFAOYSA-N copper monosulfide Chemical compound [Cu]=S BWFPGXWASODCHM-UHFFFAOYSA-N 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004128 high performance liquid chromatography Methods 0.000 description 2
- 238000011896 sensitive detection Methods 0.000 description 2
- 150000003852 triazoles Chemical class 0.000 description 2
- QWUWMCYKGHVNAV-UHFFFAOYSA-N 1,2-dihydrostilbene Chemical group C=1C=CC=CC=1CCC1=CC=CC=C1 QWUWMCYKGHVNAV-UHFFFAOYSA-N 0.000 description 1
- DHTAIMJOUCYGOL-UHFFFAOYSA-N 2-ethyl-n-(2-ethylhexyl)-n-[(4-methylbenzotriazol-1-yl)methyl]hexan-1-amine Chemical compound C1=CC=C2N(CN(CC(CC)CCCC)CC(CC)CCCC)N=NC2=C1C DHTAIMJOUCYGOL-UHFFFAOYSA-N 0.000 description 1
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000010735 electrical insulating oil Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2835—Specific substances contained in the oils or fuels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2835—Specific substances contained in the oils or fuels
- G01N33/287—Sulfur content
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/404—Protective devices specially adapted for fluid filled transformers
Definitions
- the present invention evaluates the risk of copper sulfide generation that causes dielectric breakdown on insulating paper in an oil-filled electrical device such as a transformer in which coil copper wound with insulating paper is arranged in insulating oil,
- the present invention relates to a method for diagnosing the risk of occurrence of abnormality in oil-filled electrical equipment.
- coil insulation paper is wound around coil copper, which is a current-carrying medium, so that coil copper is not short-circuited between adjacent turns.
- the mineral oil used in the oil-filled transformer contains a sulfur component, and reacts with coil copper in the oil to produce conductive copper sulfide.
- this copper sulfide is generated on the surface of the insulating paper of the coil, since the copper sulfide is a conductive substance, a conductive path is formed starting from the place where the copper sulfide is deposited.
- problems such as short-circuiting between adjacent coil turns and causing dielectric breakdown (for example, Non-Patent Document 1 (CIGRE WG A2-32, “Copper sulphide in transformer insulation,” Final Report Brochure 378, 2009)).
- Non-Patent Document 2 F. Scatigio, V. Tumiatti, R. Maina , M. Tumiatti M. Pompilli and R. Bartnikas, “Corrosive Sulfur in Insulating Oils: Its Detection and Correlated Power Apparatus Failures”, IEEE Trans. Power Del., Vol. 23, pp. 508-509).
- Non-Patent Document 3 S. Toyama, J. Tanimura, N. Yamada, E. Nagao and T. Amimoto, “Highly Sensitive Detection Method of Dibenzyl (Disulfide and the Elucidation of the Mechanism of Copper Sulfide Generation in Insulating Oil ”, IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 16, No. 2, pp. 509-515, 2009.
- Non-Patent Document 4 T. Amimoto, E. Nagao, J. Tanimura, S. Toyama and N. Yamada, “Duration and Mechanism for Suppressive Effect of Triazole-based Passivators on Copper-sulfide Deposition on Insulating Paper”, IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 16, pp. 257. )).
- Patent Document 1 Japanese Patent Laid-Open No. 6-76635
- This formed film blocks and suppresses the reaction between dibenzyl disulfide and coiled copper, so that copper sulfide production can be suppressed (for example, Non-Patent Document 4).
- Insulating oils used in oil-filled electrical equipment such as transformers are generally large and have a long service life, so replacement is not easy. For this reason, in each oil-filled electrical device using insulating oil containing a sulfur component, there is a demand for a method for predicting the occurrence of abnormality such as dielectric breakdown caused by copper sulfide precipitation.
- the part where copper sulfide is generated in the oil-filled electrical equipment is generated not only on the coil insulating paper but also on the coil copper, PB (press board), etc., and the risk of occurrence of abnormality such as dielectric breakdown differs. For this reason, there is a problem that it is not possible to comprehensively evaluate the risk of occurrence of abnormalities occurring in oil-filled electrical equipment, even if the possibility of copper sulfide formation is predicted simply by measuring the causative substances such as dibenzyl disulfide. .
- An object of the present invention is to provide a diagnostic method capable of diagnosing the risk of occurrence of abnormality (insulation breakdown) in equipment with high accuracy.
- the diagnostic method according to the present invention includes 2,6-di-t-butyl-p-cresol that accelerates copper sulfide deposition on the surface of insulating paper in addition to conventional diagnostic items (such as the presence or absence of dibenzyl disulfide (DBDS)).
- DBDS dibenzyl disulfide
- the present invention is a method for diagnosing oil-filled electrical equipment for diagnosing the risk of occurrence of abnormality due to copper sulfide generation in the oil-filled electrical equipment, A first step of detecting a specific compound contained in the insulating oil in the oil-filled electrical device; Based on the detection result obtained in the first step, a second step for evaluating the possibility of copper sulfide generation at a dangerous site leading to dielectric breakdown in the oil-filled electrical device; A third step of diagnosing the risk of occurrence of abnormality in the oil-filled electrical device based on the evaluation result obtained in the second step,
- the specific compound is a method for diagnosing oil-filled electrical equipment, comprising dibenzyl disulfide and 2,6-di-t-butyl-p-cresol.
- the dangerous part is a surface of insulating paper applied to a coil winding surface.
- the specific compound preferably contains a by-product when copper sulfide is produced from dibenzyl disulfide.
- the by-product is preferably at least one compound selected from the group consisting of benzaldehyde, benzyl alcohol, bibenzyl, dibenzyl sulfide and dibenzyl sulfoxide.
- the specific compound preferably contains a copper sulfide formation inhibitor.
- the copper sulfide production inhibitor is preferably a benzotriazole compound.
- the presence or absence of detection of each of the specific compounds in the first step is evaluated for the possibility of copper sulfide generation at a dangerous site leading to dielectric breakdown in the oil-filled electrical device
- the third step when it is evaluated that the possibility of copper sulfide generation is high in the second step, it is preferable to diagnose that the risk of occurrence of abnormality in the oil-filled electrical device is high.
- the second step it is preferable to evaluate the possibility of copper sulfide generation in consideration of the presence or absence of oxygen in the atmosphere of the insulating oil.
- the second step it is preferable to evaluate the possibility of copper sulfide generation in consideration of the presence or absence of copper sulfide generation at the time of diagnosis.
- the diagnostic method according to the present invention evaluates the possibility of copper sulfide generation on the surface of insulating paper such as a coil immersed in insulating oil in oil-filled electrical equipment by using DBPC as a diagnostic item in addition to conventional diagnostic items. Therefore, it is possible to accurately diagnose the risk of occurrence of abnormality in the oil-filled electrical device.
- the present invention relates to a method for evaluating the risk of copper sulfide generation on insulating paper in such oil-filled electrical equipment and diagnosing the risk of occurrence of abnormality.
- DBPC is a substance that is sometimes added to insulating oil as an antioxidant.
- Fig. 1 shows the mechanism of copper sulfide generation inside oil-filled electrical equipment in the absence of air (nitrogen atmosphere).
- the copper sulfide production reaction is divided into two stages. In the first stage, a copper-DBDS complex (intermediate substance) is generated by a chemical reaction between copper and DBDS (cause substance). This complex diffuses into the insulating oil and part of it is adsorbed on the insulating paper. In the second stage, the complex is decomposed by thermal energy, so that copper sulfide is deposited on the insulating paper (for example, Non-Patent Document 3).
- copper sulfide is formed on the surface of insulating paper. After copper sulfide reacts with dibenzyl disulfide and coil copper, the reaction product diffuses in oil, adsorbs on the surface of insulating paper, and the product. Usually, it takes a very long time because it proceeds through thermal decomposition.
- DBPC in addition to the analysis result of DBDS or the like in insulating oil, DBPC is also used as an index to evaluate the possibility of copper sulfide generation on insulating paper, that is, the risk of dielectric breakdown.
- DBPC is also used as an index to evaluate the possibility of copper sulfide generation on insulating paper, that is, the risk of dielectric breakdown.
- the presence or absence of DBPC may be determined not only from the result of component analysis of the insulating oil but also from the brand of the insulating oil used.
- the diagnostic method of the present invention includes (1) a first step for detecting a specific compound contained in insulating oil in the oil-filled electrical device, and (2) based on the detection result obtained in the first step. And a second step for evaluating the possibility of copper sulfide generation at a hazardous site leading to dielectric breakdown in the oil-filled electrical device, and (3) the oil based on the evaluation result obtained in the second step. A third step of diagnosing the risk of occurrence of an abnormality in the input electrical equipment.
- the possibility of copper sulfide generation at a dangerous site leading to dielectric breakdown in the oil-filled electrical device is evaluated.
- the possibility of generation is high
- the specific compound includes at least dibenzyl disulfide (DBDS) and 2,6-di-t-butyl-p-cresol (DBPC), and at least detection (measurement) of both is performed in the first step.
- DBDS dibenzyl disulfide
- DBPC 2,6-di-t-butyl-p-cresol
- part which leads to the dielectric breakdown in an oil-filled electrical apparatus is the surface of the insulating paper given to the winding surface of a coil, for example.
- DBDS is used and decreases (see FIG. 2), and if the possibility of copper sulfide production is evaluated based only on the amount of DBDS, there is a possibility of erroneous evaluation. For this reason, it is preferable to evaluate the possibility of copper sulfide generation using not only DBDS but also by-products when copper sulfide is generated from DBDS as an index.
- by-products include benzaldehyde, benzyl alcohol, bibenzyl, dibenzyl sulfide, and dibenzyl sulfoxide.
- the possibility of copper sulfide generation differs depending on the presence or absence of copper sulfide generation inhibitors (BTA, etc.) and the difference in the atmosphere of the insulating oil (presence of oxygen). It is preferable to take this into account when evaluating the possibility.
- the specific compound preferably contains a copper sulfide production inhibitor.
- the copper sulfide production inhibitor is preferably a benzotriazole compound.
- the benzotriazole compound include 1,2,3-benzotriazole (BTA), Irgamet (registered trademark) 39 [N, N-bis (2-ethylhexyl)-(4 or 5) -methyl-1H-benzotriazole -1-methylamine: manufactured by BASF Japan Ltd.].
- the second step it is preferable to evaluate the possibility of copper sulfide formation in consideration of the presence or absence of oxygen in the insulating oil atmosphere, the presence or absence of copper sulfide and by-products at the time of diagnosis.
- the insulating oil collected from the oil-filled transformer is analyzed, and the possibility (risk) of copper sulfide generation is evaluated using the presence or absence of each evaluation parameter from the analysis result. Diagnose the risk of abnormality.
- the evaluation parameters are (1) Presence or absence of DBDS, (2) presence or absence of DBPC, (3) Presence or absence of copper sulfide formation inhibitor, (4) Presence or absence of oxygen in the upper space of the insulating oil surface, and (5) The five items of copper sulfide generation at the time of diagnosis or presence or absence of by-products accompanying copper sulfide generation were used.
- Each item can be detected with existing technology. For example, if a measuring instrument such as a gas chromatograph / mass spectrometer or HPLC (high performance liquid chromatography) is used, it can be quantified to about 1 ppmw.
- a measuring instrument such as a gas chromatograph / mass spectrometer or HPLC (high performance liquid chromatography) is used, it can be quantified to about 1 ppmw.
- Table 1 is a correspondence table for evaluating the possibility (risk) of copper sulfide generation on insulating paper of oil-filled electrical equipment.
- copper sulfide or by-product means item (5) above.
- the possibility (risk) of copper sulfide formation can be evaluated with high accuracy.
- the risk of occurrence of an abnormality in the oil-filled electrical device can be diagnosed with high accuracy in the same manner as this risk evaluation.
- DBDS dibenzyl disulfide
- DBPC 2,6-di-t-butyl-p-cresol
- sample oil A a mineral insulating oil that has been confirmed to contain no corrosive sulfur according to IEC62535 is prepared.
- 300 ppmw (w / w) DBDS was added to this transformer oil to obtain sample oil A.
- sample oil B prepared by adding 0.4 wt% (w / w) DBPC to sample oil A was also prepared.
- sample oil A and the sample oil B a test relating to the production of copper sulfide is performed by a method based on IEC 62535 of the IEC (International Electrotechnical Commission) standard.
- IEC 62535 IEC 62535 of the IEC (International Electrotechnical Commission) standard.
- a 15 CC sample oil and a copper plate (30 mm ⁇ 7.5 mm ⁇ 1.5 mm) wound with one layer of kraft paper (insulating paper) are sealed in a bottle having an internal volume of 30 cc.
- heating was performed at 150 ° C. for 72 hours.
- the air in the bottle is only nitrogen or a mixed gas of nitrogen and 2.5, 5, 10, or 20% by volume of oxygen. Replaced.
- Table 2 shows the evaluation results of the state of copper sulfide generation on the copper plate surface and insulating paper surface after the test.
- the state of copper sulfide production was evaluated visually based on the following criteria.
- a transformer using insulating oil added with DBDS and DBPC is high risk (high risk of occurrence of abnormality). Furthermore, it can be determined that the greater the amount of oxygen in the upper space of the insulating oil surface, the higher the risk of occurrence of abnormality in the transformer.
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Abstract
Description
前記油入電気機器内の絶縁油中に含まれる特定化合物を検出する第1ステップと、
前記第1ステップで得られた検出結果に基いて、前記油入電気機器内における絶縁破壊へ至る危険部位への硫化銅生成の可能性を評価する第2ステップと、
前記第2ステップで得られた評価結果に基いて、前記油入電気機器における異常発生の危険度を診断する第3ステップとを含み、
前記特定化合物は、ジベンジル・ジスルフィドおよび2,6-ジ-t-ブチル-p-クレゾールを含む、油入電気機器の診断方法である。
前記第3ステップにおいて、前記第2ステップで硫化銅生成の可能性が高いと評価された場合に、前記油入電気機器における異常発生の危険度が高いと診断することが好ましい。
本実施の形態では、油入変圧器から採取した絶縁油を分析し、その分析結果から各評価パラメータの有無を用いて、硫化銅生成の可能性(リスク)を評価し、油入電気機器の異常発生の危険度を診断する。評価パラメータは、
(1)DBDSの有無、
(2)DBPCの有無、
(3)硫化銅生成抑制剤の有無、
(4)絶縁油面上部空間中の酸素の有無、および、
(5)診断時点での硫化銅生成、または、硫化銅生成に伴う副生成物の有無の5項目とした。
A:硫化銅の生成なし
B:絶縁紙の端部にわずかに生成
C:Bよりもさらに広範囲に生成
D:全面に生成
Claims (9)
- 油入電気機器内における硫化銅生成による異常発生の危険度を診断する油入電気機器の診断方法であって、
前記油入電気機器内の絶縁油中に含まれる特定化合物を検出する第1ステップと、
前記第1ステップで得られた検出結果に基いて、前記油入電気機器内における絶縁破壊へ至る危険部位への硫化銅生成の可能性を評価する第2ステップと、
前記第2ステップで得られた評価結果に基いて、前記油入電気機器における異常発生の危険度を診断する第3ステップとを含み、
前記特定化合物は、ジベンジル・ジスルフィドおよび2,6-ジ-t-ブチル-p-クレゾールを含む、油入電気機器の診断方法。 - 前記危険部位は、コイルの巻き線表面に施された絶縁紙の表面である、請求項1に記載の油入電気機器の診断方法。
- 前記特定化合物は、ジベンジル・ジスルフィドから硫化銅が生成する際の副生成物を含む、請求項1または2に記載の油入電気機器の診断方法。
- 前記副生成物は、ベンズアルデヒド、ベンジルアルコール、ビベンジル、ジベンジルスルフィドおよびジベンジルスルホキシドからなる群から選択される少なくとも1種の化合物である、請求項3に記載の診断方法。
- 前記特定化合物は、硫化銅生成抑制剤を含む、請求項1~4のいずれかに記載の油入電気機器の診断方法。
- 前記硫化銅生成抑制剤はベンゾトリアゾール化合物である、請求項5に記載の油入電気機器の診断方法。
- 前記第2ステップにおいて、前記第1ステップで前記特定化合物の各々の検出の有無によって、前記油入電気機器内における絶縁破壊へ至る危険部位への硫化銅生成の可能性を評価し、
前記第3ステップにおいて、前記第2ステップで硫化銅生成の可能性が高いと評価された場合に、前記油入電気機器における異常発生の危険度が高いと診断する、請求項1~6のいずれかに記載の油入電気機器の診断方法。 - 前記第2ステップにおいて、前記絶縁油の雰囲気中における酸素の有無も考慮して、硫化銅生成の可能性を評価する、請求項1~7のいずれかに記載の油入電気機器の診断方法。
- 前記第2ステップにおいて、診断時点での前記硫化銅生成の有無も考慮して、硫化銅生成の可能性を評価する、請求項1~8のいずれかに記載の油入電気機器の診断方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2011/077330 WO2013080267A1 (ja) | 2011-11-28 | 2011-11-28 | 油入電気機器の診断方法 |
CN201180075139.7A CN103959409B (zh) | 2011-11-28 | 2011-11-28 | 油浸电气设备的诊断方法 |
JP2012526208A JP5079936B1 (ja) | 2011-11-28 | 2011-11-28 | 油入電気機器の診断方法 |
US14/241,336 US20140363893A1 (en) | 2011-11-28 | 2011-11-28 | Diagnosing method for oil-filled electrical equipment |
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JP2010192823A (ja) * | 2009-02-20 | 2010-09-02 | Mitsubishi Electric Corp | 油入電気機器および油入電気機器の硫化腐食防止方法 |
JP2011165851A (ja) * | 2010-02-09 | 2011-08-25 | Mitsubishi Electric Corp | 油入電気機器における硫化銅生成量の推定方法、異常発生の診断方法、絶縁油中のジベンジルジスルフィド初期濃度の推定方法、および、異常発生の可能性の診断方法 |
WO2011152177A1 (ja) * | 2010-06-02 | 2011-12-08 | 三菱電機株式会社 | 油入電気機器の診断方法および診断装置 |
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JPH0676635A (ja) * | 1992-08-31 | 1994-03-18 | Mitsubishi Electric Corp | 油入電気機器 |
JP3171225B2 (ja) * | 1995-09-07 | 2001-05-28 | 三菱電機株式会社 | 油入電気機器内部の異常診断方法 |
US6398986B1 (en) * | 1995-12-21 | 2002-06-04 | Cooper Industries, Inc | Food grade vegetable oil based dielectric fluid and methods of using same |
DE10316424A1 (de) * | 2003-04-09 | 2004-10-21 | Abb Patent Gmbh | Verfahren und System zur systematischen Evaluation von Bewertungskenngrössen technischer Betriebsmittel |
EP2214184A4 (en) * | 2007-10-26 | 2014-03-12 | Mitsubishi Electric Corp | METHOD FOR EXAMINING AN OIL-FILLED ELECTRICAL DEVICE |
JP2010010439A (ja) * | 2008-06-27 | 2010-01-14 | Mitsubishi Electric Corp | 油入電気機器における硫化銅生成の推定方法および異常を診断する方法 |
EP2372727A1 (en) * | 2008-12-25 | 2011-10-05 | Mitsubishi Electric Corporation | Method for predicting the probability of abnormality occurrence in oil-filled electrical apparatus |
JP4623334B1 (ja) * | 2009-12-24 | 2011-02-02 | 三菱電機株式会社 | 油入電気機器における異常発生の可能性を予測する方法 |
JP5516601B2 (ja) * | 2009-12-28 | 2014-06-11 | 三菱電機株式会社 | 油入電気機器における硫化銅生成量の推定方法、異常発生の診断方法、絶縁油中のジベンジルジスルフィド初期濃度の推定方法、および、異常発生の可能性の診断方法 |
JP5234440B2 (ja) * | 2010-02-17 | 2013-07-10 | 三菱電機株式会社 | 油入電気機器の寿命診断装置、油入電気機器の寿命診断方法、油入電気機器の劣化抑制装置、および油入電気機器の劣化抑制方法 |
JP2011246674A (ja) * | 2010-05-31 | 2011-12-08 | Mitsubishi Electric Corp | 電気絶縁油および油入電気機器 |
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- 2011-11-28 JP JP2012526208A patent/JP5079936B1/ja active Active
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JP2010192823A (ja) * | 2009-02-20 | 2010-09-02 | Mitsubishi Electric Corp | 油入電気機器および油入電気機器の硫化腐食防止方法 |
JP2011165851A (ja) * | 2010-02-09 | 2011-08-25 | Mitsubishi Electric Corp | 油入電気機器における硫化銅生成量の推定方法、異常発生の診断方法、絶縁油中のジベンジルジスルフィド初期濃度の推定方法、および、異常発生の可能性の診断方法 |
WO2011152177A1 (ja) * | 2010-06-02 | 2011-12-08 | 三菱電機株式会社 | 油入電気機器の診断方法および診断装置 |
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CN103959409A (zh) | 2014-07-30 |
JP5079936B1 (ja) | 2012-11-21 |
US20140363893A1 (en) | 2014-12-11 |
JPWO2013080267A1 (ja) | 2015-04-27 |
CN103959409B (zh) | 2016-09-28 |
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