CN101369481A - Application of TIII sheet paper in oil-immersed type transformer as low-dielectric constant insulation material - Google Patents

Application of TIII sheet paper in oil-immersed type transformer as low-dielectric constant insulation material Download PDF

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Publication number
CN101369481A
CN101369481A CNA2008100552529A CN200810055252A CN101369481A CN 101369481 A CN101369481 A CN 101369481A CN A2008100552529 A CNA2008100552529 A CN A2008100552529A CN 200810055252 A CN200810055252 A CN 200810055252A CN 101369481 A CN101369481 A CN 101369481A
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China
Prior art keywords
insulating
oil
tiii
transformer
dielectric constant
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Pending
Application number
CNA2008100552529A
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Chinese (zh)
Inventor
赵峰
李文平
刘东升
李洪秀
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Baoding Tianwei Group Co Ltd
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Baoding Tianwei Group Co Ltd
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Publication date
Application filed by Baoding Tianwei Group Co Ltd filed Critical Baoding Tianwei Group Co Ltd
Priority to CNA2008100552529A priority Critical patent/CN101369481A/en
Publication of CN101369481A publication Critical patent/CN101369481A/en
Pending legal-status Critical Current

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Abstract

The invention relates to an application of TIII paper board as low dielectric constant insulating material in oil-immersed transformer, a kind of new insulating material that is TIII type paper board with density of 0.89-0.91 g/<cm> and dielectric constant of 3.8-4.0 is adopted on a portion with high field strength and low mechanical strength requirement in the oil-immersed transformer, which can greatly reduce distribution of voltage in a transformer oil and reduce distribution of voltage in the insulating material, because the insulating strength of the insulating paper board is higher than that of the transformer oil, thereby making best use of the insulating strength of the insulating paper board and improving the insulating margin of the transformer oil at the same time to achieve the purpose of increasing the insulating strength of the whole insulating system. In our country, the first 750V transformer uses the paper of type TIII of the invention matching with the transformer oil, which greatly improves the insulating strength, the local discharge amount is only 30 pC, which is further lower than the average 100 pC using the traditional materials 500kV product at the same period, the effect is obvious.

Description

The TIII cardboard is as the application of low dielectric constant insulating material in oil-filled transformer
Technical field
The present invention relates to a kind of TIII cardboard as the application of low dielectric constant insulating material in oil-filled transformer.
Background technology
In oil-filled transformer, main insulating material is insulating board and transformer oil, typical insulation system adopts oil-partition structure, in AC field, voltage distribution in oil-paper insulation structure is inversely proportional to the dielectric constant of oil and paper, the dielectric constant that is material is big more, and wherein the voltage of Fen Peiing is more little.In order to improve mechanical strength, the density of the insulating board of choosing is generally (1.0-1.3) g/cm in the conventional art 3The cardboard model is TIV, its dielectric constant is about 4.6, and the dielectric constant of transformer oil is about 2.2, according to above voltage distribution principle, transformer oil has been born most voltage, and the dielectric strength of transformer oil is far below insulating board, causes distribute unbalanced with insulating material voltage allowable of voltage in the whole insulation system.
Summary of the invention
Technical problem to be solved by this invention is the high field intensity position at oil-filled transformer, propose adopting a kind of new insulating material is that model is that the cardboard of TIII matches with transformer oil, improve the Electric Field Distribution in the insulation system, improve the dielectric strength of insulation system.
The present invention is by the following technical solutions: the TIII cardboard is as the application of low dielectric constant insulating material in oil-filled transformer, and the present invention is at the high field intensity position of oil-filled transformer, and adopting a kind of density is 0.89-0.91g/cm 3, the use that matches with transformer oil of dielectric constant is 3.8-4.0, model is TIII cardboard, improve the Electric Field Distribution in the insulation system, improve the dielectric strength of insulation system.
Good effect of the present invention is as follows: based on described in the background technology in the paper oil insulation structure principle of voltage distribution, at the lower position of high field intensity, the requirement of mechanical strength of oil-filled transformer, adopt a kind of new insulating material, promptly model is the cardboard of TIII, and density is 0.89-0.91g/cm 3Dielectric constant is 3.8-4.0, can reduce voltage distribution in the transformer oil significantly, improve the voltage distribution in the insulating material, and since the dielectric strength of insulating board far above transformer oil, thereby make full use of the dielectric strength of insulating board, improve the insulation margin of transformer oil simultaneously, reach the purpose of the dielectric strength that improves whole insulation system.At first 750kV transformer application new material of the present invention of China is that model is that the paper of TIII matches with transformer oil, significantly improved dielectric strength, partial discharge quantity only is 30pC, and well below the partial discharge quantity of the average 100pC of same time employing traditional material 500kV product, effect is obvious.
Embodiment:
Embodiment 1: at the high field intensity position of oil-filled transformer, adopting a kind of new insulating material is that density is 0.89g/cm 3, the use that matches with transformer oil of dielectric constant is 3.8, model is TIII cardboard, improve the Electric Field Distribution in the insulation system, improve the dielectric strength of insulation system.
Embodiment 2: at the high field intensity position of oil-filled transformer, adopting a kind of new insulating material is that density is 0.91g/cm 3, the use that matches with transformer oil of dielectric constant is 4.0, model is TIII cardboard, improve the Electric Field Distribution in the insulation system, improve the dielectric strength of insulation system.
Embodiment 3: at the high field intensity position of oil-filled transformer, adopting a kind of new insulating material is that density is 0.90g/cm 3, the use that matches with transformer oil of dielectric constant is 3.9, model is TIII cardboard, improve the Electric Field Distribution in the insulation system, improve the dielectric strength of insulation system.

Claims (2)

1.TIII cardboard is as the application of low dielectric constant insulating material in oil-filled transformer.
2. TIII cardboard according to claim 1 is as the application of low dielectric constant insulating material in oil-filled transformer, and at the high field intensity position of oil-filled transformer, adopting a kind of density is 0.89-0.91g/cm 3, the use that matches with transformer oil of dielectric constant is 3.8-4.0, model is TIII cardboard, improve the Electric Field Distribution in the insulation system, improve the dielectric strength of insulation system.
CNA2008100552529A 2008-06-24 2008-06-24 Application of TIII sheet paper in oil-immersed type transformer as low-dielectric constant insulation material Pending CN101369481A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2008100552529A CN101369481A (en) 2008-06-24 2008-06-24 Application of TIII sheet paper in oil-immersed type transformer as low-dielectric constant insulation material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2008100552529A CN101369481A (en) 2008-06-24 2008-06-24 Application of TIII sheet paper in oil-immersed type transformer as low-dielectric constant insulation material

Publications (1)

Publication Number Publication Date
CN101369481A true CN101369481A (en) 2009-02-18

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CNA2008100552529A Pending CN101369481A (en) 2008-06-24 2008-06-24 Application of TIII sheet paper in oil-immersed type transformer as low-dielectric constant insulation material

Country Status (1)

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CN (1) CN101369481A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101702346B (en) * 2009-12-01 2011-05-04 江苏精达里亚阿尔岗琴工程线有限公司 Method for humidifying insulation paper
CN102723152A (en) * 2012-07-09 2012-10-10 重庆大学 Modifying method for improving puncture strength of cellulose insulation paper and insulation paper
CN104066887A (en) * 2012-01-20 2014-09-24 Abb技术有限公司 Cellulose based electrically insulating material
CN105259425A (en) * 2015-10-26 2016-01-20 西南交通大学 Method for testing relative dielectric constant of oil gap of transformer under low-frequency sine excitation
CN105301366A (en) * 2015-10-26 2016-02-03 西南交通大学 Transformer oil clearance complex capacitance test method under low frequency sine excitation
CN107800123A (en) * 2017-11-13 2018-03-13 北京交通大学 A kind of Main Insulation Structure of Electric apparatus and method of vertical high-temperature superconduction resistance-type current restrictor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101702346B (en) * 2009-12-01 2011-05-04 江苏精达里亚阿尔岗琴工程线有限公司 Method for humidifying insulation paper
CN104066887A (en) * 2012-01-20 2014-09-24 Abb技术有限公司 Cellulose based electrically insulating material
CN102723152A (en) * 2012-07-09 2012-10-10 重庆大学 Modifying method for improving puncture strength of cellulose insulation paper and insulation paper
CN105259425A (en) * 2015-10-26 2016-01-20 西南交通大学 Method for testing relative dielectric constant of oil gap of transformer under low-frequency sine excitation
CN105301366A (en) * 2015-10-26 2016-02-03 西南交通大学 Transformer oil clearance complex capacitance test method under low frequency sine excitation
CN105259425B (en) * 2015-10-26 2018-02-06 西南交通大学 The method of testing of the lower transformer oil clearance relative dielectric constant of low frequency sinusoidal excitation
CN107800123A (en) * 2017-11-13 2018-03-13 北京交通大学 A kind of Main Insulation Structure of Electric apparatus and method of vertical high-temperature superconduction resistance-type current restrictor

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Open date: 20090218