Method for improving interface insulating property of transformer oil-immersed paperboard

A technology for transformer oil and insulation performance, applied in the petroleum industry, additives, lubricating compositions, etc., can solve the problems of integrated development of transformer oil-impregnated cardboard interface, low electron mobility, safe and stable operation of transformers, and obstacles to miniaturization of transformers. , to prevent flashover along the surface, solve the breakdown voltage drop, improve safety and service life

Inactive Publication Date: 2020-05-08
TONGLING SANJIA TRANSFORMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, one of the reasons hindering the further miniaturization and integration of transformers is the problem of low electron mobility and insufficient insulation at the transformer oil-impregnated cardboard interface, which affects the safe and stable operation of transformers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for improving the interface insulation performance of transformer oil-immersed paperboard. The preferred solution is to add the prepared insulating modified nanomaterials to the transformer oil that has been filtered and removed to further prepare the oil-immersed paperboard to obtain insulation with stable overall performance. paper;

[0017] Specifically, it includes the following steps:

[0018] S1: Preparation of insulating modified nanomaterials:

[0019] (1) Weigh 9.3 g of silicon boride and place it in a beaker, add 130 ml of ethylene glycol and 10 ml of a 3.6% aqueous sodium acetate solution to the beaker, continue to stir for 30 minutes, and then add 2.6 g of polyethylene glycol , Ultrasonically mixed for 10 minutes, transferred to the autoclave, set the reaction temperature to 165°C, the reaction time to 20 hours, and the reaction pressure to 1.4MPa. After the reaction, pour the supernatant liquid and use deionized water and The water and ethanol were cent...

Embodiment 2

[0023] A method for improving the interface insulation performance of transformer oil-immersed paperboard is to add the prepared insulating modified nanomaterials to the transformer oil that has been filtered and decontaminated to further prepare the oil-immersed paperboard to obtain insulating paper with stable comprehensive performance;

[0024] Specifically, it includes the following steps:

[0025] Preparation of insulating modified nanomaterials:

[0026] (1) Weigh 9.4 g of silicon boride and place it in a beaker, add 140 ml of ethylene glycol and 12 ml of a 3.7% aqueous sodium acetate solution to the beaker, continue to stir for 35 minutes, and then add 2.7 g of polyethylene glycol , Ultrasonically mixed for 12 minutes, transferred to an autoclave, set the reaction temperature to 168°C, the reaction time to 22 hours, and the reaction pressure to 1.45MPa. After the reaction, pour the supernatant liquid and use deionized water and The water and ethanol were washed 4 times by cen...

Embodiment 3

[0030] A method for improving the interface insulation performance of transformer oil-immersed paperboard. The preferred solution is to add the prepared insulating modified nanomaterials to the transformer oil that has been filtered and removed to further prepare the oil-immersed paperboard to obtain insulation with stable overall performance. paper;

[0031] Specifically, it includes the following steps:

[0032] Preparation of insulating modified nanomaterials:

[0033] (1) Weigh 9.5 g of silicon boride and place it in a beaker, add 150 ml of ethylene glycol and 15 ml of sodium acetate aqueous solution with a mass concentration of 3.8% to the beaker, continue to stir for 40 minutes, and then add 2.8 g of polyethylene glycol , Ultrasonically mixed for 15 minutes, transferred to an autoclave, set the reaction temperature to 170°C, reaction time to 24 hours, and reaction pressure to 1.5MPa. After the reaction, pour the supernatant liquid and use deionized water and The water and eth...

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Abstract

The invention relates to the technical field of new material processing. The invention discloses a method for improving the interface insulating property of an oil-immersed paperboard of a transformer. In the method, the prepared insulation modified nano material is added into the transformer oil subjected to filtering and impurity removal for further preparation of oil-impregnated cardboard; theheat conductivity coefficient is increased by 16-18%, the dielectric loss is reduced by 54-55%, the electric conductivity is 10 <-8> - 10<-6> S / m, and the oil-immersed paper board can stand the test of high-strength polarization fatigue, so that the performance of a transformer is comprehensively improved, the safety of the transformer is improved, and the service life of the transformer is prolonged. The insulating property of the oil-immersed paperboard interface can be remarkably improved, so that the problem that the breakdown voltage is reduced due to addition of existing modified particles is solved, the insulating property of the oil-immersed paperboard interface is improved; meanwhile, the heat dissipation effect is good, the conductivity and dielectric loss are reduced, the application occasion of the oil-immersed paperboard interface is expanded, and the economic benefit and the safety benefit are remarkably improved.

Description

Technical field [0001] The invention belongs to the technical field of new material processing, and specifically relates to a method for improving the interface insulation performance of transformer oil-immersed cardboard. Background technique [0002] The transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, the secondary coil and the iron core (magnetic core). The main functions are: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), etc. According to the purpose, it can be divided into: power transformers and special transformers (electric furnace transformer, rectifier transformer, power frequency test transformer, voltage regulator, mining transformer, audio transformer, intermediate frequency transformer, high frequency transformer, impact transformer, instrument transformer, electronic transfor...

Claims

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Application Information

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IPC IPC(8): C10M125/02C10M125/26
CPCC10M125/02C10M125/26C10M2201/041C10M2201/10
Inventor 李新满徐江林周艳霞
Owner TONGLING SANJIA TRANSFORMER
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