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Chitin-modified transformer insulating paper and its preparation method and application

A chitin and insulating paper technology, applied in transformer/inductor parts, transformer/inductor coils/windings/connections, insulators, etc., can solve problems such as low breakdown field strength, limited insulation, and insulation breakdown , to achieve the effect of simple equipment, prolong service life and improve insulation

Active Publication Date: 2017-12-19
WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Insulating paper is wound on each winding of the transformer and is a fixed insulating material. It cannot be replaced during the operation of the transformer. The current insulating paper uses ordinary kraft insulating paper, which has a low breakdown field strength and limited insulation. However Once an overvoltage is generated and exceeds the withstand voltage of the kraft insulating paper, an insulation breakdown accident will occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: a kind of chitin-modified transformer insulating paper preparation method comprises the steps:

[0027] Step 1: Prepare the dissolving solution, prepare the dissolving solution according to the weight ratio of water: sodium hydroxide: urea = 100:8:4;

[0028] Step 2: Prepare chitin solution, add a certain amount of chitin powder to the solution obtained in step 1 to prepare a solution with a concentration of 0.2% by mass, then freeze it at -30°C for 48 hours, take out the ice cubes and melt , the operation of melting ice cubes is to manually break the ice cubes into pieces, then put the pieces into a blender with a blade and stir them thoroughly, then freeze the melted solution again at -30°C for 48 hours, repeat The above freezing and thawing operations were performed twice until the chitin powder was completely dissolved to obtain a clear and transparent chitin solution;

[0029] Step 3: Coating, take a piece of insulating paper, apply the chitin soluti...

Embodiment 2

[0033] Embodiment 2: a kind of chitin-modified transformer insulating paper preparation method comprises the steps:

[0034] Step 1: Prepare the dissolving solution, prepare the dissolving solution according to the weight ratio of water: sodium hydroxide: urea = 100:8:4;

[0035] Step 2: Prepare chitin solution, add a certain amount of chitin powder to the solution obtained in step 1 to prepare a solution with a concentration of 0.8% by mass, then freeze at -30°C for 72 hours, take out the ice cubes and melt , the operation of melting ice cubes is to manually smash the ice cubes into pieces, then put the pieces into a blender with blades and stir them thoroughly, then freeze the melted solution again at -30°C for 72 hours, repeat The above freezing and thawing operations were performed 3 times until the chitin powder was completely dissolved to obtain a clear and transparent chitin solution;

[0036] Step 3: Coating, take a piece of insulating paper, and evenly apply the chit...

Embodiment 3

[0040] Embodiment 3: a kind of chitin-modified transformer insulating paper preparation method comprises the following steps:

[0041] Step 1: Prepare the dissolving solution, prepare the dissolving solution according to the weight ratio of water: sodium hydroxide: urea = 100:8:4;

[0042] Step 2: Prepare chitin solution, add a certain amount of chitin powder to the solution obtained in step 1 to prepare a solution with a concentration of 1.0% by mass, then freeze for 72 hours at a temperature of -30°C, and take out the ice cubes to melt , the operation of melting ice cubes is to manually smash the ice cubes into pieces, then put the pieces into a blender with blades and stir them thoroughly, then freeze the melted solution again at -30°C for 72 hours, repeat The above freezing and thawing operations were performed 3 times until the chitin powder was completely dissolved to obtain a clear and transparent chitin solution;

[0043] Step 3: Coating, take a piece of insulating pa...

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Abstract

The invention discloses chitin modified transformer insulation paper as well as a preparation method and application thereof. The preparation method of the chitin modified transformer insulation paper comprises the following steps: 1, preparing a dissolution liquid; 2, preparing a chitin solution; 3, coating; 4, prebaking; 5, drying. According to the invention, the transformer insulation paper is modified by adopting chitin, so that the insulating property of the insulation paper is improved, the service life can be effectively prolonged, the insulation failure rate can be reduced, the safety performance is high, and the economic benefits are obvious.

Description

technical field [0001] The invention relates to the technical field of insulating paper, in particular to a chitin-modified transformer insulating paper and a preparation method and application thereof. technical background [0002] In order to ensure the normal supply of electricity, it is necessary to ensure the safe, reliable and stable operation of the power grid. The collapse of the power grid will lead to large-scale power outages, which will not only bring great inconvenience to people's normal life, but also may cause safety accidents such as disorder, causing heavy losses to the country and society. The core equipment for energy conversion and transmission in the power grid is the power transformer, which plays a very important role in the entire power grid system. It is the key equipment for transmitting electric energy to all walks of life in the national economy and thousands of households. Therefore, once the power transformer fails during operation, it will be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H19/14D21H25/06D21H21/14H01F27/32D21H27/12
CPCD21H19/14D21H21/14D21H25/06H01B3/52H01F27/324
Inventor 周竹君金逸任彬叶菁
Owner WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST