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High-voltage motor coil anti-corona structure repairing method based on nonlinear material

A technology of non-linear materials and anti-corona structures, applied in the shape/style/structure of winding insulation, winding insulation materials, manufacturing motor generators, etc., can solve problems such as long repair period, high repair cost, and poor repair quality. Achieve the effects of saving repair costs, avoiding demolition, and shortening the repair period

Pending Publication Date: 2022-02-08
HARBIN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This repair method leads to problems such as poor repair quality, long repair period, and high repair cost in the on-site repair of the stator coil.

Method used

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  • High-voltage motor coil anti-corona structure repairing method based on nonlinear material
  • High-voltage motor coil anti-corona structure repairing method based on nonlinear material
  • High-voltage motor coil anti-corona structure repairing method based on nonlinear material

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Embodiment Construction

[0029] The invention is a field repair method for stator coil insulation of a high-voltage motor, which includes the following process steps:

[0030] a. Preparation of anti-halation paint: the process is as follows figure 1 shown. Mix carbon nanotubes, polyaniline powder and polyurethane according to the above ratio and ultrasonically stir for 30 minutes. After mixing evenly, add epoxy resin heated to 60°C into the mixed solution according to the above ratio, place it in a sand mill, and add an appropriate amount of grinding The beads were dispersed at 2500rpm for 3 hours at high speed, and the dispersant and defoamer were added in the above ratio after dispersing for 2 hours, and the preparation of the anti-halation paint was completed at this time;

[0031] b. Clean the damaged part of the anti-halo structure of the coil: the damaged part of the anti-halo structure of the coil is as follows: figure 2 shown. Use a vacuum cleaner to clean the damaged part of the ring ant...

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Abstract

The invention discloses a high-voltage motor coil anti-corona structure repairing method based on a nonlinear material. According to the method, epoxy resin is used as a matrix to fill carbon nanotubes, polyaniline and the like to prepare a nonlinear corona-resistant material, and a damaged part of a coil anti-corona structure on a high-voltage motor accident site is repaired by a spraying and curing device, so that a stator winding can meet the requirement of long-term stable operation of a unit. Compared with a conventional method for repairing an anti-corona structure of a stator coil, the method provided by the invention has the advantages that the damaged part is repaired under the condition that the coil is not dismounted, the used nonlinear corona-resistant composite material has a good anti-corona effect and also ensures certain insulating property, the repaired anti-corona structure of the coil has integrity and excellent corona resistance, the partial discharge phenomenon caused by damage of the anti-corona structure is effectively avoided, a large amount of repair cost can be saved, the repair construction period is greatly shortened, and great economic benefits and social benefits are achieved.

Description

Technical field: [0001] The invention belongs to the technical field of high-voltage motor equipment insulation, and in particular relates to a method for repairing an anti-corona structure of a high-voltage motor coil. Background technique: [0002] The stator winding is one of the most important parts of the high-voltage motor, and its electrical performance is an important basis for measuring the quality of the high-voltage motor. Therefore, in actual engineering, a semi-conductive anti-corona layer is usually applied to the stator coil of the motor to reduce the corona phenomenon of the stator coil of the high-voltage motor, and to increase the corona inception voltage of the motor outlet, so that the stator coil of the motor does not Generate corona, even discharge and other phenomena, meet the anti-corona requirements, and ensure the safe operation of the unit. Through the research and development of nonlinear anti-corona materials and the improvement of the anti-coro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/40H02K3/30H02K15/12H02K15/00H01B3/40H01B3/30C09D163/00C09D7/61C09D7/65
CPCH02K3/40H02K3/30H02K15/12H02K15/0006H01B3/40H01B3/302C09D163/00C09D7/61C09D7/65C08L75/04C08L79/02C08K3/041
Inventor 池明赫王瑞鹏
Owner HARBIN UNIV OF SCI & TECH
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