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Charge injection inhibition method and device

A charge injection, cuprous oxide technology, applied in the field of power transmission and distribution equipment, can solve the problems of material dielectric performance decline and damage, and achieve the effect of improving insulation life and prolonging insulation life.

Active Publication Date: 2018-01-12
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It will destroy the organic chemical bonds in the material, and the macroscopic manifestation is that the local defects gradually expand, which makes the dielectric properties of the material decrease.

Method used

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  • Charge injection inhibition method and device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] An embodiment of the present invention provides a method for suppressing charge injection, and the method includes the following steps:

[0023] A cuprous oxide film is provided on the surface of the insulating material layer or the surface of the metal conductor by evaporation coating;

[0024] The insulating material layer coated with the cuprous oxide film or the metal conductor coated with the cuprous oxide film is insulated and covered on the surface of the current-carrying module of the high-voltage equipment.

[0025] Before forming the insulating material on the surface of the current-carrying part of the high-voltage equipment, a layer of cuprous oxide film is formed on the surface of the insulating material or metal conductor by magnetron sputtering coating or evaporation coating, and then the current-carrying part of the high-voltage equipment is passed Insulation covering on the surface of the module can form a layer of dense cuprous oxide film that fits tig...

Embodiment 2

[0027] see figure 1 , an embodiment of the present invention provides a method for suppressing charge injection, the method comprising the following steps:

[0028] A cuprous oxide film is provided on the surface of the insulating material layer or the surface of the metal conductor by evaporation coating;

[0029] The insulating material layer coated with the cuprous oxide film or the metal conductor coated with the cuprous oxide film is insulated and covered on the surface of the current-carrying module of the high-voltage equipment.

[0030] Optionally, the evaporating coating includes using a mechanical pump and a molecular pump group to evacuate the coating chamber, so that the pressure of the coating chamber is lower than 0.3Pa, and selecting a high-frequency induction heating source as the heat source for the cuprous oxide target, and setting the power as 1kW, the evaporation time is 1h~3h.

[0031] Optionally, the thickness of the cuprous oxide film includes 100nm-30...

Embodiment 3

[0038] see figure 1 , an embodiment of the present invention provides a device for suppressing charge injection, including the high-voltage equipment current-carrying module covered by insulation.

[0039] Optionally, the device includes a medium-high voltage AC / DC bushing or a medium-high voltage AC / DC cable.

[0040] Before the current-carrying part of the high-voltage equipment is wrapped and molded with insulating materials, poured, or three-layer co-extruded, a layer of thickness of 100nm~ For the 300nm cuprous oxide thin film, for samples that require large-area coating, a rotating substrate or multiple evaporation sources can be used to ensure the uniformity of the film layer; A tightly bonded cuprous oxide film is formed between the metal conductor and the insulation. The film can inhibit the injection of charge from the conductor during operation, and at the same time maintain the good insulation and mechanical properties of the electrical insulating material. It ca...

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Abstract

The invention relates to the technical field of power transmission and distribution equipment, in particular to a charge injection inhibition method and device. When a high-voltage electric applianceinsulating material operates under the action of a high electric field for a long time, charges are injected into an insulating medium by a partial high electric field, and the physical processes suchas charge injection and extraction occur continuously under the action of outside stress. An organic chemical key in a destroyed material is macroscopically expressed that partial defects are gradually expanded, and thus the dielectric property of the material is decreased. The charge injection inhibition method comprises the following steps that a cuprous oxide film is arranged on the surface ofan insulating material layer or the surface of a metal conductor by adopting evaporation coating, and the insulating material layer coated with the cuprous oxide film or the metal conductor coated with the cuprous oxide film covers the surface of a current-carrying module of high-voltage equipment in an insulating mode. By applying the method as the charge injection inhibition method, the insulating service life is prolonged, and the effect that the equipment operates safely is achieved.

Description

technical field [0001] The present application relates to the technical field of power transmission and distribution equipment, in particular to a method and device for suppressing charge injection. Background technique [0002] Dielectric composite materials have strong electrical insulation strength, excellent mechanical properties and low cost, and are widely used in the manufacture of insulation parts in the field of power transmission and distribution, as well as the main insulation of various high-voltage electrical equipment. At present, most medium and high-voltage motors and generators use polyimide film to wrap and wind the flat copper wire of the stator winding, and then use alkali-free glass fiber reinforced epoxy mica tape composite insulating material to form the winding. The final stator winding is wrapped, and after hot molding, it is used as the main insulation of the stator winding; the insulators in the gas-insulated electrical combination switch and the g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/24C23C14/08H01B7/02
Inventor 何顺马宏明程志万谭向宇
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST