CN114752245A - Preparation method of functional coating for surface insulation defect self-diagnosis and electric field intelligent regulation and control - Google Patents

Preparation method of functional coating for surface insulation defect self-diagnosis and electric field intelligent regulation and control Download PDF

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CN114752245A
CN114752245A CN202210248995.8A CN202210248995A CN114752245A CN 114752245 A CN114752245 A CN 114752245A CN 202210248995 A CN202210248995 A CN 202210248995A CN 114752245 A CN114752245 A CN 114752245A
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functional coating
electric field
insulation
coating
zinc sulfide
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CN114752245B (en
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李进
王禹淮
杜伯学
梁虎成
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Tianjin University
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/22—Luminous paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
    • C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D123/04—Homopolymers or copolymers of ethene
    • C09D123/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/24—Electrically-conducting paints
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3009—Sulfides
    • C08K2003/3036—Sulfides of zinc

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

The invention discloses a method for preparing a functional coating with the functions of self-diagnosis of insulation defects on an edge surface and intelligent regulation and control of an electric field, which comprises the following steps of selecting a zinc sulfide material with electroluminescence characteristics and semi-conduction characteristics, adding the zinc sulfide material into a polymer matrix, and preparing the functional coating with the functions of self-diagnosis of the insulation defects on the edge surface and intelligent regulation and control of the electric field, wherein the application range of the functional coating comprises the following steps: and power insulation parts such as a composite insulator of a power transmission line, a GIS/GIL insulator, a pulse power device vacuum insulation part, a wire insulation layer and the like. By changing the mass fraction of zinc sulfide and metal adulterants thereof in the functional coating and adjusting the surface conductivity of the functional coating, the electric insulating part with the functional coating can effectively identify whether the surface of the insulating part has defective insulation or not according to the light intensity distribution of the surface of the electric insulating part under the direct-current working condition, and simultaneously has the function of optimizing the surface electric field distribution of the insulating part.

Description

Preparation method of functional coating for surface insulation defect self-diagnosis and electric field intelligent regulation and control
Technical Field
The invention belongs to the field of insulation of high-voltage equipment, and particularly relates to a preparation method of a functional coating for surface insulation defect self-diagnosis and electric field intelligent regulation.
Background
The electrical equipment insulating part (a power transmission line composite insulator, a GIS/GIL insulator, a pulse power device vacuum insulation and a wire insulating layer) plays the roles of electrical insulation and mechanical support in the operation of electrical equipment and is a core component in the electrical equipment. The surface of the electric insulating part is easily subjected to surface insulation defects under the influence of factors such as production process limitation, operation and installation environment and the like. When the power equipment normally operates, the distortion degree of a local electric field on the surface of the insulating part with the surface insulation defect is too high, and the insulation fault of the power equipment is easily caused. Therefore, the problem that the existing insulation fault rate of the power equipment is effectively reduced by timely detecting the insulation part of the power equipment on line and finding the existing insulation defect along the surface is needed to be solved urgently at present.
The design has along face insulation defect self-diagnosis and electric field intelligent function regulation and control the electrical equipment insulating part of coating, and the electric field distribution on insulating part surface is carried out the representation with light intensity distribution when with electrical equipment normal operating, can diagnose its along face insulating state effectively through detecting insulating part surface light intensity distribution, and functional coating has along face electric field regulation and control function simultaneously, optimizes insulating part surface electric field distribution and effectively reduces the fault rate of electrical equipment operation. Therefore, the insulating part with the coating with the surface self-diagnosis and electric field intelligent regulation and control functions provides a new idea for the online monitoring of the insulating part of the power equipment.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method of a coating with the functions of self-diagnosis of insulation defects along the surface and intelligent regulation and control of an electric field.
The invention provides a preparation method of a functional coating with functions of self-diagnosis of insulation defects of an edge surface and intelligent regulation and control of an electric field.
The technical scheme provided by the invention is a preparation method of a functional coating with the functions of along-surface insulation defect self-diagnosis and electric field intelligent regulation and control, zinc sulfide materials with electroluminescence characteristics and semi-conduction characteristics are selected and added into a polymer matrix to prepare the functional coating with the functions of along-surface insulation defect self-diagnosis and electric field intelligent regulation and control, the surface conductivity of the functional coating is regulated by changing the mass fraction of zinc sulfide and metal dopants thereof in the functional coating, and an electric insulating part with the functional coating can identify whether the surface of the insulating part has defect insulation according to the light intensity distribution of the surface during normal operation, and has the function of optimizing the electric field distribution of the surface of the electric insulating part under the direct-current working condition.
Specifically, the suitable electric power insulating part of along face insulation defect self-diagnosis and electric field intelligent regulation function coating includes: the power transmission line composite insulator, the GIS/GIL insulator, the pulse power device vacuum insulation layer and the wire insulation layer.
Specifically, the polymer matrix selected for preparing the coating with the functions of self-diagnosis of the surface insulation defect and intelligent regulation and control of the electric field can be epoxy resin, silicon rubber, polyethylene and other insulating materials.
Specifically, the mass fraction of zinc sulfide filler in the coating with the surface insulation defect self-diagnosis and electric field intelligent regulation and control function is distributed in the range of 5-30%.
Specifically, the coating has the functions of self-diagnosis of the insulation defect of the edge surface and intelligent regulation and control of an electric field, and the coating process comprises coating, spraying, deposition and the like.
The method comprises the following steps:
(1) dividing the surface of the insulating part into a plurality of areas which are respectively marked as n based on the surface electric field distribution of the electric insulating part under the direct current working condition1、n2、n3.., marking the position of the surface of the electric power insulator with the surface insulation defect;
(2) uniformly mixing a polymer matrix and a curing agent in a mass ratio of 100:33 under a vacuum condition, adding a proper amount of zinc sulfide and metal dopants thereof after uniform mixing, and performing vacuum mixing operation to prepare a functional coating;
(3) Changing the addition mass fraction of zinc sulfide and metal dopants thereof, adjusting the surface conductivity of the functional coating, sequentially marking the prepared functional coating as m1, m2 and m3 … from large to small according to the surface conductivity, and sequentially coating the m1 functional coating on the n1Zone, m2 functional coating application at n2In the area …, the surface conductivity of the functional coating on the surface of the insulating part is distributed in a layered and partitioned manner after the coating is finished, so that the coating has the function of intelligent electric field regulation;
(4) and comparing light intensity distribution results of the normal position and the edge surface insulation defect position in the same region under the same working condition, and checking the self-diagnosis effect of the edge surface insulation defect of the coating.
The preparation process of the coating with the functions of self-diagnosis of the insulation defects on the edge surface and intelligent regulation and control of the electric field is as follows:
(1) pouring epoxy resin, a curing agent and an accelerator into a clean beaker according to the mass ratio of 100:33: 0.2;
(2) putting the mixture into a vacuum stirring cavity with the rotating speed of 90r/min, stirring for 15min, uniformly mixing the mixture and removing air in the mixture;
(3) after the mixture is uniformly mixed, adding zinc sulfide and related metal dopant, wherein the particle size of the zinc sulfide filler is 1 micron, the metal dopant is used for improving the electroluminescence effect of the zinc sulfide in the direct-current electric field, and stirring for 15min in a vacuum stirring cavity with the rotating speed of 90r/min to uniformly mix the zinc sulfide and the metal dopant and remove air in the mixture;
(4) And (4) repeating the step (3) after changing the adding mass ratio of the zinc sulfide and the metal dopant thereof, thus obtaining the coating with different surface conductivities.
Compared with the prior art, the invention has the beneficial effects that: the invention designs a functional coating which is suitable for surface insulation defect self-diagnosis and electric field intelligent regulation and control of an electric power insulation part under the direct current working condition, the functional coating has electroluminescence property and semi-conduction property, the surface insulation defect of the insulation part can be effectively identified according to the light intensity distribution result of the surface of the electric power insulation part under the direct current working condition, meanwhile, the functional coating has the electric field regulation and control function, the electric field distribution of the surface of the electric power insulation part coated with the functional coating is more uniform, and the probability of insulation fault caused by local electric field distortion is reduced. The invention provides a brand new method for detecting the surface insulation defect of the electric power insulation part and optimizing the surface electric field.
1. The polymer matrix of the functional coating can be made of insulating materials such as epoxy resin, silicon rubber, polyethylene and the like, has wide application range, and can be applied to power insulating parts such as power transmission line composite insulators, GIS/GIL insulators, pulse power device vacuum insulation, wire insulating layers and the like.
2. The surface conductivity of the functional coating is changed by regulating and controlling the mass ratio of the zinc sulfide filler in the functional coating, and the adding mass fraction of the zinc sulfide in the functional coating is 5-30%.
3. The functional coating coated on the surface of the electric insulating part has an electroluminescence characteristic, the state of the surface insulation is evaluated according to the light intensity detection result of the surface of the electric insulating part in actual operation, and meanwhile, the surface conductivity of the functional coating coated on the surface of the insulating part is distributed in a layered and partitioned manner, so that the surface electric field distribution of the electric insulating part under the direct-current working condition can be obviously optimized.
Drawings
FIG. 1 is a schematic diagram of the surface area division and along-plane defects of the basin-type insulator of the present invention;
FIG. 2 is a schematic view of the surface coating of the basin insulator of the present invention;
FIG. 3 is a schematic representation of the light intensity distribution on the surface of the basin-shaped insulator coated with different amounts of zinc sulfide when the same defect exists on the surface according to the present invention: (a) a basin insulator coated with a low zinc sulfide content coating; (b) a basin insulator coated with a high zinc sulfide content coating.
Detailed Description
The following further describes a method for preparing a coating with the functions of self-diagnosis of insulation defects along a surface and intelligent regulation and control of an electric field, which is provided by the invention, by combining with the accompanying drawings and specific embodiments.
Example 1
The invention aims to provide a preparation method of a coating with functions of self-diagnosis of insulation defects on an edge surface and intelligent regulation and control of an electric field. The specific implementation steps are as follows:
1) Adding CT-5531 type epoxy resin, polyimide resin HY-651 curing agent, RF-2-alpha type alumina filler and DMP-30 type accelerator into an epoxy vacuum casting device according to the mass ratio of 100:33:330:0.2 for uniform mixing and vacuumizing treatment, setting the temperature in a vacuum stirring cavity to be 100 ℃, setting the stirring time to be 30min, and injecting the mixture into a preheated basin-type insulating part mold after uniform mixing to prepare a basin-type insulating part;
2) according to the surface electric field distribution of the basin-type insulating part under the direct-current working condition, the surface of the formed basin-type insulating part is subjected to region division, meanwhile, the position of the insulating defect on the surface of the insulating part is marked, and the region division of the surface of the basin-type insulating part and the position of the insulating defect are shown in figure 1;
3) the preparation method of the coating with the functions of self-diagnosis of the insulation defects along the surface and intelligent regulation and control of the electric field is as follows:
(1) weighing 100g of CT-5531 type epoxy resin and polyimide resin HY-651 curing agent according to a mass ratio of 100:30, and placing the mixture in a vacuum stirring device, wherein the environmental temperature is set as follows: setting the stirring time to 10min and the rotating speed of the stirrer to 60r/min at 60 ℃;
(2) after stirring is finished, adding a mixture of zinc sulfide and copper powder with the mass fraction of 5%, and continuing to perform vacuum stirring operation under the same stirring operation conditions as in the step (1) to prepare a functional coating;
(3) Adjusting the adding mass fractions of the mixture of the zinc sulfide and the copper powder in the functional coating to be 10%, 15%, 20%, 25% and 30% respectively, repeating the step (2), and marking the prepared functional coating as m1, m2, m3, m4, m5 and m6 according to the surface conductivity from large to small;
4) coating m1, m2 and m3 in sequence on three areas of the basin-type insulating part according to the optimization scheme of the edge surface of the insulating part under the direct-current working condition to prepare the insulator coated with the low-content zinc sulfide coating; the coatings m4, m5 and m6 are sequentially coated on three areas of the basin-shaped insulating part to prepare the insulator coated with the high-content zinc sulfide coating, and the spraying mode is shown in figure 2.
5) Installing two functional coating basin-type insulators with different zinc sulfide contents coated on the surfaces into a GIL scaling test cavity, applying direct-current voltage to observe the light intensity distribution on the surfaces of the basin-type insulators, and evaluating the diagnosis of the edge surface insulation defects of the functional coatings and the intelligent regulation and control effect of an electric field, wherein the light intensity distribution results on the surfaces of the two basin-type insulators are shown in figure 3.
Example 2
The polymer matrix is selected from silicone rubber insulating material, sprayed into the insulating member, and the other steps are the same as example 1.
Example 3
The polymer matrix was selected from polyethylene insulation and deposited into the insulation using the same procedure as in example 1.

Claims (7)

1. The method for preparing the functional coating with the functions of self-diagnosis of the insulation defect of the edge surface and intelligent regulation and control of the electric field is characterized in that the functional coating is prepared by adding zinc sulfide filler with the characteristics of electroluminescence effect and semi-conduction into a polymer matrix and is uniformly attached to the surface of an insulating part of the power equipment, the insulation state of the edge surface of the insulating part can be effectively diagnosed by detecting the light intensity distribution of the surface of the insulating part, and meanwhile, the functional coating has the function of regulating and controlling the electric field of the edge surface.
2. The method for preparing the functional coating for surface insulation defect self-diagnosis and electric field intelligent regulation and control according to claim 1, is characterized by comprising the following steps of:
(1) based on the surface electric field distribution of the electric power insulating part under the direct current working condition, the electric power insulating part is insulatedThe surface of the piece is divided into a plurality of areas which are respectively marked as n1、n2、n3.., marking the position of the surface of the electric insulating part with the surface insulation defect;
(2) weighing a polymer matrix and a curing agent, mixing, putting the mixture in a vacuum stirring device, uniformly mixing, adding zinc sulfide and a metal dopant thereof, and carrying out vacuum mixing operation to prepare a functional coating;
(3) changing the addition mass fraction of zinc sulfide and metal dopants thereof, adjusting the surface conductivity of the functional coating, sequentially marking the prepared functional coating as m1, m2 and m3 … from large to small according to the surface conductivity, and sequentially coating the m1 functional coating on n 1Zone, m2 functional coating application at n2In the area …, the surface conductivity of the functional coating on the surface of the insulating part is distributed in a layered and partitioned manner after the coating is finished, so that the coating has the function of intelligent electric field regulation;
(3) and adjusting the adding mass fraction of the mixture of zinc sulfide and copper powder in the functional coating to be 5-30 percent respectively.
3. The method for preparing the functional coating for along-surface insulation defect self-diagnosis and electric field intelligent regulation and control according to claim 1 or 2, characterized in that the selected polymer matrix is epoxy resin, silicon rubber or polyethylene insulating material.
4. The method for preparing the functional coating for the surface insulation defect self-diagnosis and the electric field intelligent regulation and control according to claim 1 or 2, wherein the applicable insulation parts comprise a power transmission line composite insulator, a GIS/GIL insulator, a pulse power device vacuum insulation and a wire insulation layer.
5. The method for preparing the functional coating capable of realizing self diagnosis of the insulation defects along the surface and intelligently regulating and controlling the electric field according to the claim 1 or 2, wherein the selected coating process comprises coating, spraying and depositing.
6. The method for preparing the functional coating capable of realizing self diagnosis of the insulation defects along the surface and intelligently regulating and controlling the electric field according to claim 1 or 2, wherein the mass ratio of the polymer matrix to the curing agent is 100: 30.
7. The method for preparing the functional coating for self-diagnosis of insulation defects along the surface and intelligent regulation and control of an electric field according to claim 2, is characterized in that: the coating was prepared as follows
(1) Pouring epoxy resin, a curing agent and an accelerator into a clean beaker according to the mass ratio of 100:33: 0.2;
(2) putting the mixture into a vacuum stirring cavity with the rotating speed of 90r/min, stirring for 15min to uniformly mix the mixture and remove air in the mixture;
(3) after the mixture is uniformly mixed, adding zinc sulfide and related metal dopants, wherein the particle size of the zinc sulfide filler is 1 mu m, the metal dopants are used for improving the electroluminescent effect of the zinc sulfide in the direct-current electric field, and stirring for 15min in a vacuum stirring cavity with the rotating speed of 90r/min to uniformly mix the zinc sulfide and the related metal dopants and remove air in the mixture;
(4) and (4) repeating the step (3) after changing the adding mass ratio of the zinc sulfide and the metal dopant thereof, thus obtaining the coating with different surface conductivities.
CN202210248995.8A 2022-03-14 2022-03-14 Preparation method of functional coating for along-surface insulation defect self-diagnosis and electric field intelligent regulation and control Active CN114752245B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105829495A (en) * 2013-12-19 2016-08-03 联邦印制有限公司 Zinc Sulphide Phosphor Having Photo-And Electroluminescent Properties, Process For Producing Same, Security Document, Security Feature And Method For Detecting Same
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CN113793739A (en) * 2021-09-18 2021-12-14 合肥工业大学 Preparation method of surface conductivity gradient coating for direct-current GIL epoxy resin insulator

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Publication number Priority date Publication date Assignee Title
CN105829495A (en) * 2013-12-19 2016-08-03 联邦印制有限公司 Zinc Sulphide Phosphor Having Photo-And Electroluminescent Properties, Process For Producing Same, Security Document, Security Feature And Method For Detecting Same
US20200348238A1 (en) * 2017-10-30 2020-11-05 National Institute Of Advanced Industrial Science And Technology Electric conductivity-measuring material, electric conductivity-measuring film, electric conductivity-measuring device, and electric conductivity-measuring method, as well as electric resistivity-measuring material, electric resistivity-measuring film, electric resistivity-measuring device, and electric resistivity-measuring method
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