CN108732067A - A kind of evaluation method based on the grey close Hydrophobicity of Composite Insulator of salt - Google Patents
A kind of evaluation method based on the grey close Hydrophobicity of Composite Insulator of salt Download PDFInfo
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- CN108732067A CN108732067A CN201810402043.0A CN201810402043A CN108732067A CN 108732067 A CN108732067 A CN 108732067A CN 201810402043 A CN201810402043 A CN 201810402043A CN 108732067 A CN108732067 A CN 108732067A
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Abstract
This application provides a kind of evaluation method based on the grey close Hydrophobicity of Composite Insulator of salt, the application evaluates basis using the migration of hydrophobicity of composite insulator as hydrophobicity, and it is CaCl to stain with salt2With NaCl mixtures, wherein Ca2+There is larger inhibition to the migration of hydrophobicity of silicon rubber, the migration of hydrophobicity of evaluation silicon rubber is removed with more harsh condition, it is more advantageous to and selects the good insulator of hydrophobicity, recommend heavily contaminated area equivalent salt density simultaneously, the close numerical value of ash, optimize composite insulator migration of hydrophobicity evaluation method, solves the insulator problem of selecting in the heavy pollution area of salinity complexity, insulator can be selected to provide effective guidance for the heavy pollution area of salinity complexity, ensure that the composite insulator that the dirty area of the weight of unidentified pollution sources is selected can play the role of antifouling work, prevent the generation of transmission line of electricity pollution flashover accident, safeguard transmission line safety stable operation.
Description
Technical field
The present invention relates to ultra-high-tension power transmission line external insulation technical field, more particularly, to it is a kind of based on salt ash it is close it is compound absolutely
The evaluation method of edge hydrophobicity.
Background technology
Since the 1980s at the beginning of 21 century, topical regional occurs for China's power grid and large area blackout is total
68.Because what regional pollution flashover and large area pollution flashover caused has 29, what substation and power plant high voltage station pollution flashover caused has 3
It rises, the two accounts for the 47% of total frequency of power cut.The usual multiple spot of pollution flashover occurs simultaneously, and reclosing should not succeed and cause circuit and power transformation
It stands permanent earth accident.Prevent the generation of grid pollution flashover accident, the reliability of power grid operation can be greatly improved.Prevent
Pollution flashover accident needs to configure appropriate external insulation, for the heavy pollution area of salinity complexity, selects anti-fouling flashover performance excellent
Different insulator is even more important.
Pollution flashover refer to insulation of electrical installation surface attachment dunghill in humid conditions, soluble substance is gradually dissolved in
Water forms one layer of conductive film in insulating surface, so that the dielectric level of insulator is substantially reduced, what is occurred under electric power field action is strong
Strong electric discharge phenomena.
Hydrophobicity makes surface of composite insulator not moisture-sensitive, the moisture of absorption exist in the form of isolated droplet, not shape
At continuous moisture film its flashover voltage is improved to inhibit the leakage current of surface of composite insulator.In harsh service condition
Under, insulator surface can become hydrophilic due to dunghill deposition and arc discharge, and the migration of hydrophobicity of silicon rubber can make
Silicon rubber after surface is dirty restores hydrophobicity within a certain period of time, and filthy layer surface is made also to have hydrophobicity.
Current power transmission line insulator usually use silicon rubber organic insulating material, this is because silastic material possess compared with
Good hydrophobicity, can effectively reduce pollution flashover probability of happening.Currently, DL/T 1474-2015《Nominal voltage is cross, straight higher than 1000V
Streaming system Hydrophobicity of Composite Insulator measurement method》And DL/T 810-2012《± 500kV and above direct current stick
Shape suspended compound insulator technical conditions》Define the conventional method for measuring insulator hydrophobicity, the wherein survey of migration of hydrophobicity
It is NaCl to recommend to stain with salt in amount method, is diatomite, equivalent salt density 0.1mg/cm with ash2, close ash is 0.5mg/cm2.According to
The composite insulator that method is selected accordingly is bad in unidentified pollution sources area applicability, and the heavy pollution area of salinity complexity is selected
Effective guidance cannot be provided with insulator.
In conclusion current Hydrophobicity of Composite Insulator energy evaluation method still cannot effectively examine salinity complexity heavy pollution
The migration of hydrophobicity of regional composite insulator brings obstacle for the heavy pollution area insulator selection of salinity complexity.
Invention content
The object of the present invention is to provide a kind of evaluation methods based on the grey close Hydrophobicity of Composite Insulator of salt.
In order to solve the above technical problems, technical solution provided by the invention is：
A kind of evaluation method based on the grey close Hydrophobicity of Composite Insulator of salt, includes the following steps：
1) composite insulator of the silicone rubber material of pending test is chosen；
2) surface of composite insulator is first cleaned with ethyl alcohol, it is then clean with distilled water flushing again, then distilled water is rushed
Composite insulator after wash clean is placed on standing and drying in dustless environment；
3) soiling solution of respective concentration is configured according to dirty area's grade of composite insulator used：Medium dirt area equivalent salt density is
0.1mg/cm2, close medium dirt area ash is 0.5mg/cm2；
The areas Chong Wu equivalent salt density is 0.3mg/cm2, the close areas Chong Wu ash is 1.5mg/cm2；
When configuring soiling solution, soluble salt selects CaCl2With NaCl, grey component selections diatomite；
4) silicon of a thin layer is uniformly coated on the surface of the composite insulator with dry hairbrush after step 2) standing and drying
Then diatomaceous earth blows away extra diatomite with air-blowing tool；
5) it is stained using the dirty method of leaching；
6) composite insulator after staining step 5) is placed on drying in dustfree environment, hydrophobicity is then detected, according to inspection
The static contact angle numerical value selection for surveying gained is suitble to the composite insulator of dirty area grade.
Preferably, in step 2), composite insulator of the distilled water flushing after clean is placed on to stand in dustless environment and is done
It is dry for 24 hours.
Preferably, in step 3), soluble salt selects CaCl2It is mixed with NaCl equal quality ratios.
Preferably, in step 5), step 4) is blown away to the composite insulator after extra diatomite and is completely immersed in soiling solution, in dirt
Rotation is taken out after 1~2 week in liquid, and staining need to complete in 1h.
Preferably, further include measuring process 5 between step 5) and step 6)) stain after the compound inslation for accompanying test
The equivalent salt density value and the close value of ash of son, determine stain it is dirty with whether make a reservation for filth suitable；
After determination stains dirty suitable with predetermined filth, the composite insulator after first staining step 5) is placed on dustless
It is dry in environment, hydrophobicity is then detected, the compound of dirty area grade is suitble to according to the static contact angle numerical value selection of detection gained
Insulator.
Preferably, in step 6), the composite insulator after step 5) is stained is placed in dustfree environment 4 days dry.
This application provides a kind of evaluation methods based on the grey close Hydrophobicity of Composite Insulator of salt, and the application is with compound exhausted
The migration of hydrophobicity of edge evaluates basis as hydrophobicity, and it is CaCl to stain with salt2With NaCl mixtures, wherein Ca2+To silicon rubber
The migration of hydrophobicity of glue has larger inhibition, and the migration of hydrophobicity of evaluation silicon rubber is removed with more harsh condition, is more advantageous to
The good insulator of hydrophobicity is selected, while recommending heavily contaminated area equivalent salt density, the close numerical value of ash, optimizes composite insulator
Migration of hydrophobicity evaluation method solves the insulator problem of selecting in the heavy pollution area of salinity complexity, can be that salinity is complicated
Heavy pollution area select insulator to provide effectively guidance, it is ensured that the composite insulator energy that the dirty area of weight of unidentified pollution sources is selected
Play the role of antifouling work, prevents the generation of transmission line of electricity pollution flashover accident, safeguard transmission line safety stable operation.And side of the present invention
Case is reasonable, and practicality is strong, highly effective, can effectively distinguish the difference of composite insulator migration of hydrophobicity, is that salinity is complicated
The selection of heavy pollution area insulator effectively guidance is provided, make positive contribution for Defile-proof for Electric Transmitting Line sudden strain of a muscle.
Specific implementation mode
For a further understanding of the present invention, the preferred embodiment of the invention is described with reference to embodiment, still
It should be appreciated that feature and advantage that these descriptions only further illustrate the present invention, rather than to the limit of the claims in the present invention
System.
This application provides a kind of evaluation methods based on the grey close Hydrophobicity of Composite Insulator of salt, include the following steps：
1) composite insulator of the silicone rubber material of pending test is chosen；
2) surface of composite insulator is first cleaned with ethyl alcohol, it is then clean with distilled water flushing again, then distilled water is rushed
Composite insulator after wash clean is placed on standing and drying in dustless environment；
3) soiling solution of respective concentration is configured according to dirty area's grade of composite insulator used：Medium dirt area equivalent salt density is
0.1mg/cm2, close medium dirt area ash is 0.5mg/cm2；
The areas Chong Wu equivalent salt density is 0.3mg/cm2, the close areas Chong Wu ash is 1.5mg/cm2；
When configuring soiling solution, soluble salt selects CaCl2With NaCl, grey component selections diatomite；
4) silicon of a thin layer is uniformly coated on the surface of the composite insulator with dry hairbrush after step 2) standing and drying
Then diatomaceous earth blows away extra diatomite with air-blowing tool；
5) it is stained using the dirty method of leaching；
6) composite insulator after staining step 5) is placed on drying in dustfree environment, hydrophobicity is then detected, according to inspection
The static contact angle numerical value selection for surveying gained is suitble to the composite insulator of dirty area grade.
In one embodiment of the application, in step 2), composite insulator of the distilled water flushing after clean is placed on nothing
Standing and drying is for 24 hours in the environment of dirt.
In one embodiment of the application, in step 3), soluble salt selects CaCl2It is mixed with NaCl equal quality ratios.
In one embodiment of the application, in step 5), step 4) is blown away to the composite insulator after extra diatomite
It is completely immersed in soiling solution, is taken out after being rotated 1~2 week in soiling solution, staining need to complete in 1h.
Further include measuring process 5 between step 5) and step 6) in one embodiment of the application) stain after accompany
With the equivalent salt density value and the close value of ash of the composite insulator of test, determine stain it is dirty with whether make a reservation for filth suitable；
After determination stains dirty suitable with predetermined filth, the composite insulator after first staining step 5) is placed on dustless
It is dry in environment, hydrophobicity is then detected, the compound of dirty area grade is suitble to according to the static contact angle numerical value selection of detection gained
Insulator.
In one embodiment of the application, in step 6), the composite insulator after step 5) is stained is placed on dustless ring
It is 4 days dry in border.
For a further understanding of the present invention, with reference to embodiment to provided by the invention a kind of based on close compound of salt ash
The evaluation method of insulator hydrophobicity is described in detail, and protection scope of the present invention is not limited by the following examples.
Embodiment 1
A kind of evaluation method based on the grey close Hydrophobicity of Composite Insulator of salt, includes the following steps：
1) composite insulator of the silicone rubber material of pending test is chosen, specific detail see the table below：
2) surface of composite insulator is first cleaned with ethyl alcohol, it is then clean with distilled water flushing again, then distilled water is rushed
Composite insulator after wash clean is placed in dustless environment standing and drying for 24 hours；
3) soiling solution of respective concentration is configured according to dirty area's grade of composite insulator used：Medium dirt area equivalent salt density is
0.1mg/cm2, close medium dirt area ash is 0.5mg/cm2；
The areas Chong Wu equivalent salt density is 0.3mg/cm2, the close areas Chong Wu ash is 1.5mg/cm2；
When configuring soiling solution, soluble salt selects CaCl2It is mixed with NaCl equal quality ratios, grey component selections diatomite；
| Dirty area | Equivalent salt density (mg/cm2) | Close (the mg/cm of ash2) |
| Medium dirt area | 0.1 | 0.5 |
| The areas Chong Wu | 0.3 | 1.5 |
4) silicon of a thin layer is uniformly coated on the surface of the composite insulator with dry hairbrush after step 2) standing and drying
Then diatomaceous earth blows away extra diatomite with air-blowing tool；
5) it is stained using the dirty method of leaching：Step 4) is blown away to the composite insulator after extra diatomite and is completely immersed in dirt
Liquid is taken out after being rotated 1~2 week in soiling solution, and staining need to complete in 1h；
6) measuring process 5) stain after the composite insulator for accompanying test equivalent salt density value and the close value of ash, determination contaminated
It is filthy whether suitable with predetermined filth；
7) it determines through measuring and stains dirty suitable with predetermined filth, the composite insulator after then staining step 5) is placed on
It is 4 days dry in dustfree environment, hydrophobicity is then detected, testing result see the table below：
Judged according to test result, the migration of hydrophobicity 96h static contact angles of RTV-2 are maximum, and migration of hydrophobicity is more preferable, in salt
Complicated heavy pollution area is divided to suggest preferential select.
The explanation of above example is only intended to facilitate the understanding of the method and its core concept of the invention.It should be pointed out that pair
For those skilled in the art, without departing from the principle of the present invention, the present invention can also be carried out
Some improvements and modifications, these improvement and modification are also fallen within the protection scope of the claims of the present invention.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
A variety of modifications for these embodiments are it will be apparent that as defined herein one for those skilled in the art
As principle can realize in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention will
It will not be intended to be limited to the embodiments shown herein, and be to fit to consistent with the principles and novel features disclosed herein
Widest range.
Claims (6)
1. a kind of evaluation method based on the grey close Hydrophobicity of Composite Insulator of salt, which is characterized in that include the following steps：
1) composite insulator of the silicone rubber material of pending test is chosen；
2) surface of composite insulator is first cleaned with ethyl alcohol, it is then clean with distilled water flushing again, then distilled water flushing is done
Composite insulator after net is placed on standing and drying in dustless environment；
3) soiling solution of respective concentration is configured according to dirty area's grade of composite insulator used：Medium dirt area equivalent salt density is 0.1mg/
cm2, close medium dirt area ash is 0.5mg/cm2；
The areas Chong Wu equivalent salt density is 0.3mg/cm2, the close areas Chong Wu ash is 1.5mg/cm2；
When configuring soiling solution, soluble salt selects CaCl2With NaCl, grey component selections diatomite；
4) diatomite of a thin layer is uniformly coated on the surface of the composite insulator with dry hairbrush after step 2) standing and drying,
Then extra diatomite is blown away with air-blowing tool；
5) it is stained using the dirty method of leaching；
6) composite insulator after staining step 5) is placed on drying in dustfree environment, then detects hydrophobicity, according to detection institute
The static contact angle numerical value selection obtained is suitble to the composite insulator of dirty area grade.
2. evaluation method according to claim 1, which is characterized in that in step 2), by distilled water flushing answering after clean
It closes insulator and is placed in dustless environment standing and drying for 24 hours.
3. evaluation method according to claim 1, which is characterized in that in step 3), soluble salt selects CaCl2With NaCl etc.
Mass ratio mixes.
4. evaluation method according to claim 1, which is characterized in that in step 5), step 4) is blown away extra diatomite
Composite insulator afterwards is completely immersed in soiling solution, is taken out after being rotated 1~2 week in soiling solution, staining need to complete in 1h.
5. evaluation method according to claim 1, which is characterized in that further include measuring step between step 5) and step 6)
It is rapid 5) stain after the composite insulator for accompanying test equivalent salt density value and the close value of ash, determine to stain dirty is with predetermined filth
It is no suitable；
After determination stains dirty suitable with predetermined filth, the composite insulator after first staining step 5) is placed on dustfree environment
Middle drying, then detects hydrophobicity, and the compound inslation of dirty area grade is suitble to according to the static contact angle numerical value selection of detection gained
Son.
6. evaluation method according to claim 1, which is characterized in that compound exhausted after step 5) is stained in step 6)
Edge is placed in dustfree environment 4 days dry.
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Cited By (4)
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| CN110426324A (en) * | 2019-08-27 | 2019-11-08 | 南京大学 | A kind of measuring method of the sub- surface hydrophobicity migration of polyolefin insulation |
| CN111579943A (en) * | 2020-05-21 | 2020-08-25 | 国网山东省电力公司电力科学研究院 | Method for testing surface pollution pressure resistance of insulator coated with anti-pollution flashover coating |
| CN111751677A (en) * | 2020-06-02 | 2020-10-09 | 国网江西省电力有限公司电力科学研究院 | Method for testing anti-pollution flashover performance of hydrophobic material on surface of insulator |
| CN113933664A (en) * | 2021-10-11 | 2022-01-14 | 广西电网有限责任公司电力科学研究院 | Artificial pollution test method for composite cross arm structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110426324A (en) * | 2019-08-27 | 2019-11-08 | 南京大学 | A kind of measuring method of the sub- surface hydrophobicity migration of polyolefin insulation |
| CN110426324B (en) * | 2019-08-27 | 2021-06-04 | 南京大学 | Method for measuring surface hydrophobic migration of polyolefin insulator |
| CN111579943A (en) * | 2020-05-21 | 2020-08-25 | 国网山东省电力公司电力科学研究院 | Method for testing surface pollution pressure resistance of insulator coated with anti-pollution flashover coating |
| CN111751677A (en) * | 2020-06-02 | 2020-10-09 | 国网江西省电力有限公司电力科学研究院 | Method for testing anti-pollution flashover performance of hydrophobic material on surface of insulator |
| CN113933664A (en) * | 2021-10-11 | 2022-01-14 | 广西电网有限责任公司电力科学研究院 | Artificial pollution test method for composite cross arm structure |
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Application publication date: 20181102 |