CN107797036A - A kind of method based on high voltage and the evaluating combined insulator interface performance of salting liquid - Google Patents
A kind of method based on high voltage and the evaluating combined insulator interface performance of salting liquid Download PDFInfo
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- CN107797036A CN107797036A CN201710980312.7A CN201710980312A CN107797036A CN 107797036 A CN107797036 A CN 107797036A CN 201710980312 A CN201710980312 A CN 201710980312A CN 107797036 A CN107797036 A CN 107797036A
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- short sample
- insulator
- interface
- composite insulator
- salting liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Insulators (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention belongs to power domain, more particularly to a kind of method based on high voltage and the evaluating combined insulator interface performance of salting liquid.The invention provides a kind of method based on high voltage and the evaluating combined insulator interface performance of salting liquid, including：After the short sample of composite insulator is connected with leakage current measurement device loop is formed with high voltage power supply, 6~12h of salting liquid is added dropwise in the first end of the short sample of composite insulator again, and detects the leakage current of the short sample of composite insulator by leakage current detection means simultaneously；If all leakage currents are not more than preset current value, the interface of the short sample of composite insulator is qualified is judged to all leakage currents of leakage current detection means detection.The present invention considers situation of the compound inslation sub-interface in actual deterioration process, has investigated the influence of high voltage and salting liquid simultaneously in evaluating combined insulator interface performance, preferably composite insulator interface performance can be evaluated.
Description
Technical field
The invention belongs to power domain, more particularly to one kind are interface characteristics based on high voltage and the evaluating combined insulator of salting liquid
The method of energy.
Background technology
Composite insulator has excellent performance, high mechanical strength under filthy and wet environment, is hardly damaged, transports installation
Conveniently, the advantages of cost is cheap, its advantage on super-pressure and extra high voltage line is more prominent, therefore goes out from the 1960s
Just it has been widely used since existing.But with the increase of run time and operation quantity, interface occurs in composite insulator
Deterioration, the phenomenon of high temperature exothermic, the phenomenon can finally trigger Insulator detection, influence the safe operation of power network.
The interface problem of composite insulator is had become an important factor for influenceing its safe operation, because interface is in insulator
Inside, internal flaw have disguise, are all not easy to realize in factory testing, line data-logging.When internal flaw develop into it is larger
During degree, its can be shown in outside heating phenomena such as.The presence of defect can make composite insulator mechanical load-bearing capability and absolutely
Edge material is in itself by larger weakening, it is therefore desirable to which effective interface detection method improves the stable water of insulator
It is flat.
The investigation method for composite insulator interface quality is mainly with sheath plug water method of diffusion, this method at present
The short sample of the plug with sheath is intercepted on composite insulator, then places it in 100h in the saline solution of boiling, then pass through
The leakage current of plug short sample investigates interface quality after measurement boiling.
Chinese patent CN106123952A discloses a kind of detection method and device of insulator interface quality, detection method
Including detecting the work of separation of the insulator in unit area, the leakage current of insulator and plug is measured, further obtains insulation
The boundary leakage electric current of son determines the interface quality of insulator.
Chinese patent CN102507731A discloses a kind of method for detecting composite insulator interface defect, the detection method pair
Composite insulator carries out the experiment of measurement leakage current after boiling, further according to the DC voltage and corresponding leakage current data measured
Power function fitting is carried out, the boundary defect of composite insulator is judged according to fitting result, is referred to using characteristic coefficient ratio or feature
Number rate of change carries out differentiation boundary defect.
Prior art is dropped by testing the leakage current of the short sample of composite insulator after boiling by the method for high temperature boiling
The interface performance of low insulation, the performance at interface is examined by leakage current size.Because the interface of insulator deteriorates actually
The effect of moisture attack is not only existed, is more shelf depreciation, the process of salting liquid corrosion, new insulation subsample base be present
Originally the detection of leakage current test can be passed through, but performance of more concern interfaces under longtime running is old in the operation of scene
Change characteristic, therefore the leakage current measurement of short time is difficult to judge the long-term ageing property at interface, prior art is to multiple
Inaccuracy be present in the Performance for closing insulation sub-interface.
The content of the invention
In view of this, the invention provides a kind of side based on high voltage and the evaluating combined insulator interface performance of salting liquid
Method, for solving do not have actual composite insulator to consider to deposit in deterioration process when prior art detects composite insulator interface performance
Shelf depreciation, salting liquid corrosion the problem of.
The invention provides a kind of method based on high voltage and the evaluating combined insulator interface performance of salting liquid, including：
Loop is formed with high voltage power supply after the short sample of composite insulator is connected with leakage current measurement device, then described
6~12h of salting liquid is added dropwise in the first end of the short sample of composite insulator, and detects institute by the leakage current detection means simultaneously
State the leakage current of the short sample of composite insulator；
All leakage currents of leakage current detection means detection are judged, if all leakage currents are not
More than preset current value, then the interface of the short sample of the composite insulator is qualified.
Preferably, loop is formed with high voltage power supply after the short sample of composite insulator is connected with leakage current measurement device,
6~12h of salting liquid is added dropwise in the first end of the short sample of the composite insulator again, and is detected and filled by the leakage current simultaneously
Also include before putting the leakage current for detecting the short sample of composite insulator：
The short sample inclination of the composite insulator is placed；
The angle that the short sample inclination of composite insulator is placed is 15 °~45 °.
Preferably, the first end of the short sample of the composite insulator is the upper end of the short sample of the composite insulator.
Preferably, the short sample of the composite insulator is the compound inslation of the exposed plug of the exposed plug of first end and the second end
The short sample of son.
Preferably, the rate of addition of the salting liquid is 3~5mL/min；
Preferably, the length of the short sample of the composite insulator is 400mm；
The length of the exposed plug of first end is 50mm；
The length of the exposed plug in second end is 50mm.
Preferably, the magnitude of voltage of the high voltage power supply is 1~30kV.
Preferably, the resistivity of the salting liquid is 3~5 Ω m.
Preferably, the salting liquid is NH4Cl、NH4NO3, KCl or KNO3In one or more and isooctylphenoxy
The aqueous solution of polyethoxy ethanol.
Preferably, all leakage currents of leakage current detection means detection are judged, all let out if described
Leakage current is not more than preset current value, then also includes after the interface of the short sample of the composite insulator is qualified：
Detect the interface of the non-exposed mandrel segment plug and sheath of the short sample of the composite insulator；
If erosion is not present in the interface and all leakage currents are less than the half of preset current value, described
The interface of the short sample of composite insulator is one-level；
If the interface exist corrode and all leakage currents have that leakage current is preset current value two/
Between one and preset current value, then the interface of the short sample of the composite insulator is two level.
In summary, the invention provides a kind of side based on high voltage and the evaluating combined insulator interface performance of salting liquid
Method, including：Loop is formed with high voltage power supply after the short sample of composite insulator is connected with leakage current measurement device, then described
6~12h of salting liquid is added dropwise in the first end of the short sample of composite insulator, and detects institute by the leakage current detection means simultaneously
State the leakage current of the short sample of composite insulator；All leakage currents of leakage current detection means detection are sentenced
Disconnected, if all leakage currents are not more than preset current value, the interface of the short sample of composite insulator is qualified.The present invention
Situation of the interface of composite insulator in actual deterioration process is considered, is examined simultaneously in evaluating combined insulator interface performance
The influence of high voltage and salting liquid has been examined, preferably composite insulator interface performance can have been evaluated.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described.
Fig. 1 is that the one kind provided in the embodiment of the present invention is based on high voltage and the evaluating combined insulator interface performance of salting liquid
Method schematic diagram；
Illustrate, the short sample of 1. composite insulators；2. salting liquid；3. leakage current measurement device；4. high voltage power supply.
Embodiment
The invention provides a kind of method based on high voltage and the evaluating combined insulator interface performance of salting liquid, for solving
There is no certainly actual composite insulator to consider local put in deterioration process be present during prior art detection composite insulator interface performance
The problem of electricity, salting liquid corrosion.
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example only part of the embodiment of the present invention, rather than whole embodiments.It is common based on the embodiment in the present invention, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
Referring to Fig. 1, it is based on high voltage and the evaluating combined insulator of salting liquid for the one kind provided in the embodiment of the present invention
The schematic diagram of the method for interface performance.
The embodiments of the invention provide a kind of method based on high voltage and the evaluating combined insulator interface performance of salting liquid,
Including：
Form loop after the short sample 1 of composite insulator is connected with leakage current measurement device 3 with high voltage power supply 4, then
Salting liquid 2 is added dropwise in the first end of the short sample 1 of composite insulator, and the time is 6~12h, and passes through leakage current detection means 3 simultaneously
Detect the leakage current of the short sample 1 of composite insulator；
All leakage currents detected to leakage current detection means 3 judge, if all leakage currents are no more than pre-
Current value is put, then the interface of the short sample 1 of composite insulator is qualified.
In the embodiment of the present invention, the time that salting liquid 2 is added dropwise is 6h.
Form loop after the short sample 1 of composite insulator is connected with leakage current measurement device 3 with high voltage power supply 4, then
Salting liquid 2 is added dropwise in the first end of the short sample 1 of composite insulator, and the time is 6~12h, and passes through leakage current detection means 3 simultaneously
Also include before detecting the leakage current of the short sample 1 of composite insulator：
By the short slant setting of sample 1 of composite insulator；
The short 1 tilted-putted angle of sample of composite insulator is 15 °~45 °.
In the embodiment of the present invention, the short 1 tilted-putted angle of sample of composite insulator is 30 °.
The first end of the short sample 1 of composite insulator is the upper end of the short sample 1 of composite insulator.
The short sample 1 of composite insulator is the short sample of composite insulator of the exposed plug of the exposed plug of first end and the second end.
The rate of addition of salting liquid 2 is 3~5mL/min；
The length of the short sample 1 of composite insulator is 400mm；
The length of the exposed plug of first end is 50mm；
The length of the exposed plug in second end is 50mm.
The magnitude of voltage of high voltage power supply 4 is 1~30kV.
The resistivity of salting liquid 2 is 3~5 Ω m.
Salting liquid 2 is NH4Cl、NH4NO3, KCl or KNO3In one or more with isooctylphenoxy polyethoxy second
The aqueous solution of alcohol.
In the embodiment of the present invention, the rate of addition of salting liquid 2 is 3mL/min；
The magnitude of voltage of high voltage power supply 4 is 12kV, and high voltage power supply 4 is the high-pressure side of transformer；
The resistivity of salting liquid 2 is 3.9~4.0 Ω m；
Salting liquid 2 is the pure NH of analysis that mass fraction is 0.1%4Cl and the isooctylphenoxy that mass fraction is 0.02%
The polyethoxy ethanol aqueous solution, the collocation method of salting liquid 2 are that will analyze pure NH4Cl and isooctylphenoxy polyethoxy ethanol
It is dissolved in deionized water.
All leakage currents detected to leakage current detection means 3 judge, if all leakage currents are no more than pre-
Current value is put, then is also included after the interface of the short sample 1 of composite insulator is qualified：
Detect the interface of the non-exposed mandrel segment plug and sheath of the short sample 1 of composite insulator；
If erosion is not present in interface and all leakage currents are less than the half of preset current value, composite insulator is short
The interface of sample is one-level；
If interface exist corrode and all leakage currents exist leakage current be preset current value half with it is preset
Between current value, then the interface of the short sample of composite insulator is two level.
In the embodiment of the present invention, preset current value is 100 μ A.
In the embodiment of the present invention, if the interface base of the non-exposed mandrel segment plug and sheath of the short sample 1 of composite insulator
This is unchanged, and bonding is without being decreased obviously, and all leakage currents are less than 50 μ A, then the interface of the short sample 1 of composite insulator is one-level；
If the interface of the non-exposed mandrel segment plug and sheath of the short sample 1 of composite insulator is layered, mandrel surface
There is flavescence deterioration vestige, all leakage currents have the interface that leakage current is 50~100 μ A, the then short sample 1 of composite insulator
For two level；
If the interface of the non-exposed mandrel segment plug and sheath of the short sample 1 of composite insulator is layered, mandrel surface
There is flavescence deterioration vestige, all leakage currents have leakage current and are more than 100 μ A, then the interface of the short sample 1 of composite insulator is
Three-level；
When the interface of the short sample 1 of composite insulator is firsts and seconds, then meet requirement；The short sample of composite insulator
When 1 interface is three-level, then requirement is unsatisfactory for.
The embodiments of the invention provide a kind of method based on high voltage and the evaluating combined insulator interface performance of salting liquid,
Including：Loop is formed after the short sample of composite insulator is connected with leakage current measurement device with high voltage power supply, then compound exhausted
6~12h of salting liquid is added dropwise in the first end of the short sample of edge, and simultaneously short by leakage current detection means detection composite insulator
The leakage current of sample；All leakage currents of leakage current detection means detection are judged, if all leakage currents are not
More than preset current value, then the interface of the short sample of composite insulator is qualified.The present invention considers the interface of composite insulator in reality
Situation in the deterioration process of border, investigate the influence of high voltage and salting liquid simultaneously in evaluating combined insulator interface performance,
Preferably composite insulator interface performance can be evaluated.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
- A kind of 1. method based on high voltage and the evaluating combined insulator interface performance of salting liquid, it is characterised in that including：Loop is formed with high voltage power supply after the short sample of composite insulator is connected with leakage current measurement device, then described compound 6~12h of salting liquid is added dropwise in the first end of the short sample of insulator, and simultaneously described multiple by leakage current detection means detection Close the leakage current of the short sample of insulator；All leakage currents of leakage current detection means detection are judged, if all leakage currents are not more than Preset current value, then the interface of the short sample of the composite insulator is qualified.
- 2. the method for evaluating combined insulator interface performance according to claim 1, it is characterised in that by composite insulator Short sample with high voltage power supply forms loop, then the in the short sample of the composite insulator after being connected with leakage current measurement device 6~12h of salting liquid is added dropwise in one end, and detects the short sample of composite insulator by the leakage current detection means simultaneously Also include before leakage current：The short sample inclination of the composite insulator is placed；The angle that the short sample inclination of composite insulator is placed is 15 °~45 °.
- 3. the method for evaluating combined insulator interface performance according to claim 2, it is characterised in that the compound inslation The first end of the short sample of son is the upper end of the short sample of the composite insulator.
- 4. the method for evaluating combined insulator interface performance according to claim 3, it is characterised in that the compound inslation The short sample of son is the short sample of composite insulator of the exposed plug of the exposed plug of first end and the second end.
- 5. the method for evaluating combined insulator interface performance according to claim 4, it is characterised in that the salting liquid Rate of addition is 3~5mL/min.
- 6. the method for evaluating combined insulator interface performance according to claim 4, it is characterised in that the compound inslation The length of the short sample of son is 400mm；The length of the exposed plug of first end is 50mm；The length of the exposed plug in second end is 50mm.
- 7. the method for evaluating combined insulator interface performance according to claim 4, it is characterised in that the high voltage power supply Magnitude of voltage be 1~30kV.
- 8. the method for evaluating combined insulator interface performance according to claim 4, it is characterised in that the salting liquid Resistivity is 3~5 Ω m.
- 9. the method for evaluating combined insulator interface performance according to claim 4, it is characterised in that the salting liquid is NH4Cl、NH4NO3, KCl or KNO3In one or more and the aqueous solution of isooctylphenoxy polyethoxy ethanol.
- 10. the method for evaluating combined insulator interface performance according to claim 4, it is characterised in that to the leakage All leakage currents of current sensing means detection are judged, if all leakage currents are not more than preset current value, The interface of the short sample of composite insulator is qualified also to be included afterwards：Detect the interface of the non-exposed mandrel segment plug and sheath of the short sample of the composite insulator；If erosion is not present in the interface and all leakage currents are less than the half of preset current value, described compound The interface of the short sample of insulator is one-level；If the interface exist corrode and all leakage currents exist half that leakage current is preset current value with Between preset current value, then the interface of the short sample of the composite insulator is two level.
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Cited By (6)
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| CN109143927A (en) * | 2018-08-17 | 2019-01-04 | 无锡市格林电工装备有限公司 | A kind of rail stray electrical current removing method, apparatus and system |
| CN109188223A (en) * | 2018-09-29 | 2019-01-11 | 海南电网有限责任公司电力科学研究院 | A kind of composite insulator interface quality detection and localization seal and method |
| CN109581105A (en) * | 2018-11-28 | 2019-04-05 | 武汉大学 | Composite insulator interface performance appraisal procedure based on leakage current change rate |
| CN111812468A (en) * | 2020-07-17 | 2020-10-23 | 国网北京市电力公司 | Composite insulator evaluation method, evaluation device, processor and evaluation system |
| CN113740405A (en) * | 2021-09-06 | 2021-12-03 | 西南交通大学 | Device and method for measuring ion concentration on surface of electrode under action of direct current electric field |
| CN114113932A (en) * | 2021-11-22 | 2022-03-01 | 国网河南省电力公司电力科学研究院 | Device for accelerating crusting, decaying and aging of composite insulator core rod |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109143927A (en) * | 2018-08-17 | 2019-01-04 | 无锡市格林电工装备有限公司 | A kind of rail stray electrical current removing method, apparatus and system |
| CN109143927B (en) * | 2018-08-17 | 2021-08-17 | 无锡市格林电工装备有限公司 | Method, device and system for eliminating stray current of running rail |
| CN109188223A (en) * | 2018-09-29 | 2019-01-11 | 海南电网有限责任公司电力科学研究院 | A kind of composite insulator interface quality detection and localization seal and method |
| CN109581105A (en) * | 2018-11-28 | 2019-04-05 | 武汉大学 | Composite insulator interface performance appraisal procedure based on leakage current change rate |
| CN109581105B (en) * | 2018-11-28 | 2021-07-06 | 武汉大学 | Composite insulator interface performance evaluation method based on leakage current change rate |
| CN111812468A (en) * | 2020-07-17 | 2020-10-23 | 国网北京市电力公司 | Composite insulator evaluation method, evaluation device, processor and evaluation system |
| CN113740405A (en) * | 2021-09-06 | 2021-12-03 | 西南交通大学 | Device and method for measuring ion concentration on surface of electrode under action of direct current electric field |
| CN114113932A (en) * | 2021-11-22 | 2022-03-01 | 国网河南省电力公司电力科学研究院 | Device for accelerating crusting, decaying and aging of composite insulator core rod |
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