CN110554071A - System and method for detecting hydrophobicity of contaminated insulator based on phase angle difference method - Google Patents
System and method for detecting hydrophobicity of contaminated insulator based on phase angle difference method Download PDFInfo
- Publication number
- CN110554071A CN110554071A CN201910800637.1A CN201910800637A CN110554071A CN 110554071 A CN110554071 A CN 110554071A CN 201910800637 A CN201910800637 A CN 201910800637A CN 110554071 A CN110554071 A CN 110554071A
- Authority
- CN
- China
- Prior art keywords
- insulator
- time
- phase angle
- angle difference
- steam boiler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R13/00—Arrangements for displaying electric variables or waveforms
Landscapes
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Electrochemistry (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Relating To Insulation (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Insulators (AREA)
Abstract
the invention belongs to a system for detecting hydrophobicity of a contaminated insulator based on a phase angle difference method, which comprises the following steps: the device comprises a steam boiler, a climate tank, a measuring circuit, a unit for monitoring and calibrating the surface contamination conductivity of the insulator and an oscilloscope; the unit for monitoring and calibrating the surface contamination conductivity of the insulator comprises a data acquisition unit and a data processing unit which are sequentially connected; the steam boiler is arranged at the lower end of one side of the climate tank and is used for generating hot mist to the climate tank; the method comprises the steps of suspending a to-be-measured polluted composite insulator in a climate tank, arranging copper conductive adhesive on the surface of the to-be-measured polluted composite insulator to serve as a measuring electrode, and connecting the measuring electrode with a measuring circuit. According to the invention, the time t from the beginning of fogging of the steam boiler of the polluted composite insulator to be detected to the moment when the phase angle difference value is kept unchanged is measured, the hydrophobic grade of the insulator is quantitatively judged, the accuracy of hydrophobic grade identification is improved, and the existing insulator artificial pollution test method is further perfected.
Description
Technical Field
The invention belongs to the technical field of detection of performance of a calibration insulator of a power transmission line, and particularly relates to a system and a method for detecting hydrophobicity of a contaminated insulator based on a phase angle difference method.
background
with the rapid development of economy in China, the problem of air pollution is more serious. Atmospheric pollutants floating in the air are adsorbed on the surface of the calibration insulator under the comprehensive action of gravity, electric field force and the like. Under the severe conditions of rain, fog, dew, ice melting, snow melting and the like, the dirt on the surface of the calibration insulator is damped, so that the electrical strength of the calibration insulator is greatly reduced, and pollution flashover accidents are easy to happen. The external insulation pollution flashover becomes a great threat to the safe operation of the power system.
The silicone rubber composite calibration insulator shows excellent antifouling performance due to the hydrophobicity and the hydrophobic migration property, and is widely used in power grids in China. However, as the operating time increases, the gradual aging of the silicone rubber material and the continuous deposition of dirt can reduce or even lose the hydrophobicity of the surface of the calibration insulator, which directly results in the great reduction of the pollution resistance level. Therefore, it is very important to periodically perform the hydrophobicity detection work of the composite calibration insulator.
the current measuring method for the hydrophobicity of the composite calibration insulator mainly comprises a contact angle method, a surface tension method and a water spraying grading method. The contact angle method can only test a flat plate sample with a simple shape, requires a strict test environment, and can hardly be used in the field. When the contact angle measurement is carried out on the composite calibration insulator string, a small umbrella skirt or a small sheath needs to be cut out to be used as a sample. In addition, when the hydrophobicity of a polluted sample is measured, the phenomenon of contact angle retardation of water drops can occur. The surface tension method is rarely used, and the feasibility of measuring a dirty sample and the cumulative effect of multiple measurements need to be further tested. The water spraying classification method is an artificial naked eye judgment method, has large subjective dependence on people and is greatly influenced by artificial factors.
Disclosure of Invention
In order to solve the problem of low accuracy in the prior art, the invention provides a system and a method for detecting hydrophobicity of a contaminated insulator based on a phase angle difference method.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a system for detecting hydrophobicity of a contaminated insulator based on a phase angle difference method comprises the following steps: the device comprises a steam boiler, a climate tank, a measuring circuit, a unit for monitoring and calibrating the surface contamination conductivity of the insulator and an oscilloscope; the unit for monitoring and calibrating the surface contamination conductivity of the insulator comprises a data acquisition unit and a data processing unit which are sequentially connected; the steam boiler is arranged at the lower end of one side of the climate tank and is used for generating hot mist to the climate tank; the method comprises the steps that a to-be-detected polluted composite insulator is hung in a climate tank, copper conductive adhesive is arranged on the surface of the to-be-detected polluted composite insulator and serves as a measuring electrode, the measuring electrode is connected with a measuring circuit, the measuring circuit is further connected with a data acquisition unit, and a data processing unit is further connected with an oscilloscope.
A method for detecting the hydrophobicity of a contaminated composite insulator by using the system for detecting the hydrophobicity of the contaminated insulator based on the phase angle difference method comprises the following steps:
s1, sequentially measuring the time from the beginning of the steam boiler fogging to the time when the phase angle difference value is kept unchanged for different calibration insulators with known hydrophobic grades by using the system to obtain a fitting formula; the fitting equation is a function of the hydrophobicity grade with respect to the time;
S2, measuring the time t from the beginning of the mist adding of the steam boiler to the time when the phase angle difference value is kept unchanged by using the system and the experimental conditions used in the step S1 for the contaminated composite insulator to be measured;
And S3, substituting the time t into a fitting formula to obtain the hydrophobic grade of the contamination composite insulator to be detected.
Preferably, step S1 includes:
S11, cleaning the calibration insulator for later use;
s12, arranging copper conductive adhesive on the surface of the calibration insulator to serve as a measuring electrode;
S13, uniformly coating dirt with a preset salt ash density value on the surface of the calibration insulator, airing and respectively allowing the hydrophobicity of the calibration insulator to migrate for different times; sequentially judging the hydrophobic grade of the calibration insulator according to a water spraying classification method;
And S14, measuring the time from the beginning of the mist adding of the steam boiler to the time when the phase angle difference value is kept unchanged by using the system to transfer the calibration insulators at different times, and obtaining a fitting formula.
Preferably, step S14 includes: and measuring the time from the beginning of the fogging of the steam boiler to the time when the phase angle difference value is kept unchanged by using the system, obtaining a fitting curve about the hydrophobic grade and the time, and obtaining a fitting formula according to the fitting curve.
preferably, in step S1, the experimental conditions for measuring the time from the beginning of the fogging of the steam boiler to the time when the phase angle difference is kept constant by using the system are that the ambient temperature is 30 ℃ ± 2 ℃, the humidity is 60% ± 5%, and the hot fogging of the steam boiler is at a flow rate of 0.077kg/h · m 3.
Preferably, in step S2, the time t from the beginning of the fogging of the steam boiler to the time when the phase angle difference remains constant is observed by an oscilloscope.
the invention has the beneficial effects that:
According to the invention, the time t from the beginning of fogging of the steam boiler of the polluted composite insulator to be detected to the moment when the phase angle difference value is kept unchanged is measured, the hydrophobic grade of the insulator is quantitatively judged, the accuracy of hydrophobic grade identification is improved, and the existing insulator artificial pollution test method is further perfected.
Drawings
the invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a block diagram of a system for detecting hydrophobicity of a contaminated insulator based on a phase angle difference method according to the present invention;
Fig. 2 is a schematic flow chart of the method for detecting the hydrophobicity of the contaminated insulator based on the phase angle difference method.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
referring to fig. 1, a system for detecting hydrophobicity of a contaminated insulator based on a phase angle difference method includes: the device comprises a steam boiler 11, a climate tank 12, a measuring circuit 13, a unit 14 for monitoring and calibrating the electrical conductivity of the dirt on the surface of the insulator and an oscilloscope 15; the unit 14 for monitoring and calibrating the surface contamination conductivity of the insulator comprises a data acquisition unit and a data processing unit which are sequentially connected; a steam boiler 11 provided at a lower end of one side of the climate tank 12 for generating hot mist to the climate tank 12; the method comprises the steps that a to-be-detected polluted composite insulator is hung in a climate tank 12, copper conductive adhesive is arranged on the surface of a to-be-detected polluted composite insulator 16 and serves as a measuring electrode, the measuring electrode is connected with a measuring circuit 13, the measuring circuit 13 is further connected with a data acquisition unit, and a data processing unit is further connected with an oscilloscope 15.
it should be noted that the measuring circuit 13 and the unit 14 for monitoring and calibrating the conductivity of the surface contamination of the insulator both adopt the invention patent "a system for monitoring the conductivity of the contamination on the surface of the insulator" which has been applied by the subject group, and the patent number is 201310689364. The measuring electrode is connected to a unit 14 for monitoring and calibrating the surface contamination conductivity of the insulator through a measuring circuit, the unit 14 for monitoring and calibrating the surface contamination conductivity of the insulator obtains a signal source voltage signal and a constant value resistance voltage signal from the measuring unit, the two signals respectively obtain a phase angle difference of the two signals through a data processing unit, and the data processing unit is further connected with an oscilloscope 15. The oscilloscope 15 displays the phase angle difference.
Referring to fig. 2, a method for detecting hydrophobicity of a contaminated composite insulator by using the system comprises the following steps:
S1, sequentially measuring the time from the beginning of the mist adding of the steam boiler 11 to the time when the phase angle difference value is kept unchanged for different calibration insulators with known hydrophobic grades by using the system to obtain a fitting formula; the fitting equation is a function of the hydrophobicity grade with respect to the time; specifically, step S1 includes:
S11, cleaning the calibration insulator for later use;
S12, arranging copper conductive adhesive on the surface of the calibration insulator to serve as a measuring electrode;
S13, uniformly coating dirt with a preset salt ash density value on the surface of the calibration insulator, airing and respectively allowing the hydrophobicity of the calibration insulator to migrate for different times; sequentially judging the hydrophobic grade of the calibration insulator according to a water spraying classification method;
S14, the system is used for measuring the time from the beginning of the mist adding of the steam boiler 11 to the time when the phase angle difference value is kept unchanged during the migration of the calibration insulators at different times, and a fitting formula is obtained. Table 1 shows the time t for which the phase angle difference θ remains substantially constant for different hydrophobic grades, specifically, step S14 includes: the system is utilized to measure the time from the beginning of the mist adding of the steam boiler 11 to the constant phase angle difference value of the calibration insulator migrating at different time, a fitting curve about the hydrophobic grade and the time is obtained, and a fitting formula is obtained according to the fitting curve.
TABLE 1 time t (min) for which the phase angle difference theta remains substantially constant for different hydrophobic grades
Wherein the experimental conditions are that the ambient temperature is 30 ℃ plus or minus 2 ℃, the humidity is 60 percent plus or minus 5 percent, and the flow rate of the hot mist of the steam boiler 11 is 0.077 kg/h.m 3.
S2, measuring the time t from the beginning of the mist adding of the steam boiler 11 to the unchanged phase angle difference value of the contaminated composite insulator 16 to be measured by using the system and the experimental conditions used in the step S1; in step S2, the time t from the start of the fogging of the steam boiler 11 to the time when the phase angle difference is kept constant is observed by the oscilloscope 15.
and S3, substituting the time t into a fitting formula to obtain the hydrophobic grade of the contamination composite insulator 16 to be detected.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. The utility model provides a system for detect hydrophobicity of contaminated insulator based on phase angle difference method which characterized in that includes: the device comprises a steam boiler, a climate tank, a measuring circuit, a unit for monitoring and calibrating the surface contamination conductivity of the insulator and an oscilloscope; the unit for monitoring and calibrating the surface contamination conductivity of the insulator comprises a data acquisition unit and a data processing unit which are sequentially connected;
The steam boiler is arranged at the lower end of one side of the climate tank and is used for generating hot mist to the climate tank; the method comprises the steps that a to-be-detected polluted composite insulator is hung in a climate tank, copper conductive adhesive is arranged on the surface of the to-be-detected polluted composite insulator and serves as a measuring electrode, the measuring electrode is connected with a measuring circuit, the measuring circuit is further connected with a data acquisition unit, and a data processing unit is further connected with an oscilloscope.
2. A method for detecting the hydrophobicity of a contaminated composite insulator by using the system for detecting the hydrophobicity of a contaminated insulator based on the phase angle difference method as claimed in claim 1, comprising the following steps:
S1, sequentially measuring the time from the beginning of the steam boiler fogging to the time when the phase angle difference value is kept unchanged for different calibration insulators with known hydrophobic grades by using the system to obtain a fitting formula; the fitting equation is a function of the hydrophobicity grade with respect to the time;
s2, measuring the time t from the beginning of the mist adding of the steam boiler to the time when the phase angle difference value is kept unchanged by using the system and the experimental conditions used in the step S1 for the contaminated composite insulator to be measured;
And S3, substituting the time t into a fitting formula to obtain the hydrophobic grade of the contamination composite insulator to be detected.
3. The method according to claim 2, wherein step S1 includes:
S11, cleaning the calibration insulator for later use;
S12, arranging copper conductive adhesive on the surface of the calibration insulator to serve as a measuring electrode;
s13, uniformly coating dirt with a preset salt ash density value on the surface of the calibration insulator, airing and respectively allowing the hydrophobicity of the calibration insulator to migrate for different times; sequentially judging the hydrophobic grade of the calibration insulator according to a water spraying classification method;
and S14, measuring the time from the beginning of the mist adding of the steam boiler to the time when the phase angle difference value is kept unchanged by using the system to transfer the calibration insulators at different times, and obtaining a fitting formula.
4. the method according to claim 3, wherein step S14 comprises:
And measuring the time from the beginning of the fogging of the steam boiler to the time when the phase angle difference value is kept unchanged by using the system, obtaining a fitting curve about the hydrophobic grade and the time, and obtaining a fitting formula according to the fitting curve.
5. the method of claim 2, wherein in step S1, the experimental conditions for measuring the time from the beginning of the fogging of the steam boiler to the time when the phase angle difference is kept constant by using the system are that the ambient temperature is 30 ℃ ± 2 ℃, the humidity is 60% ± 5%, and the hot fogging of the steam boiler is 0.077 kg/h-m 3.
6. The method according to claim 2, wherein in step S2, the time t from the beginning of the fogging of the steam boiler to the time when the phase angle difference is kept constant is observed by an oscilloscope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910800637.1A CN110554071A (en) | 2019-08-28 | 2019-08-28 | System and method for detecting hydrophobicity of contaminated insulator based on phase angle difference method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910800637.1A CN110554071A (en) | 2019-08-28 | 2019-08-28 | System and method for detecting hydrophobicity of contaminated insulator based on phase angle difference method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110554071A true CN110554071A (en) | 2019-12-10 |
Family
ID=68736607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910800637.1A Pending CN110554071A (en) | 2019-08-28 | 2019-08-28 | System and method for detecting hydrophobicity of contaminated insulator based on phase angle difference method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110554071A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2534712B2 (en) * | 1987-07-01 | 1996-09-18 | 凸版印刷株式会社 | Conductive film |
| CN2546987Y (en) * | 2002-05-17 | 2003-04-23 | 帅上本 | Bird droppings proof compound insulator |
| CN101527194A (en) * | 2008-03-04 | 2009-09-09 | 华北电力科学研究院有限责任公司 | Contamination-flashover resistance method and contamination-flashover resistance insulated device for rapid contamination accumulation |
| CN204116195U (en) * | 2014-09-22 | 2015-01-21 | 河南宏博测控技术有限公司 | Portable hydrophobic nature proving installation |
| CN105973941A (en) * | 2016-04-29 | 2016-09-28 | 南方电网科学研究院有限责任公司 | Method for measuring damp degree of insulator surface dirt by using angular phase difference, and apparatus thereof |
| CN205791376U (en) * | 2016-06-27 | 2016-12-07 | 大唐淮北发电厂 | A kind of enclosed busbar anti-condensation equipment for generating set |
-
2019
- 2019-08-28 CN CN201910800637.1A patent/CN110554071A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2534712B2 (en) * | 1987-07-01 | 1996-09-18 | 凸版印刷株式会社 | Conductive film |
| CN2546987Y (en) * | 2002-05-17 | 2003-04-23 | 帅上本 | Bird droppings proof compound insulator |
| CN101527194A (en) * | 2008-03-04 | 2009-09-09 | 华北电力科学研究院有限责任公司 | Contamination-flashover resistance method and contamination-flashover resistance insulated device for rapid contamination accumulation |
| CN204116195U (en) * | 2014-09-22 | 2015-01-21 | 河南宏博测控技术有限公司 | Portable hydrophobic nature proving installation |
| CN105973941A (en) * | 2016-04-29 | 2016-09-28 | 南方电网科学研究院有限责任公司 | Method for measuring damp degree of insulator surface dirt by using angular phase difference, and apparatus thereof |
| CN205791376U (en) * | 2016-06-27 | 2016-12-07 | 大唐淮北发电厂 | A kind of enclosed busbar anti-condensation equipment for generating set |
Non-Patent Citations (3)
| Title |
|---|
| 刘勇 等: "泄漏电流相角变化特征与绝缘子运行状态的相关分析", 《高电压技术》 * |
| 欧希堂 等: "硅橡胶复合绝缘户外互感器的结构设计", 《山东电力技术》 * |
| 阳林 等: "基于相角差检测的绝缘子表面污秽受潮特性", 《高电压技术》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103675434A (en) | System and method for early warning insulator pollution flashover | |
| CN107607439B (en) | Automatic identification device and identification method for icing type of power transmission conductor | |
| Han et al. | Inspection of insulators on high-voltage power transmission lines | |
| CN102680363A (en) | Composite insulator hydrophobicity evaluating device and method based on dynamic drip ultrasound characteristic | |
| CN104267063A (en) | Low-value insulator detection method based on infrared thermography | |
| CN103760129A (en) | Method of detecting aging degree of anti-pollution flashover coating of room temperature vulcanized silicone rubber | |
| CN106596650A (en) | Graphene/cement composite material-based apparatus and method for detecting content of chloride ions in concrete | |
| Mavrikakis et al. | Laboratory investigation on hydrophobicity and tracking performance of field aged composite insulators | |
| CN101706528A (en) | Insulator voltage online measurement sensor for power transmission line | |
| CN102680560A (en) | Method for judging aging of insulator room temperature vulcanization (RTV) coatings | |
| CN108535546A (en) | Insulator surface monitored conductivity system and method | |
| CN103558234B (en) | Detect the method for composite insulator umbrella skirt aging | |
| JP2001231119A (en) | Insulator contamination detector and insulator contamination detecting system | |
| CA2336925A1 (en) | Moisture sensor for layers | |
| CN105785235A (en) | Test method for evaluating alternating current flashover voltage characteristic of insulator | |
| CN105510785A (en) | Suspension insulator low and zero resistance data wireless measurer | |
| CN110554071A (en) | System and method for detecting hydrophobicity of contaminated insulator based on phase angle difference method | |
| CN105973941A (en) | Method for measuring damp degree of insulator surface dirt by using angular phase difference, and apparatus thereof | |
| CA2310020A1 (en) | Method of determining the volumetric proportion of liquid water and the density of snow and a device for carrying out the method | |
| CN203732603U (en) | Insulator pollution flashover alarm system | |
| CN207472972U (en) | A kind of sheet resistance measurement jig | |
| CN207817105U (en) | A kind of electric transmission line isolator pollution flashover automatic visual observation system | |
| CN205786856U (en) | The measurement apparatus of Criterion of Polluted Insulator wetted surfaces electrical conductivity | |
| Fauziah et al. | The effect of coating on leakage current characteristic of coast field aged ceramic insulator | |
| CN115712043A (en) | Damp diagnosis method for cold-shrinkage intermediate joint of distribution cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20191210 |
|
| WD01 | Invention patent application deemed withdrawn after publication |