CN1185497C - Method for electrified testing high-voltage transmission line insulator - Google Patents
Method for electrified testing high-voltage transmission line insulator Download PDFInfo
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- CN1185497C CN1185497C CNB021585458A CN02158545A CN1185497C CN 1185497 C CN1185497 C CN 1185497C CN B021585458 A CNB021585458 A CN B021585458A CN 02158545 A CN02158545 A CN 02158545A CN 1185497 C CN1185497 C CN 1185497C
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- insulator
- transmission line
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- voltage transmission
- electric field
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Abstract
The present invention particularly relates to a method for detecting defects of a high voltage transmission line insulator in an electrified way, which belongs to the power transmission field. The present invention has the purpose of providing a method for detecting defects of a high voltage transmission line insulator in an electrified way, which has high sensitivity and is used easily. The present invention has the technical scheme that when a composite insulator has a conductance defect or a porcelain insulator string comprises a zero value insulator, the axial distribution and the radial distribution of electric fields around the insulator with a conductance defect or the zero value insulator along the insulator are deformed, so through simultaneously detecting the axial distribution and the radial distribution of the electric fields and respectively comparing with standard electric field distribution without defects, an insulator can be judged to be normal when significant differences are not found, otherwise, the insulator is judged to have a defect.
Description
Technical field
The invention belongs to the electric power transfer field, particularly a kind of method of charged detection high-voltage transmission line insulator defective.
Background technology
The conventional means that detects the ultra-high-tension power transmission line composite insulator at present is that this method can not be seen insulator inherent vice and hidden defective with the binoculars range estimation.Detecting the low null value suspended insulator common tool of ultra-high-tension power transmission line is the spark fork, during detection with two metal contact of spark fork respectively with the iron pin and the chapeau de fer overlap joint of insulator, if insulator dielectric is functional, the voltage breakdown sparking distance that insulator is born, produce spark discharge, operating personnel judge according to the sound of spark discharge whether insulator is good, this method can not be worked under strong noise background, can not detect distance insulator far away, it is big to detect labour intensity piecewise, can produce danger by short circuit good insulation, can not be used to detect composite insulator.Extremely indivedual areas are detected insulator with infrared thermoviewer according to variation of temperature, but can not use down by strong by day background light, and cost is also expensive.Someone is modified into the spark fork can measure the instrument that insulator voltage distributes automatically, but the mechanical part complexity still has short circuit good insulation to produce dangerous possibility, can not be used to detect composite insulator.A kind of high-voltage transmission line insulator detector has been tried out in indivedual countries and regions, the longitudinal electric field distribution curve detected insulator around this instrument only utilized insulator, overcome existing insulator detection means and can not take into account the deficiency of aspects such as versatility, accuracy, simplicity, security and cost, but the method that this instrument adopted determined on the principle its to be positioned at insulator middle part or be positioned at the insulator high-pressure side and near have the flaw detection sensitivity of grading ring lower.
Summary of the invention
The objective of the invention is, provide a kind of highly sensitive, the method for charged detection high-voltage transmission line insulator defective easy to use.
Technical scheme of the present invention is: owing to contain when containing zero resistance insulator in conductive defect or the porcelain insulator string when composite insulator, electric field around it all will distort along insulator axial distribution and radial distribution, so by axial distribution and the radial distribution that detects this electric field simultaneously, and the standard electric field distribution during respectively with zero defect compares, as do not have significant difference, then be judged to be normal; Otherwise, judge that there is defective in insulator.
Because be arranged in insulator (string) middle part or be positioned at insulator (string) high-pressure side and near have the low zero resistance insulator of the conductive defect of composite insulator of grading ring and suspension insulator string more obvious to the distortion of radially Electric Field Distribution generation, thereby utilize the present invention higher to the sensitivity of its detection.
The charged detection high-voltage transmission line insulator of two dimensional electric field method that the present invention proposes, the characteristics that both kept the high-voltage transmission line insulator detector, can detect composite insulator inherent vice and hidden defective and low null value suspended insulator, and can short circuit good insulation, not affected by noise, simplify the operation, alleviated labour intensity, cost is also cheap, improved greatly again to be arranged in insulator (string) middle part or be positioned at insulator (string) high-pressure side and near the detection sensitivity of the low zero resistance insulator of the conductive defect of composite insulator of grading ring and suspension insulator string is arranged.
Description of drawings
Accompanying drawing 1 is an electric field synoptic diagram around the high-voltage transmission line insulator;
Accompanying drawing 2 is a process flow diagram of the present invention.
Embodiment
Referring to accompanying drawing, use step of the present invention and be:
(1) detects the insulator axial distribution and the radial distribution of electric field on every side simultaneously;
(2) compare with the standard electric Flow Field Numerical;
(3) all do not have significant difference as the axial distribution of electric field around the insulator and radial distribution and standard electric field, judge that then insulator is normal, otherwise be judged to be defectiveness.
Claims (1)
1, a kind of method of charged detection high-voltage transmission line insulator is characterized in that, this method may further comprise the steps:
(1) detects the insulator axial distribution and the radial distribution of electric field on every side simultaneously;
(2) compare with the standard electric field distribution;
(3) all do not have significant difference as the axial distribution of electric field around the insulator and radial distribution and standard electric field, judge that then insulator is normal, otherwise be judged to be defectiveness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021585458A CN1185497C (en) | 2002-12-25 | 2002-12-25 | Method for electrified testing high-voltage transmission line insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021585458A CN1185497C (en) | 2002-12-25 | 2002-12-25 | Method for electrified testing high-voltage transmission line insulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1419135A CN1419135A (en) | 2003-05-21 |
| CN1185497C true CN1185497C (en) | 2005-01-19 |
Family
ID=4753128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021585458A Expired - Fee Related CN1185497C (en) | 2002-12-25 | 2002-12-25 | Method for electrified testing high-voltage transmission line insulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1185497C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416283C (en) * | 2005-04-08 | 2008-09-03 | 华北电力大学（北京） | Insulator charged detection instrument and its implement method |
| CN101881804B (en) * | 2009-05-08 | 2013-02-20 | 华北电力科学研究院有限责任公司 | Method and device for detecting composite insulator on line |
| CN102539901A (en) * | 2012-01-10 | 2012-07-04 | 航天科工深圳（集团）有限公司 | Zero resistance insulator string monitoring device and method |
| CN102866314A (en) * | 2012-09-10 | 2013-01-09 | 山东电力集团公司聊城供电公司 | Method for online detecting unfavorable insulator of power transmission circuit |
| CN103439367B (en) * | 2013-09-04 | 2015-09-30 | 国家电网公司 | Composite insulator string live detection equipment |
| CN103809037B (en) * | 2014-02-19 | 2016-08-17 | 广西电网公司电力科学研究院 | The composite insulator test chamber test device of optically-based electric-field sensor |
| CN106383274B (en) * | 2016-09-08 | 2019-01-11 | 华北电力大学 | A kind of transmission line insulator live detection method |
-
2002
- 2002-12-25 CN CNB021585458A patent/CN1185497C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1419135A (en) | 2003-05-21 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050119 Termination date: 20100125 |