CN1558249A - Charged detection method for insulator of high voltage direct current transmission line - Google Patents
Charged detection method for insulator of high voltage direct current transmission line Download PDFInfo
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- CN1558249A CN1558249A CNA2004100390013A CN200410039001A CN1558249A CN 1558249 A CN1558249 A CN 1558249A CN A2004100390013 A CNA2004100390013 A CN A2004100390013A CN 200410039001 A CN200410039001 A CN 200410039001A CN 1558249 A CN1558249 A CN 1558249A
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- insulator
- transmission line
- high voltage
- direct current
- voltage direct
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Abstract
The present invention belongs to the field of electric power transmission, and is especially live detection method of synthetic insulator fault and zero value insulator in high voltage DC power transmission line. The detection method includes the steps of: detecting the AC harmonic electric field distribution around the insulator; comparing with standard electric field distribution; and judging whether the insulator is normal or in fault based on whether to have obvious difference between the two distributions. The present invention facilitates the detection of insulator in high voltage DC power transmission line with voltage level as high as 500 KV and has relatively high sensitivity.
Description
Technical field
The invention belongs to the electric power transfer field, the method for particularly a kind of charged detection HVDC (High Voltage Direct Current) transmission line composite insulator defective and zero resistance insulator.
Background technology
The conventional means that detects the HVDC (High Voltage Direct Current) 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.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.And, do not have charged detection method at present for the low null value suspended insulator of HVDC (High Voltage Direct Current) transmission line.
Summary of the invention
The objective of the invention is: provide a kind of highly sensitive, the method for charged detection HVDC (High Voltage Direct Current) transmission line insulator (comprising composite insulator, porcelain insulator and glass insulator) defective easy to use.
Principle of the present invention and technical scheme are: owing to contain when containing zero resistance insulator in conductive defect or the porcelain insulator string when composite insulator, AC harmonic electric field around it distributes and will distort along insulator, so distribute by detecting AC harmonic electric field, and the standard electric field distribution during with zero defect compares, and can judge whether insulator exists defective.That is: a kind of method of charged detection HVDC (High Voltage Direct Current) transmission line insulator the steps include:
(1) detects insulator AC harmonic electric field distribution on every side;
Standard electric field distribution during (2) with zero defect compares;
(3) judge then that as two kinds of no significant differences that distribute insulator is normal, otherwise be judged to be defectiveness.
All more than 500kV, the electric weight of transmission is huge for the present HVDC (High Voltage Direct Current) transmission line electric pressure of China, requires very strict to security performance.Yet 500kV line insulator total length is very big, greatly about about 6 meters, and also far away from the body of the tower of iron tower, the measurement of DC electric field is subjected to the influence of space ion flow and insulator surface resistance very big around the insulator, is difficult for measuring; Select for use AC harmonic electric field as measuring object, electric field method be can be used in detect the high voltage direct current insulator, and reach higher sensitivity.
Description of drawings
Accompanying drawing is a process flow diagram of the present invention.
Embodiment
Embodiment: referring to accompanying drawing, a kind of method of charged detection HVDC (High Voltage Direct Current) transmission line insulator the steps include:
(1) detects insulator AC harmonic electric field distribution on every side;
Standard electric field distribution during (2) with zero defect compares;
(3) judge then that as two kinds of no significant differences that distribute insulator is normal, otherwise be judged to be defectiveness.
Claims (1)
1, a kind of method of charged detection HVDC (High Voltage Direct Current) transmission line insulator is characterized in that, steps of the method are:
(1) detects insulator AC harmonic electric field distribution on every side;
Standard electric field distribution during (2) with zero defect compares;
(3) judge then that as two kinds of no significant differences that distribute insulator is normal, otherwise be judged to be defectiveness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100390013A CN1558249A (en) | 2004-01-20 | 2004-01-20 | Charged detection method for insulator of high voltage direct current transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100390013A CN1558249A (en) | 2004-01-20 | 2004-01-20 | Charged detection method for insulator of high voltage direct current transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1558249A true CN1558249A (en) | 2004-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100390013A Pending CN1558249A (en) | 2004-01-20 | 2004-01-20 | Charged detection method for insulator of high voltage direct current transmission line |
Country Status (1)
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| CN (1) | CN1558249A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893674A (en) * | 2010-07-12 | 2010-11-24 | 沈阳工业大学 | Pollution flashover index forecasting method for regional power grid |
| CN101487866B (en) * | 2008-11-06 | 2010-12-08 | 姚建刚 | On-line detection method for AC power transmission line porcelain zero resistance insulator based on infrared thermal imaging |
| CN102081130A (en) * | 2009-11-30 | 2011-06-01 | 中国移动通信集团宁夏有限公司 | Electrified cable detection method, device and system |
| CN102361250A (en) * | 2011-08-31 | 2012-02-22 | 山东电力研究院 | Field operation and maintenance method for operation composite insulator based on performance evaluation |
| CN102539979A (en) * | 2012-02-07 | 2012-07-04 | 云南电力试验研究院（集团）有限公司电力研究院 | Method for evaluating inner insulation performance of monolithic suspension insulator by testing direct-current leaked currents |
| CN104020343A (en) * | 2014-06-06 | 2014-09-03 | 西安电子科技大学 | High voltage power transmission line live part verification method based on electric field intensity difference distribution curve matching |
| CN104535022A (en) * | 2014-12-15 | 2015-04-22 | 清华大学 | Material deformation detection method and system based on cosmic ray |
| CN106443301A (en) * | 2015-08-07 | 2017-02-22 | 通用电气航空系统有限公司 | Systems, methods and devices for bipolar high voltage direct current ground fault detection |
| CN110824296A (en) * | 2019-11-15 | 2020-02-21 | 国网安徽省电力有限公司黄山市黄山区供电公司 | Power distribution network non-outage operation detection method |
-
2004
- 2004-01-20 CN CNA2004100390013A patent/CN1558249A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101487866B (en) * | 2008-11-06 | 2010-12-08 | 姚建刚 | On-line detection method for AC power transmission line porcelain zero resistance insulator based on infrared thermal imaging |
| CN102081130A (en) * | 2009-11-30 | 2011-06-01 | 中国移动通信集团宁夏有限公司 | Electrified cable detection method, device and system |
| CN102081130B (en) * | 2009-11-30 | 2013-06-05 | 中国移动通信集团宁夏有限公司 | Electrified cable detection method, device and system |
| CN101893674B (en) * | 2010-07-12 | 2012-10-17 | 沈阳工业大学 | Pollution flashover index forecasting method for regional power grid |
| CN101893674A (en) * | 2010-07-12 | 2010-11-24 | 沈阳工业大学 | Pollution flashover index forecasting method for regional power grid |
| CN102361250A (en) * | 2011-08-31 | 2012-02-22 | 山东电力研究院 | Field operation and maintenance method for operation composite insulator based on performance evaluation |
| CN102539979A (en) * | 2012-02-07 | 2012-07-04 | 云南电力试验研究院（集团）有限公司电力研究院 | Method for evaluating inner insulation performance of monolithic suspension insulator by testing direct-current leaked currents |
| CN104020343A (en) * | 2014-06-06 | 2014-09-03 | 西安电子科技大学 | High voltage power transmission line live part verification method based on electric field intensity difference distribution curve matching |
| CN104020343B (en) * | 2014-06-06 | 2016-08-31 | 西安电子科技大学 | High voltage transmission line electricity-testing method based on electric field intensity difference cloth Curve Matching |
| CN104535022A (en) * | 2014-12-15 | 2015-04-22 | 清华大学 | Material deformation detection method and system based on cosmic ray |
| CN106443301A (en) * | 2015-08-07 | 2017-02-22 | 通用电气航空系统有限公司 | Systems, methods and devices for bipolar high voltage direct current ground fault detection |
| CN106443301B (en) * | 2015-08-07 | 2019-12-17 | 通用电气航空系统有限公司 | System, method and device for detecting bipolar high-voltage direct-current ground fault |
| US10569895B2 (en) | 2015-08-07 | 2020-02-25 | Ge Aviation Systems Limited | Systems, methods, and devices for bipolar high voltage direct current ground fault detection |
| CN110824296A (en) * | 2019-11-15 | 2020-02-21 | 国网安徽省电力有限公司黄山市黄山区供电公司 | Power distribution network non-outage operation detection method |
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