CN105116240A - Lightning-protection current discharge channel detection method for power transmission line tower and artificial earth electrode - Google Patents
Lightning-protection current discharge channel detection method for power transmission line tower and artificial earth electrode Download PDFInfo
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- CN105116240A CN105116240A CN201510304409.7A CN201510304409A CN105116240A CN 105116240 A CN105116240 A CN 105116240A CN 201510304409 A CN201510304409 A CN 201510304409A CN 105116240 A CN105116240 A CN 105116240A
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Abstract
The invention proposes a lightning-protection current discharge channel detection method for a power transmission line tower and an artificial earth electrode. The method comprises the steps: 1, measuring a ground resistance value of each tower leg, the grounding resistance value of the whole body of the tower, and a parallel connection value of four tower leg grounding resistors; 2, measuring a current which flows upwards through a lightning conductor contact without cutting off an overhead ground wire, so as to detect the contact resistance value of electrical connection of a lightning conductor with the body of the tower; 3, measuring and analyzing high-frequency grounding resistance characteristics of the tower through scanning testing, and impact grounding resistance during lightning stroke. The method judges whether a lightning-protection system device meets the technical requirements or not through the detection of all resistance values. The method tests the conducting resistance of the tower through a tower earth screen comprehensive testing device, tests the number, lengths, depths, breakage points and terminal points of pre-buried towers through the tower earth screen comprehensive testing device, and achieves the comprehensive testing of lightning-protection indexes of the tower. The method judges whether lightning-protection facility is unblocked or not, and is suitable for the lightning-protection performance testing in a power transmission field.
Description
Technical field
What the present invention proposed is the lightning protection device of power domain, specifically electric power line pole tower and artificial earth electrode's lightning protection current by pass detection method.
Background technology
The earth mat situation of electric power line pole tower has influence on the safe operation of electrical network, grounding requirement has relevant technical indicator according to code, as stake resistance, buried depth, length etc., current is mainly reference quantity with grounding resistance to the detection of earth mat, and the degree of depth of ray and length can only be carried out selective examination and be checked and accepted in shaft tower initial test.
Facilitate domestic and international producer of the same type many at stake resistance at present, but major part all only for method of Testing Earth-Contact Resistance research and development and the detection method of netting artificial earth electrode's parameter over the ground is substantially also in blank at present, but actual lightning protection effect quality is directly related with the channel performance quality of artificial earth electrode and column foot, so to shaft tower and artificial earth electrode comprehensively detection method research is most important fast, thus solve by manpower sampling observation be master, cannot the present situation of complete detection.
Summary of the invention
In order to overcome the shortcoming of prior art, the present invention proposes electric power line pole tower and artificial earth electrode's lightning protection current by pass detection method.The method, by measured resistance value, judges that whether lightning protection current by pass is unimpeded, solves the technical matters of lightning-protection system channels open.
The scheme that technical solution problem of the present invention adopts is:
1, the parallel connection value of the grounding resistance of each column foot and the grounding resistance of Lifting Method in Pole Tower Integral Hoisting and four tower footing resistances is measured;
2, need not aerial earth wire be disconnected, measure the electric current upwards flowing through lightning conducter contact, to detect the electrical connection contact resistance of lightning conducter and shaft tower tower body;
3, sweep check used, measures, analyze the stake resistance characteristic of transmission tower high frequency, impulse earthed resistance during thunderbolt.
By the detection of each resistance value, judge whether lightning-protection system device meets technical requirement.
Good effect, the present invention adopts shaft tower earth mat comprehensive test device to test conducting resistance, pre-buried radical, length, the degree of depth, breakpoint and the terminal laid of employing shaft tower earth mat comprehensive test device test of shaft tower, comprehensively tests shaft tower lightning protection index.Judge that whether lightning protection facility is unimpeded.The suitable method application as the test of field of power transmission lightning protection properties.
Embodiment
1, the parallel connection value of the grounding resistance of each column foot and the grounding resistance of Lifting Method in Pole Tower Integral Hoisting and four tower footing resistances is measured;
2, need not aerial earth wire be disconnected, measure the electric current upwards flowing through lightning conducter contact, to detect the electrical connection contact resistance of lightning conducter and shaft tower tower body;
3, sweep check used, measures, analyze the stake resistance characteristic of transmission tower high frequency, impulse earthed resistance during thunderbolt.
By the detection of each resistance value, judge whether lightning-protection system device meets technical requirement.
Know-why:
Device adopts inductive electromagnetic method and test signal analyzing and processing method detection principle, inductive electromagnetic method detection is that main physical property is basic according to the electric conductivity of ground connection ray and surrounding medium and magnetic conductivity difference, observe according to Maxwell's Theory of Electromagnetic Field and electromagnetic induction principle and research electromagnetic field space distribution rule, and then reach the object of detection ground connection ray.Signal source GNK-190XA is provided with humorous time-dependent current signal, sets up humorous varying magnetic field around it, claims primary field.Ground connection ray, under the excitation of humorous varying magnetic field, forms humorous time-dependent current, and the ray with humorous time-dependent current forms again humorous varying magnetic field around it, claims secondary field.The size of secondary field is relevant with transmitting field source form, size of current, frequency height, ray physical property and the factor such as geometric configuration, point position.During with electromagnetic exploration ground connection ray, carry out detected ray by the change measuring secondary field.
Claims (1)
1. electric power line pole tower and artificial earth electrode's lightning protection current by pass detection method, is characterized in that:
1) the parallel connection value of the grounding resistance of each column foot and the grounding resistance of Lifting Method in Pole Tower Integral Hoisting and four tower footing resistances, is measured;
2), need not aerial earth wire be disconnected, measure the electric current upwards flowing through lightning conducter contact, to detect the electrical connection contact resistance of lightning conducter and shaft tower tower body;
3), sweep check used, measures, analyze the stake resistance characteristic of transmission tower high frequency, impulse earthed resistance during thunderbolt;
By the detection of each resistance value, judge whether lightning-protection system device meets technical requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510304409.7A CN105116240A (en) | 2015-06-05 | 2015-06-05 | Lightning-protection current discharge channel detection method for power transmission line tower and artificial earth electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510304409.7A CN105116240A (en) | 2015-06-05 | 2015-06-05 | Lightning-protection current discharge channel detection method for power transmission line tower and artificial earth electrode |
Publications (1)
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| CN105116240A true CN105116240A (en) | 2015-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510304409.7A Pending CN105116240A (en) | 2015-06-05 | 2015-06-05 | Lightning-protection current discharge channel detection method for power transmission line tower and artificial earth electrode |
Country Status (1)
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| CN (1) | CN105116240A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680632A (en) * | 2016-12-30 | 2017-05-17 | 杭州后博科技有限公司 | Iron tower lightning protection performance detection method based on electromagnetic radiation abnormity determination and system |
| CN114295871A (en) * | 2021-12-30 | 2022-04-08 | 国网湖南省电力有限公司 | Non-excavation detection method and system for grounding grid of transmission high-voltage line tower |
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| CN1828313A (en) * | 2006-02-21 | 2006-09-06 | 武汉高压研究所 | Pole tower earthing resistance quick testing method without unfastening wire and device |
| CN102680798A (en) * | 2012-02-28 | 2012-09-19 | 山东建筑大学 | Online measurement method and device for grounding resistor of rod tower |
| CN204044250U (en) * | 2014-05-14 | 2014-12-24 | 国家电网公司 | A kind of multi-frequency scanning formula pole tower ground resistance measurement mechanism |
| CN104569693A (en) * | 2015-01-28 | 2015-04-29 | 贵州电网公司输电运行检修分公司 | Testing system for transmission tower leakage current and earth screen flow leakage channel |
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2015
- 2015-06-05 CN CN201510304409.7A patent/CN105116240A/en active Pending
Patent Citations (5)
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| JP2002131347A (en) * | 2000-10-24 | 2002-05-09 | Nippon Telegraph & Telephone East Corp | Grounding resistance measurement device and its method |
| CN1828313A (en) * | 2006-02-21 | 2006-09-06 | 武汉高压研究所 | Pole tower earthing resistance quick testing method without unfastening wire and device |
| CN102680798A (en) * | 2012-02-28 | 2012-09-19 | 山东建筑大学 | Online measurement method and device for grounding resistor of rod tower |
| CN204044250U (en) * | 2014-05-14 | 2014-12-24 | 国家电网公司 | A kind of multi-frequency scanning formula pole tower ground resistance measurement mechanism |
| CN104569693A (en) * | 2015-01-28 | 2015-04-29 | 贵州电网公司输电运行检修分公司 | Testing system for transmission tower leakage current and earth screen flow leakage channel |
Non-Patent Citations (1)
| Title |
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| 胡毅: "《输电线路运行故障分析与防治》", 31 July 2007 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680632A (en) * | 2016-12-30 | 2017-05-17 | 杭州后博科技有限公司 | Iron tower lightning protection performance detection method based on electromagnetic radiation abnormity determination and system |
| CN106680632B (en) * | 2016-12-30 | 2021-01-08 | 杭州后博科技有限公司 | Iron tower lightning protection performance detection method and system based on electromagnetic radiation abnormity judgment |
| CN114295871A (en) * | 2021-12-30 | 2022-04-08 | 国网湖南省电力有限公司 | Non-excavation detection method and system for grounding grid of transmission high-voltage line tower |
| CN114295871B (en) * | 2021-12-30 | 2023-07-14 | 国网湖南省电力有限公司 | Method and system for detecting non-excavation of grounding grid of high-voltage transmission line tower |
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Application publication date: 20151202 |