CN102969685A - Method for improving lightning prevention and resisting level of overhead power distribution line - Google Patents
Method for improving lightning prevention and resisting level of overhead power distribution line Download PDFInfo
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- CN102969685A CN102969685A CN201210533425XA CN201210533425A CN102969685A CN 102969685 A CN102969685 A CN 102969685A CN 201210533425X A CN201210533425X A CN 201210533425XA CN 201210533425 A CN201210533425 A CN 201210533425A CN 102969685 A CN102969685 A CN 102969685A
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Abstract
The invention discloses a method for improving lightning prevention and resisting level of an overhead power distribution line, and belongs to the field of overhead power distribution lines. The method for improving lightning prevention and resisting level of the overhead power distribution line comprises the following content: accelerating line insulation transformation; installing a lightening prevention insulator on a straight line pole additionally; installing an overvoltage protection circuit additionally on an angle pole; installing arresters additionally on a high-voltage side and a low-voltage side of a power distribution transformer; carrying out a spot check on grounding resistors of lightning hardware fittings and a line overvoltage protector regularly, and recovering unqualified grounding devices of the grounding resistors; and carrying out a spot check on grounding resistors of lightning hardware fittings and a line overvoltage protector regularly, and recovering unqualified grounding devices of the grounding resistors. The method for improving lightning prevention and resisting level of the overhead power distribution line is set about fundamentally, accelerates upgrading, is beneficial to improving the technique equipment level of the integral line, is simple and feasible, is convenient to implement, contributes to popularization, and can be widely applied to the field of the running of the overhead power distribution line and lightning prevention management.
Description
Technical field
The invention belongs to the overhead distribution field, relate in particular to a kind of method for improving the overhead distribution safety in operation.
Background technology
Distribution line extensively distributes, and mostly shaft tower is that the ground height stands still for a long while object, is very easy to be struck by lightning.
Summer in 2010, damage to crops caused by thunder causes certain electric company's distribution line tripping operation 138 times, and its interrupt line 4 times has caused on a large scale to have a power failure.
The result who calculates by theory shows: the electric line of every 100km transmission ﹠ distribution will be struck by lightning 4.5～5 times every year.Power supply enterprise specialty statistics then demonstrates electric power system and breaks down and have a power failure, more than 70% since the circuit that is struck by lightning cause.
The anti-lightning strike broken string level that how to improve distribution line is the urgent and important problem that power supply enterprise faces.
Judge that the line thunder protection performance is good and bad, mainly weigh with tripping rate with lightning strike and lightning withstand level that the former refers to the number of times of the average annual lightning stroke trip of every 100km, the latter refers to be struck by lightning line insulation and amplitude that the maximum lightning current of flashover does not occur.The former is lower, and the latter is higher, represents that all the performance of lightning protection is good.
The tripping operation that causes circuit must possess two conditions: the firstth, and amplitude of lightning current causes that more than or equal to the lightning withstand level of circuit the power frequency flashover occurs in insulation; Second works as the power frequency flashover becomes stable power frequency arc; The atmospheric over-voltage that occurs on the transmission line generally comprises lightning induced voltage and direct lightning strike overvoltage,
Summary of the invention
Technical problem to be solved by this invention provides a kind of method that improves the anti-anti-lightning level of overhead distribution, and it is simple, is convenient to implement successful.
Technical scheme of the present invention is: a kind of method that improves the anti-anti-lightning level of overhead distribution is provided, it is characterized in that the method for described anti-anti-lightning level comprises following content: accelerate the line insulation transformation; At straight line pole mounted with lightning protection insulator; Install the line overvoltage protection device additional at angle pole; High and low pressure side at distribution transformer installs lightning arrester additional; Earth resistance to lightning protection hardware, line overvoltage protection device is regularly taken a sample test, and recovers the underproof earthing device of earth resistance.
The method of described anti-anti-lightning level also comprises: the earth resistance to lightning protection hardware, line overvoltage protection device is regularly taken a sample test, and recovers the underproof earthing device of earth resistance.
Its described lightning arrester is zinc oxide arrester.
Compared with the prior art, advantage of the present invention is:
1. fundamentally set about, accelerate to update, help to promote the technical equipment of whole circuit;
2. simple, be convenient to implement, be easy to be received, help to promote.
Embodiment
Below the present invention will be further described.
The invention provides a kind of method that improves the anti-anti-lightning level of overhead distribution, it is characterized in that the method for described anti-anti-lightning level comprises following content: accelerate the line insulation transformation; At straight line pole mounted with lightning protection insulator; Install the line overvoltage protection device additional at angle pole; High and low pressure side at distribution transformer installs lightning arrester additional; Earth resistance to lightning protection hardware, line overvoltage protection device is regularly taken a sample test, and recovers the underproof earthing device of earth resistance.
The method of described anti-anti-lightning level also comprises: the earth resistance to lightning protection hardware, line overvoltage protection device is regularly taken a sample test, and recovers the underproof earthing device of earth resistance.
Its described lightning arrester is zinc oxide arrester.
By taking above measure, improved the lightning protection level of circuit integral body.
The lightning-caused breaking accident was year by year downward trend in recent years, and comparatively frequently in the situation, 4 10kV circuit lightning-caused breaking accidents only occur in certain electric company's scope at damage to crops caused by thunder this year, have descended 50% than 2004.
The anti-lightning strike breaking protection measure of the distribution line of several comparative maturities:
1, anti-thunder insulator:
The conductivity type discharge insulator installs the metal wire clamp of striking discharging gap and particular design additional at insulated conductor bearing stripping insulation layer.
The power frequency continued flow that lightning flash over causes on this metal wire clamp arcing until cut off by the line switching tripping operation, so that avoid fusing insulated conductor and burn insulator.Its Maintenance free, cost is lower, and shortcoming is to break insulating barrier.
2, zinc oxide arrester (MOA):
Using the MOA circuit also is in recent years extensive Adopts measure of Utilities Electric Co. with the restriction lightning overvoltage, and it can effectively block the induction overvoltage of power frequency continued flow, restriction lightning overvoltage and distribution line.Shortcoming is that protection range is less; The cost of investment of road installing completely is larger; Will break insulating barrier this moment, may occur absolutely
The core water inlet of edge wire, the electrochemical corrosion of conducting wire sag place, thus cause broken string; Because bearing power-frequency voltage for a long time, can cause that valve block wears out etc., must in time safeguard.
3, overhead ground wire:
Conventional method is the shielding protection distribution insulated overhead line with overhead ground wire, and its induced voltage can be down to 1/ (1-k) (k is that coupled system and the impact coefficient between lightning conducter, wire is long-pending).Better and the Maintenance free of this method effect, but the anti-mine effect is relatively poor, also forms easily the circuit counterattack.
4, line overvoltage protection device:
The line overvoltage protection device absorbs the operation principle at the current-limiting arc-extinguishing angle of adopting in Japan and the United States, Europe etc.; by restriction fluid element fast shut-off power frequency continued flow; do not need to come arc extinguishing by circuit breaker trip; can effectively limit lightning overvoltage; power supply quality unaffected and the power supply can not interrupt; can effectively prevent the accidents such as insulator damages, event Broken of Overhead Insulation Lines By Lightning; and the caused switch trip accident of minimizing thunderbolt; it is equivalent to the MOA with external series gap; do not bear at ordinary times working voltage; easy for installation, wire does not need broken skin, and Maintenance free, life-span are longer.But it only can protect the lightning overvoltage that punctures insulated conductor, then can not protect other overvoltage on the circuit, needs the restriction with near the MOA wire terminal or the power equipment.
The present invention can be widely used in operation and the lightning protection management domain of overhead distribution.
Claims (3)
1. one kind is improved the method that overhead distribution is prevented the anti-lightning level, it is characterized in that the method for described anti-anti-lightning level comprises following content:
Accelerate the line insulation transformation;
At straight line pole mounted with lightning protection insulator;
Install the line overvoltage protection device additional at angle pole;
High and low pressure side at distribution transformer installs lightning arrester additional;
Earth resistance to lightning protection hardware, line overvoltage protection device is regularly taken a sample test, and recovers the underproof earthing device of earth resistance.
2. according to the method for the anti-anti-lightning level of raising overhead distribution claimed in claim 1, it is characterized in that the method for described anti-anti-lightning level also comprises:
Earth resistance to lightning protection hardware, line overvoltage protection device is regularly taken a sample test, and recovers the underproof earthing device of earth resistance.
3. according to the method for the anti-anti-lightning level of raising overhead distribution claimed in claim 1, it is characterized in that described lightning arrester is zinc oxide arrester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210533425XA CN102969685A (en) | 2012-12-12 | 2012-12-12 | Method for improving lightning prevention and resisting level of overhead power distribution line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210533425XA CN102969685A (en) | 2012-12-12 | 2012-12-12 | Method for improving lightning prevention and resisting level of overhead power distribution line |
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| CN102969685A true CN102969685A (en) | 2013-03-13 |
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| CN201210533425XA Pending CN102969685A (en) | 2012-12-12 | 2012-12-12 | Method for improving lightning prevention and resisting level of overhead power distribution line |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199518A (en) * | 2013-04-24 | 2013-07-10 | 国家电网公司 | Lightning protection method of distribution line near microwave tower |
| CN103236667A (en) * | 2013-05-15 | 2013-08-07 | 河北冀高电力器材开发有限公司 | Lightning protection method for power supply circuit |
| CN105207154A (en) * | 2015-09-16 | 2015-12-30 | 国家电网公司 | Method for improving anti-thunder level of 10-kV distribution line |
| CN105552781A (en) * | 2016-02-23 | 2016-05-04 | 国家电网公司 | Direct current deicing method of extra-high voltage ground wires |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007209173A (en) * | 2006-02-06 | 2007-08-16 | Hokuriku Electric Power Co Inc:The | Equipment for protecting lightning and surge damage of overhead electric line, and its construction method |
| CN202550447U (en) * | 2012-04-10 | 2012-11-21 | 辽宁省电力有限公司抚顺供电公司 | Lightning arrester for 10kv distribution line |
-
2012
- 2012-12-12 CN CN201210533425XA patent/CN102969685A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007209173A (en) * | 2006-02-06 | 2007-08-16 | Hokuriku Electric Power Co Inc:The | Equipment for protecting lightning and surge damage of overhead electric line, and its construction method |
| CN202550447U (en) * | 2012-04-10 | 2012-11-21 | 辽宁省电力有限公司抚顺供电公司 | Lightning arrester for 10kv distribution line |
Non-Patent Citations (3)
| Title |
|---|
| 崔军朝等: "《配电网实用技术》", 30 November 2011, article "电气接地装置的运行维护" * |
| 林智敏等: "上海城市架空绝缘配电线路防雷的技术措施", 《高电压技术》, vol. 30, no. 9, 30 September 2004 (2004-09-30), pages 73 - 74 * |
| 汤昕: "农网10kV配电变压器的防雷改进措施研究", 《电瓷避雷器》, no. 2, 30 April 2011 (2011-04-30), pages 53 - 56 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199518A (en) * | 2013-04-24 | 2013-07-10 | 国家电网公司 | Lightning protection method of distribution line near microwave tower |
| CN103199518B (en) * | 2013-04-24 | 2015-12-02 | 国家电网公司 | The lightening arresting method of distribution line near microwave tower |
| CN103236667A (en) * | 2013-05-15 | 2013-08-07 | 河北冀高电力器材开发有限公司 | Lightning protection method for power supply circuit |
| CN105207154A (en) * | 2015-09-16 | 2015-12-30 | 国家电网公司 | Method for improving anti-thunder level of 10-kV distribution line |
| CN105552781A (en) * | 2016-02-23 | 2016-05-04 | 国家电网公司 | Direct current deicing method of extra-high voltage ground wires |
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Application publication date: 20130313 |