CN104734103A - Alternating current five hundred kilovolt transmission line iron tower and method for adjusting lightning conductor protection angle thereof - Google Patents
Alternating current five hundred kilovolt transmission line iron tower and method for adjusting lightning conductor protection angle thereof Download PDFInfo
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- CN104734103A CN104734103A CN201510162369.7A CN201510162369A CN104734103A CN 104734103 A CN104734103 A CN 104734103A CN 201510162369 A CN201510162369 A CN 201510162369A CN 104734103 A CN104734103 A CN 104734103A
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- lightning
- transmission line
- lightning conducter
- angle
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/20—Spatial arrangements or dispositions of lines or cables on poles, posts or towers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
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Abstract
The invention discloses an alternating current five hundred kilovolt transmission line iron tower and a method for adjusting the lightning conductor protection angle thereof. The iron tower comprises a tower body and a cross arm at the top end of the tower body. The middle and the two ends of the lower side of the cross arm are each connected with an insulator. The lower ends of the insulators at the two ends are each connected with a side phase conductor. The lower end of the insulator in the middle is connected with a middle phase conductor. The two ends of the upper side of the cross arm are connected with lightning conductor supports symmetrically. A plurality of lightning conductor connecting fittings are connected to each lightning conductor support. The lightning conductor protection angle can be adjusted according to actual situations through the multiple lightning conductor connecting fittings. The method for adjusting the lightning conductor protection angle comprises the steps that lightning conductors are connected to the lightning conductor connecting fittings at different positions, different protection angles can be formed on the side phases below the lightning conductors in a guiding mode, pilot running of a period under different protection angles is performed, and the best protection angle is found after analysis and comparison are performed. Accordingly, the best wire shielding protection effect of the lightning conductors is obtained after a transmission line is put into operation, the lightning tripping frequency of the transmission line is effectively decreased, and differential lightning protection is achieved.
Description
Technical field
The present invention relates to a kind of interchange 500 KV transmission lines, be specifically related to the method at a kind of interchange 500 KV transmission line steel towers and adjustment earth-wire protection angle thereof.
Background technology
Rapidly, electrical network overlay area is more and more wider, and a lot of transmission line will cross over the region that some landform are changeable, thunder and lightning takes place frequently for China's power construction development.When meeting with Thunderstorm Weather, the transmission line in these regions is easy to lightning stroke flashover occurs and causes trip accident, and statistics shows, transmission line lightning stroke tripping operation number of times exceedes 50% of total tripping operation number of times, is the biggest threat factor of electric power netting safe running.
At present for power transmission line lightning shielding protection, it is the most basic a kind of measure that steel tower sets up lightning conducter.The Main Function of lightning conducter prevents thunder and lightning from attacking wire directly.Line between lightning conducter and its outboard wire protected and the angle between the vertical line of lightning conducter, be called shielding angle.Shielding angle can be determined according to the lightning parameter of transmission line region and topography and geomorphology, and for interchange 500 KV transmission line, regulations stipulate shielding angle is not more than 15 °.But the lightning conducter rack form of existing iron tower of power transmission line is fixed; article one, transmission line is once design and construction completes; earth-wire protection angle just becomes a fixed value, cannot adjust flexibly according to the postrun actual lightning protection situation change of circuit to earth-wire protection angle.If earth-wire protection angle will be adjusted after transmission line puts into operation, then need to carry out tower head transformation, there is the shortcoming that transformation difficulty is large and cost of investment is high.
Summary of the invention
The object of the present invention is to provide a kind of interchange 500 KV transmission line steel tower of adjustable earth-wire protection angle and the method at adjustment earth-wire protection angle thereof; wire is made to obtain best earth-wire protection angle; effective minimizing transmission line caused by lightning strike number of times, improves power supply reliability.
The invention discloses a kind of interchange 500 KV transmission line steel towers, comprise the cross-arm on tower body and its top, the two ends, downside of cross-arm and middle part are connected to insulator, phase conductor during the insulator lower end difference fillet phase conductor at two ends, middle insulator lower end connect.The two ends, upside of cross-arm are symmetrically connected with lightning conducter support, lightning conducter support are connected to some lightning conducters and connect gold utensil.
Described lightning conducter support comprises the crossbeam of column and its upper end, the lower end of column is connected to the inner side of corresponding end insulator junction on cross-arm, the length direction of crossbeam extends toward the outer end of cross-arm, some lightning conducters connect the length direction of gold utensil on the downside of crossbeam and arrange, wherein the lightning conducter of outermost end connects gold utensil longitudinal centre line and the insulator longitudinal centre line conllinear fixing described limit phase conductor.
As preferably; the downside length direction of described lightning conducter rack beam is furnished with four lightning conducters and connects gold utensil, is 0 °, 5 °, 10 ° and 15 ° is as the criterion when the outer position connecting gold utensil toward interior each lightning conducter is determined to mount successively with lightning conducter to the shielding angle of corresponding side wire below it.
The invention also discloses the method at above-mentioned interchange 500 KV transmission line steel tower adjustment earth-wire protection angle, comprise the following steps:
(1) from the lightning conducter of outermost end on described lightning conducter rack beam connects gold utensil, simultaneously on the lightning conducter rack beam of both sides correspondence position connection gold utensil on hang lightning conducter, make both sides lightning conducter form the shielding angle of 0 °, 5 °, 10 ° and 15 ° respectively to the limit phase conductor of corresponding side;
(2) transmission line is made to continue a cycle of operation under each shielding angle, record the direct attack shaft tower number of times of thunder and lightning in this cycle of operation respectively, attack lightning conducter number of times and shielding wire number of times directly, use conventional method analysis under this shielding angle angle value lightning conducter to the shielding protection effect of wire;
(3) use conventional method this transmission line of comparative analysis lightning conducter under above-mentioned different shielding angle to the shielding protection effect of wire, to find out most suitable earth-wire protection angle, draw up the affecting laws of earth-wire protection angle to transmission line lightning protection effect.
The thunder and lightning environment of every bar transmission line through region is different, and the best protection angle of lightning conducter also can corresponding difference.The present invention arranges lightning conducter support by two ends above cross-arm; lightning conducter support arranges multiple lightning conducter and connects gold utensil; can according to the actual change of lightening activity around steel tower and lightning parameter situation after transmission line puts into operation; the change installation site of lightning conducter on lightning conducter support realizes the flexible adjustment to earth-wire protection angle; to obtain the shielding protection effect of lightning conducter to wire the best; effectively reduce transmission line lightning stroke tripping operation number of times; realize differentiated lightning protection; make every bar transmission line all can obtain best lightning protection effect, improve power supply reliability.Avoiding earth-wire protection angle on prior art transmission line is a fixed value, every bar transmission line can not be made all to obtain the defect of best lightning protection effect difference, it also avoid the tower head investment for trnasforming urban land of prior art and the defect of loss of outage simultaneously.
Article one, transmission line obtains lightning conducter to the best lightning protection angle of wire by carrying out operation test post analysis to different earth-wire protection angle values, and transmission line can obtain best lightning protection effect after putting into operation, and ensures power supply reliability.This method is simple to operate but can be earth-wire protection angle and provide Data support to the quantitative study that transmission line lightning protection effect affecting laws carries out.The optimum earth-wire protection angle of the transmission line obtained by the method, be can be transmission line Thunder Protection and provides guidance.
Accompanying drawing explanation
Fig. 1 is the structural representation of a preferred embodiment of the invention.
Embodiment
Preferred embodiment, as shown in Figure 1, this interchange 500 KV transmission line steel tower disclosed by the invention, comprise the cross-arm 2 on tower body 1 and its top, the two ends, downside of cross-arm 2 and middle part are connected to insulator 3, phase conductor 5 during the insulator 3 lower end difference fillet phase conductor 4 at two ends, middle insulator 3 lower end connect, the two ends, upside of cross-arm 2 are symmetrically connected with lightning conducter support 6.
Lightning conducter support 6 comprises the crossbeam 62 of column 61 and its upper end, the lower end of column 61 is connected to the inner side of corresponding end insulator junction on cross-arm 2, the length direction of crossbeam 62 extends toward the outer end of steel tower cross-arm 2, the downside of crossbeam 62 is furnished with four lightning conducters along its length and connects gold utensil 7, and wherein the lightning conducter of outermost end connects the insulator longitudinal centre line conllinear of gold utensil 7 longitudinal centre line and fixed edge phase conductor 4.
When the crossbeam 62 of same lightning conducter support 6 is determined mount successively with lightning conducter 8 from the outer position connecting gold utensil 7 toward interior each lightning conducter to the shielding angle of corresponding side wire below it be preferably 0 °, 5 °, 10 ° and 15 ° be as the criterion.
The thunder and lightning environment of every bar transmission line through region is different, and the best protection angle of lightning conducter also can corresponding difference.The present invention arranges lightning conducter support by two ends above cross-arm; lightning conducter support arranges multiple lightning conducter and connects gold utensil; can according to the actual change of lightening activity around steel tower and lightning parameter situation after transmission line puts into operation; the change installation site of lightning conducter on lightning conducter support realizes the flexible adjustment to earth-wire protection angle; to obtain the shielding protection effect of lightning conducter to wire the best; effectively reduce transmission line lightning stroke tripping operation number of times; realize differentiated lightning protection; make every bar transmission line all can obtain best lightning protection effect, improve power supply reliability.Avoiding earth-wire protection angle on prior art transmission line is a fixed value, every bar transmission line can not be made all to obtain the defect of best lightning protection effect difference, it also avoid the tower head investment for trnasforming urban land of prior art and the defect of loss of outage simultaneously.
When making steel tower, lightning conducter support is connected gold utensil with lightning conducter all can adopt outsourcing piece, as lightning conducter support can adopt the Hunan China tower material that manufacture of steel structure company produces energetically to assemble, lightning conducter connects the connection gold utensil that gold utensil adopts Chinese Wenzhou Gulifa Electric Co., Ltd. to produce.
Insulator buyable glass insulator, as the glass insulator that Chinese Zi Gong match Deaville toughened glass insulator Co., Ltd produces.
The steel reinforced aluminium conductor that three-phase conducting wire can adopt Chinese golden cup electrician Hengyang Cable Co., Ltd to produce.
The method at the steel tower adjustment earth-wire protection angle of said structure comprises the following steps:
(1) from the lightning conducter of outermost end on described lightning conducter rack beam connects gold utensil, simultaneously on the lightning conducter rack beam of both sides correspondence position connection gold utensil on hang lightning conducter, make both sides lightning conducter form the shielding angle of 0 °, 5 °, 10 ° and 15 ° respectively to the limit phase conductor of corresponding side;
(2) transmission line is made to continue a cycle of operation under each shielding angle, record the direct attack shaft tower number of times of thunder and lightning in this cycle of operation respectively, attack lightning conducter number of times and shielding wire number of times directly, use conventional method analysis under this shielding angle angle value lightning conducter to the shielding protection effect of wire;
(3) use conventional method this transmission line of comparative analysis lightning conducter under above-mentioned different shielding angle to the shielding protection effect of wire, to find out most suitable earth-wire protection angle, draw up the affecting laws of earth-wire protection angle to transmission line lightning protection effect.
Article one, transmission line obtains lightning conducter to the best lightning protection angle of wire by carrying out operation test post analysis to different earth-wire protection angle values, and transmission line can obtain best lightning protection effect after putting into operation, and ensures power supply reliability.This method is simple to operate but can be earth-wire protection angle and provide Data support to the quantitative study that transmission line lightning protection effect affecting laws carries out.The optimum earth-wire protection angle of the transmission line obtained by the method, be can be transmission line Thunder Protection and provides guidance.
Claims (4)
1. one kind exchanges 500 KV transmission line steel towers, comprise the cross-arm on tower body and its top, the two ends, downside of cross-arm and middle part are connected to insulator, phase conductor during the insulator lower end difference fillet phase conductor at two ends, middle insulator lower end connect, it is characterized in that: the two ends, upside of described cross-arm are symmetrically connected with lightning conducter support, lightning conducter support is connected to some lightning conducters and connects gold utensil.
2. interchange as claimed in claim 1 500 KV transmission line steel towers, it is characterized in that: described lightning conducter support comprises the crossbeam of column and its upper end, the lower end of column is connected to the inner side of corresponding end insulator junction on cross-arm, the length direction of crossbeam extends toward the outer end of cross-arm, some lightning conducters connect the length direction of gold utensil on the downside of crossbeam and arrange, wherein the lightning conducter of outermost end connects gold utensil longitudinal centre line and the insulator longitudinal centre line conllinear fixing described limit phase conductor.
3. interchange as claimed in claim 2 500 KV transmission line steel towers; it is characterized in that: the downside length direction of described lightning conducter rack beam is furnished with four lightning conducters and connects gold utensil, when the outer position connecting gold utensil toward interior each lightning conducter is determined to mount successively with lightning conducter, the shielding angle of corresponding side wire below it is 0 °, 5 °, 10 ° and 15 ° and is as the criterion.
4. the method at interchange 500 KV transmission line steel tower adjustment earth-wire protection angle according to claim 1, comprises the following steps:
(1) from the lightning conducter of outermost end on described lightning conducter rack beam connects gold utensil, simultaneously on the lightning conducter rack beam of both sides correspondence position connection gold utensil on hang lightning conducter, make both sides lightning conducter form the shielding angle of 0 °, 5 °, 10 ° and 15 ° respectively to the limit phase conductor of corresponding side;
(2) transmission line is made to continue a cycle of operation under each shielding angle, record the direct attack shaft tower number of times of thunder and lightning in this cycle of operation respectively, attack lightning conducter number of times and shielding wire number of times directly, use conventional method analysis under this shielding angle numerical value lightning conducter to the shielding protection effect of wire;
(3) use conventional method this transmission line of comparative analysis lightning conducter under above-mentioned different shielding angle to the shielding protection effect of wire, to find out most suitable earth-wire protection angle, draw up the affecting laws of earth-wire protection angle to transmission line lightning protection effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510162369.7A CN104734103B (en) | 2015-04-08 | 2015-04-08 | Exchange the method at 500 KV transmission line steel towers and adjustment earth-wire protection angle thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510162369.7A CN104734103B (en) | 2015-04-08 | 2015-04-08 | Exchange the method at 500 KV transmission line steel towers and adjustment earth-wire protection angle thereof |
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| Publication Number | Publication Date |
|---|---|
| CN104734103A true CN104734103A (en) | 2015-06-24 |
| CN104734103B CN104734103B (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510162369.7A Active CN104734103B (en) | 2015-04-08 | 2015-04-08 | Exchange the method at 500 KV transmission line steel towers and adjustment earth-wire protection angle thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394676A (en) * | 2017-09-15 | 2017-11-24 | 杭州清源电力设计有限公司 | A kind of earth-wire protection angle of insulated over-head line determines method and device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1689571A1 (en) * | 1988-11-09 | 1991-11-07 | Od Vi Po Proekt Org | Gantry support of power transmission line |
| JPH0833169A (en) * | 1994-07-11 | 1996-02-02 | Fujikura Ltd | Suspension support and wiring work method for the suspension support |
| CN102957139A (en) * | 2012-10-09 | 2013-03-06 | 李景禄 | Dissymmetry shielding failure preventing protection method of transmission line |
| CN203905588U (en) * | 2013-11-22 | 2014-10-29 | 国家电网公司 | Extra high voltage AC wineglass type tangent tower in heavy ice zone |
| CN104453334A (en) * | 2014-12-04 | 2015-03-25 | 国家电网公司 | Three-loop iron tower of power transmission line |
| CN204552239U (en) * | 2015-04-08 | 2015-08-12 | 国家电网公司 | Exchange 500 KV transmission line steel towers |
-
2015
- 2015-04-08 CN CN201510162369.7A patent/CN104734103B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1689571A1 (en) * | 1988-11-09 | 1991-11-07 | Od Vi Po Proekt Org | Gantry support of power transmission line |
| JPH0833169A (en) * | 1994-07-11 | 1996-02-02 | Fujikura Ltd | Suspension support and wiring work method for the suspension support |
| CN102957139A (en) * | 2012-10-09 | 2013-03-06 | 李景禄 | Dissymmetry shielding failure preventing protection method of transmission line |
| CN203905588U (en) * | 2013-11-22 | 2014-10-29 | 国家电网公司 | Extra high voltage AC wineglass type tangent tower in heavy ice zone |
| CN104453334A (en) * | 2014-12-04 | 2015-03-25 | 国家电网公司 | Three-loop iron tower of power transmission line |
| CN204552239U (en) * | 2015-04-08 | 2015-08-12 | 国家电网公司 | Exchange 500 KV transmission line steel towers |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394676A (en) * | 2017-09-15 | 2017-11-24 | 杭州清源电力设计有限公司 | A kind of earth-wire protection angle of insulated over-head line determines method and device |
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| CN104734103B (en) | 2016-02-10 |
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