CN205450143U - Topography is to test platform of special high tension transmission line shaft tower lightning shielding ability influence - Google Patents
Topography is to test platform of special high tension transmission line shaft tower lightning shielding ability influence Download PDFInfo
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- CN205450143U CN205450143U CN201521131896.3U CN201521131896U CN205450143U CN 205450143 U CN205450143 U CN 205450143U CN 201521131896 U CN201521131896 U CN 201521131896U CN 205450143 U CN205450143 U CN 205450143U
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Abstract
The utility model discloses a topography is to test platform of special high tension transmission line shaft tower lightning shielding ability influence, including electrode, screened room and high -speed photography appearance, still including being located the middle simulation hillside of two shaft tower models. The problem of to many mine fields of hills territory, consider that the 1000kV transmission line shaft tower lightning shielding capability study of the influence of topography is deficienter to lead to can only referring to engineering computational method to transmission line's lightning protection design, the error is great, can not satisfy the demand to the protection of extra -high voltage transmission line completely is solved. Test the assay hillside to the curves who influences hillside parameter and shaft tower lightning shielding ability of transmission line shaft tower lightning shielding ability on this test platform, combines analysis result to be directed against transmission line and take more suitable lightning protection measure.
Description
Technical field
This utility model relates to a kind of UHV transmission line shaft tower, is specifically related to a kind of landform test platform to UHV transmission line shaft tower lightning shielding capacity.
Background technology
China coast area lightening activity is frequent, and 1000kV power transmission line corridor is many through mountain area, and tripping rate with lightning strike is the highest.Operational monitoring data show, because the lightning stroke trip that thunderbolt transmission line of electricity produces occupies the biggest ratio.Dodge data as sample with 167370 thunders and lightnings in Guangzhou that 1999-2008 recorded, find that Plain lightning current average is higher than mountain area lightning current average.The shielding probability of mountain area transmission line of electricity is relatively big, and as a example by reservoir area of Three Gorges, 32 lightning faults that 2002-2010 Three Gorges 500kV electrical network suffers all occur in mountain area, and shielding fault accounts for 90.6%, and the tripping rate with lightning strike of 1000kv transmission line of electricity is higher.Therefore, for hilly and mountainous land area with more lightning activities, it is necessary to carry out regional lightning protection measures, and be necessary the shielding lightning shielding characteristic of area, mountain region electric power line pole tower is done particular study.
Correlational study to thunderbolt, the improvement geometric model of the electric aggregation model EGM, Eriksson that are widely used at present, leader propagation model LPM etc., is engineering calculating method.Along with the electric pressure of transmission line of electricity is more and more higher, the formula drawn under old working condition and calculated conclusion can not adapt to Production requirement under the new situation completely.In order to enable comparatively fast to obtain the correlation properties of electric power line pole tower lightning shielding, the method that simulation test can be used.Naturally discharge although the thunder discharge of simulation test is not proper physical modeling, but there is certain similarity in the rule of electric discharge, can repeat in a large number, it is easy to change the electric power line pole tower simulation test that experimental condition was carried out before both at home and abroad, all carry out on level land, the thunderbolt shielding character of the transmission line of electricity of simulation test plains region, does not consider the impact of hillside landform.For multi-thunder area, hills, there is difference the shielding lightning shielding characteristic of electric power line pole tower and plains region, it should exclusively carry out research.
Utility model content
This utility model mainly solves for area with more lightning activities territory, hills; consider that the 1000kV electric power line pole tower lightning shielding capability study of the influence of topography is deficienter; thus cause the lightning Protection Design for transmission line of electricity can only be with reference to engineering calculating method; error is bigger, it is impossible to the problem fully meeting the demand protected for UHV transmission line.
For solving above-mentioned technical problem, the technical solution adopted in the utility model is: a kind of landform test platform to UHV transmission line shaft tower lightning shielding capacity, high-voltage connection including impulse voltage generator, including electrode, screened room and high-speed camera, also include being positioned at the simulation hillside in the middle of two Tower Models, with the insulator being arranged on described Tower Model, it is erected at the lightning conducter between described two Tower Models and wire, the span of described two Tower Models is 32m, distance between described lightning conducter and wire is 1.32m, described high-speed camera is placed in described screened room, described electrode is connected with the high-voltage connection of described impulse voltage generator, and it is position-movable.
Preferably, described Tower Model contracting ratio is 1:12.5, uses aluminium alloy to make, and turriform is ZB6T shaft tower.
Preferably, described insulator uses 5mm steel wire according to contracting than simulation, described lightning conducter, and described wire uses three-phase eight split conductor, and sub-conductor uses 2.5mm copper wire.
Preferably, described simulation hillside uses ground connection iron railings breast board.
Preferably, the iron of described ground connection iron railings breast board employing 30m × 30m is staggered is welded.
It is further preferred that described electrode uses rod height 5m, a diameter of 60mm, the steel of a diameter of 80mm of club head ball are made.
This utility model has built a research hillside test platform to UHV transmission line lightning shielding capacity, it is tested to the impact analyzing hillside undulating topography to electric power line pole tower lightning shielding ability by this test platform, thus carries out compartmentalization lightning protection measures for the transmission line of electricity in Plain and hilly country and lay the foundation.
Operation principle of the present utility model is: by producing the scale model of UHV transmission line, platform is reasonably arranged, in the case of not changing other conditions, model is applied lightning wave and operation wave impact voltage, the angle of position and hillside by persistently changing electrode, the parameter of research hillside landform, for the impact of electric power line pole tower lightning shielding ability, finally gives power transmission line lightning shielding screening ability and hillside height and the relation curve of angle.
The beneficial effects of the utility model are:
Test platform of the present utility model can comparatively fast obtain UHV transmission line shaft tower and be respectively under operation ripple and lightning wave effect, electric power line pole tower lightning shielding ability and the relation curve of the factor such as the height of hillside landform and the gradient, utilize high-speed camera record experimental phenomena, result is accurate, thus takes the most rational lightning protection measures in Practical Project.
Accompanying drawing explanation
Fig. 1 is this utility model overall framework schematic diagram；
Wherein, 1-insulator, 2-lightning conducter, 3-wire, 4-Tower Model, 5-electrode, 6-high-voltage connection, 7-ground connection iron railings breast board, 8-high-speed camera, 9-screened room；
Fig. 2 (a), (b) are without matched group test schematic diagram during simulation hillside；
Fig. 3 is the test group test schematic diagram with the presence of simulation hillside.
Detailed description of the invention
By combination accompanying drawing described further below it will be further appreciated that feature of the present utility model and advantage.The embodiment provided is only the explanation to this utility model method, and limits remaining content that this utility model discloses never in any form.
As shown in Figure 1, the technical scheme that detailed description of the invention uses is as follows: a kind of landform test platform to UHV transmission line shaft tower lightning shielding capacity, high-voltage connection including impulse voltage generator, including electrode, screened room and high-speed camera, also include being positioned at the simulation hillside in the middle of two Tower Models, with the insulator being arranged on described Tower Model, it is erected at the lightning conducter between described two Tower Models and wire, the span of described two Tower Models is 32m, distance between described lightning conducter and wire is 1.32m, described high-speed camera is placed in described screened room, described electrode is connected with the high-voltage connection of described impulse voltage generator, and it is position-movable.
Described Tower Model contracting ratio is 1:12.5, uses aluminium alloy to make, and turriform is ZB6T shaft tower.
Described insulator uses 5mm steel wire according to contracting than simulation, described lightning conducter, and described wire uses three-phase eight split conductor, and sub-conductor uses 2.5mm copper wire.
Described simulation hillside uses ground connection iron railings breast board.
Described ground connection iron railings breast board uses the iron of 30m × 30m to interlock and is welded.
Described electrode uses rod height 5m, a diameter of 60mm, and the steel of a diameter of 80mm of club head ball are made.
Embodiment 1
By producing the scale model of 1000kV transmission line of electricity, simulation electrode is made with given shape steel, utilize aluminium alloy Tower Model, then platform is reasonably arranged, this test platform carries out the impact on electric power line pole tower lightning shielding ability of the analysis of experiments hillside, hillside parameter and the relation curve of shaft tower lightning shielding ability, binding analysis result takes more suitably lightning protection measures for transmission line of electricity.
The test platform of UHV transmission line shaft tower lightning shielding capacity is included such as lower part by landform, as shown in Figure 1, aluminium alloy is utilized to be fabricated to the UHV transmission line Tower Model 4 of 1:12.5, turriform uses common ZB6T shaft tower, wherein insulator 1 uses true insulator to be simulated according to contracting ratio, lightning conducter 2 uses 5mm steel wire, wire 3 to use three-phase eight split conductor, and sub-conductor uses 2.5mm copper wire；The span of two electric power line pole tower models is 32m, and the distance between each line is 1.32m.Intermediate arrangement at electric power line pole tower model 4 simulates the ground connection iron railings breast board 7 on hillside, hills, and ground connection iron railings breast board 7 uses the iron of 30m × 30m to interlock and is welded；The electrode 5 of test uses rod height 5m, a diameter of 60mm, and the steel of a diameter of 80mm of club head ball are made, and the position of electrode can arbitrarily be moved, and is connected with the high-voltage connection 6 of impulse voltage generator.Test uses high-speed camera 8 to record electric discharge phenomena, and high-speed camera 8 is placed in metallic shielded room 9, prevents the strong electromagnetic damage equipment that electric discharge produces.
Embodiment 2 is without the matched group test in the presence of simulation hillside:
Remove simulation hillside 7, change the position of high-field electrode, be divided into 5 to 6 groups, utilize impulse voltage generator that gap is applied the discharge voltage of 90%～100%.Discharge 50 times under the asynchronous operating mode in simulation electrode position respectively, recording electrode discharges over the ground, discharges lightning conducter 2 and number of times to transmission line of electricity, calculates the ratio that transmission line of electricity is discharged by each operating mode bottom electrode, thus run a curve, as shown in Fig. 2 (a) (b).
Embodiment 3 is with the presence of the test group test on simulation hillside:
As it is shown in figure 1, arrange test site, other conditions are with embodiment 2, and adjust the height simulating hillside 7 accordingly, are divided into five to six groups.Fixed electrode position, utilizes impulse voltage generator that gap is applied the discharge voltage of 90%～100%.Discharge 50 times under the operating mode of simulation hillside different angles respectively, recording electrode discharges over the ground, number of times lightning conducter 2 discharged and transmission line of electricity is discharged, calculate the ratio that transmission line of electricity is discharged by each operating mode bottom electrode, thus run a curve, and respectively the result of embodiment 2 and embodiment 3 is carried out longitudinal comparison, the result of the test of different for embodiment 3 groups is carried out lateral comparison；Applying negative polarity 80/2500 μ s operating impulse voltage, in the case of level land and two kinds of slope, comparison of test results when lightning conducter and upper phase conductor 5m is as shown in Figure 3.
Above-described embodiment, by changing angle and the height of electric power line pole tower on simulation hillside, studies the hillside impact for electric power line pole tower lightning shielding ability；Can be with Reasonable adjustment electrode to transmission line of electricity and distance to the ground, so that the ratio that in result of the test, transmission line of electricity is struck by lightning has significant change；Simulate true transmission line of electricity and thunderbolt environment completely, reduce the impact of other factors, and can conveniently change the parameters such as analog conducting wire, lightning conducter.
Claims (6)
1. the landform test platform to UHV transmission line shaft tower lightning shielding capacity, high-voltage connection including impulse voltage generator, it is characterized in that: include electrode, screened room and high-speed camera, also include the simulation hillside being positioned in the middle of two Tower Models and the insulator being arranged on described Tower Model, it is erected at the lightning conducter between described two Tower Models and wire, the span of described two Tower Models is 32m, distance between described lightning conducter and wire is 1.32m, described high-speed camera is placed in described screened room, described electrode is connected with the high-voltage connection of described impulse voltage generator, and it is position-movable.
The landform the most according to claim 1 test platform to UHV transmission line shaft tower lightning shielding capacity, it is characterised in that: described Tower Model contracting ratio is 1:12.5, uses aluminium alloy to make, and turriform is ZB6T shaft tower.
The landform the most according to claim 1 test platform to UHV transmission line shaft tower lightning shielding capacity, it is characterized in that: described insulator is according to contracting ratio simulation, described lightning conducter uses 5mm steel wire, and described wire uses three-phase eight split conductor, and sub-conductor uses 2.5mm copper wire.
The landform the most according to claim 1 test platform to UHV transmission line shaft tower lightning shielding capacity, it is characterised in that: described simulation hillside uses ground connection iron railings breast board.
The landform the most according to claim 4 test platform to UHV transmission line shaft tower lightning shielding capacity, it is characterised in that: described ground connection iron railings breast board uses the iron of 30m × 30m to interlock and is welded.
The landform the most according to claim 1 test platform to UHV transmission line shaft tower lightning shielding capacity, it is characterised in that: described electrode uses rod height 5m, a diameter of 60mm, and the steel of a diameter of 80mm of club head ball are made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521131896.3U CN205450143U (en) | 2015-12-30 | 2015-12-30 | Topography is to test platform of special high tension transmission line shaft tower lightning shielding ability influence |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521131896.3U CN205450143U (en) | 2015-12-30 | 2015-12-30 | Topography is to test platform of special high tension transmission line shaft tower lightning shielding ability influence |
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| CN205450143U true CN205450143U (en) | 2016-08-10 |
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| CN201521131896.3U Expired - Fee Related CN205450143U (en) | 2015-12-30 | 2015-12-30 | Topography is to test platform of special high tension transmission line shaft tower lightning shielding ability influence |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761292A (en) * | 2018-07-25 | 2018-11-06 | 贵州电网有限责任公司 | One kind being used for transmission line wire lightning current ablation characteristics test system |
| CN109444688A (en) * | 2018-11-15 | 2019-03-08 | 国网山西省电力公司大同供电公司 | A kind of lightning stroke analogue test platform of 10kV power distribution network insulated conductor and screen of trees |
| CN111337796A (en) * | 2018-12-19 | 2020-06-26 | 武汉大学 | Power transmission line lightning shielding failure model test platform and method considering mountain terrain |
-
2015
- 2015-12-30 CN CN201521131896.3U patent/CN205450143U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761292A (en) * | 2018-07-25 | 2018-11-06 | 贵州电网有限责任公司 | One kind being used for transmission line wire lightning current ablation characteristics test system |
| CN109444688A (en) * | 2018-11-15 | 2019-03-08 | 国网山西省电力公司大同供电公司 | A kind of lightning stroke analogue test platform of 10kV power distribution network insulated conductor and screen of trees |
| CN109444688B (en) * | 2018-11-15 | 2020-11-06 | 国网山西省电力公司大同供电公司 | 10kV distribution network insulated conductor and tree obstacle's thunderbolt analogue test platform |
| CN111337796A (en) * | 2018-12-19 | 2020-06-26 | 武汉大学 | Power transmission line lightning shielding failure model test platform and method considering mountain terrain |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160810 Termination date: 20161230 |
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| CF01 | Termination of patent right due to non-payment of annual fee |