CN102306919A - Anti-corona sphere for power transmission line in high altitude region - Google Patents
Anti-corona sphere for power transmission line in high altitude region Download PDFInfo
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- CN102306919A CN102306919A CN201110137653A CN201110137653A CN102306919A CN 102306919 A CN102306919 A CN 102306919A CN 201110137653 A CN201110137653 A CN 201110137653A CN 201110137653 A CN201110137653 A CN 201110137653A CN 102306919 A CN102306919 A CN 102306919A
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- corona
- transmission line
- high altitude
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- dizziness ball
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Abstract
The invention provides an anti-corona sphere for a power transmission line in a high altitude region, and belongs to the field of overhead mounting of electric wires or cables. The anti-corona sphere provided by the invention is suitable to be arranged on a suspension string yoke plate of the 330kV power transmission line in the high altitude region. By the anti-corona sphere, the end parts of the yoke plate, and bolts and pints at the top of a suspension clamp connected with the yoke plate are covered, an overall shielding function in the combination part of the yoke plate and the clamp is realized, the radius of curvature of a connecting part between the yoke plate and the suspension clamp is indirectly increased, the suspension clamp is endowed with a regular circular surface in shape, the field intensity distribution of the surface is effectively improved and the maximum field intensity of the surface is reduced, thereby suppressing the corona discharging of a tip and reducing the corona noises and corona loss of the power transmission line. The anti-corona sphere comprises a sphere shell, hanging plates, a mounting hole, hanging holes and a baffle plate. The anti-corona sphere provided by the invention is cast and molded from an aluminum alloy material, has a small volume, light weight and low manufacture cost, and is convenient to arrange.
Description
Technical field
The invention belongs to the built on stilts installing area of electric wire or cable, specifically relate to a kind of anti-dizziness ball that is used for the high altitude localities transmission line.
Background technology
Western China is located in the plateau, to west area geographical features and energy development planning thereof, to the increasing demand increase of electric power.Yet along with the increase of height above sea level, high height above sea level corona problem is very outstanding, and the corona effects such as corona loss that cause of corona discharge, can influence the safety and economic operation of transmission line.Therefore, the problem of the anticorona discharge of high altitude localities transmission line and corona noise is very necessary.
The generation of corona is because rough conductor produces uneven electric field; Near the electrode that radius of curvature is little around uneven electric field; When voltage is elevated to certain value, electrode surface electric field strength surpasses the breakdown strength of air molecule will discharge, and forms corona.Corona is wanted consumed energy, and the pulse electromagnetic wave that corona discharge produces can produce interference to radio and HF communication; Conductive surface is corroded, thereby reduce the useful life of conductor.At present, the electromagnetic environment problem has become high altitude localities transmission line design, construction and the key factor that must consider in service.
Corona noise is by conductor partial discharge or corona and produce; The height and the transmission line height above sea level of living in of it and electric pressure are closely related, and electric pressure is high, and electrical wiring is complicated; Then the local field strength on energized conductor surface is high more, the easy more generation of partial discharge or corona; The gold utensil in the high more area of height above sea level, corona discharge appears in its surface more easily.
The design of charged gold utensil is relevant with its surface work field intensity with applicable elements, and the work field intensity is higher than the bloom field intensity when the surface, will produce corona discharge on the gold utensil surface.The size and the gold utensil structure of gold utensil work field intensity are closely related, and research shows, the position that gold utensil surface curvature radius is more little; Under identical voltage effect, its surface work field intensity is high more, and corona discharge appears in this place more easily; Thereby produce corona noise and electric energy loss, be unfavorable for energy-conserving and environment-protective.
Transmission line is under nominal operating conditions, and the periphery of lead and gold utensil can produce bigger electric field strength.Find that through test when height above sea level surpassed 1500 meters, the dangle combination form of yoke plate and suspension clamp of the conventional triangular form of 330kV transmission line was unfavorable for anti-corona.Reason is a yoke plate with wire clamp is to be connected and fastening through external bolt, pin, and the surface curvature radius of bolt and pin is all less, and under the effect of power frequency electric field, this joint portion tends to occur obvious most advanced and sophisticated corona discharge and corona noise.
Present method for high altitude localities control corona is mainly through special construction design and realizes; For example Granted publication number is CN2245288Y; Denomination of invention is the utility model patent of " transmission line suspension clamp "; Its technical scheme is: body rim portion and bight are slick and sly streamlined; The radius of curvature of the lower lips at its main body two ends is the 8-20 millimeter, and the U-shaped connector is inclusive in the main body; The technical problem that solves is: the gold utensil of this particular design is specially adapted to the 500kV extra high voltage network of heavy duty, big retaining distance, high height above sea level, serious ice-covering area.
Above-mentioned technology mainly is the improvement of gold utensil structure, and its improvement effect is limited.
Summary of the invention
The object of the invention is to provide a kind of anti-dizziness ball that is used for 330kV transmission line suspension insulator triangular form yoke plate end, high altitude localities; Through this anti-dizziness ball is installed; The yoke plate end is reached the suspension clamp top bolt, the pin that link to each other with yoke plate to be covered; Joint portion to yoke plate and wire clamp forms the bulk shielding effect; Make it have the regular circular surface in shape; Effectively having improved the gold utensil surface electric field intensity distributes; Reduced surperficial maximum field strength; Thereby suppressed most advanced and sophisticated corona discharge, reduced transmission line corona noise and corona loss.
For realizing the foregoing invention purpose, the present invention adopts following technical scheme:
A kind of anti-dizziness ball that is used for the high altitude localities transmission line; Said anti-dizziness ball comprises spherical shell, link plate and plate washer; Its improvements are that said spherical shell is provided with installing hole; Inside and said link plate that said link plate is fixed in said spherical shell are provided with hanging hole, and said baffle plate is installed on the bottom of said spherical shell; Said anti-dizziness ball is by the aluminum alloy materials casting.
Another optimal technical scheme of the present invention is: the spherical shell of said anti-dizziness ball has gap.
Another optimal technical scheme of the present invention is: the end of the spherical shell of said anti-dizziness ball has gap.
An optimal technical scheme more of the present invention is: the quantity of said link plate is two and parallel placement, and the distance between the two parallel link plates is greater than the width of said gap along the spherical shell weft direction.
An optimal technical scheme more of the present invention is: the diameter of said installing hole is greater than the diameter of said hanging hole.
An optimal technical scheme more of the present invention is: said baffle plate is installed on the bottom that has said gap of said spherical shell, and the width of said baffle plate is greater than the width of said gap along the spherical shell weft direction.
An optimal technical scheme more of the present invention is: said baffle plate casting or be welded on said spherical shell and the link plate.
An optimal technical scheme more of the present invention is: said anti-dizziness ball is pressed GB 1173-1995 Birmasil, adopts the aluminium alloy manufacturing of disposable type.
Owing to adopted technique scheme, compared with prior art, beneficial effect of the present invention comprises:
1, effectively suppresses the corona discharge phenomenon, play the effect of energy-saving and noise-reducing
The radius of curvature of anti-dizziness ball spherical shell is not less than 50mm; Inside dimension is relevant with the triangular form yoke plate size of the insulator string that matches; The design of anti-dizziness ball makes yoke plate end and the suspension clamp top bolt, the pin that link to each other with yoke plate cover; Joint portion to yoke plate and wire clamp forms the bulk shielding effect; The increase wire clamp surface curvature radius that anti-dizziness ball is indirect; Its surface field is evenly distributed, can effectively suppresses the corona discharge of 330kV transmission line suspension insulator triangular form yoke plate end, high altitude localities; Prevented and treated because noise and the electric energy loss that corona produces;
2, simple in structure, volume is little, in light weight, easy for installation
Anti-dizziness ball according to the invention is made up of spherical shell, link plate and baffle plate, and is simple in structure, anti-dizziness ball aluminum alloy materials casting, and material is light; And the anti-dizziness ball course of processing is optimized, and production cost is low.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further specified.
Fig. 1 is the spherical sketch map in the whole top of anti-dizziness ball;
Fig. 2 is that anti-dizziness ball is installed in the profile on the suspension insulator triangular form yoke plate;
Fig. 3 is the end view after anti-dizziness ball and yoke plate, wire clamp are installed;
Reference numeral:
The 1-spherical shell, the 2-link plate, the 3-installing hole, the 4-hanging hole, the 5-baffle plate, the 6-yoke plate, 7-wire clamp link plate, 8-adds stay bolt, the 9-gap.
Embodiment
The present invention is through the three-dimensional finite element method; Set up the suspension insulator Simulation Calculation, analyze its gold utensil surface field and distribute, take suitable optimized Measures; Design a kind of anti-dizziness ball that is used with the triangular form yoke plate, thereby reduce the corona noise and the corona loss of transmission line.Through laboratory corona test and hanging net operation checking on the pilot circuit, this anti-dizziness ball has good anti-corona performance, can effectively reduce line corona noise and corona loss; Be applicable to high altitude localities 330kV transmission line, the electromagnetic environment of improving the high altitude localities transmission line is played significant effect.
Below in conjunction with specific embodiment, anti-dizziness ball according to the invention is further illustrated:
Embodiment 1:
This anti-dizziness ball overall appearance is spherical; Inner hollow; Form by the aluminum alloy materials casting; Mainly comprise: spherical shell 1, link plate 2 and plate washer 5; Wherein spherical shell 1 top is hemisphere, and the bottom is cylindrical, and a side of spherical shell 1 is provided with installing hole 3; Link plate 2 is provided with hanging hole 4, is depicted as the spherical sketch map of the anti-dizziness ball first half like accompanying drawing 1.
Accompanying drawing 2 is for anti-dizziness ball is installed in the profile on the suspension insulator triangular form yoke plate, and the element that wherein relates to insulator hardware string part has yoke plate 6, wire clamp link plate 7 and adds stay bolt 8.
The cylindrical outer surface radius of the top hemisphere of spherical shell 1 and Lower Half all is not less than 50mm, and outer wall thickness 5mm, the height of lower cylindrical shape will guarantee to install its lower plane of back a little less than the yoke plate lower plane.The radius of curvature of its function yoke plate that has been indirect increase and wire clamp connecting portion reduces surperficial maximum field strength, thereby suppresses the generation of corona.
Installing hole 3 is positioned at the side of anti-dizziness ball, and the aperture needs greater than the outer end diameter that adds stay bolt 8.Adding stay bolt 8 will be inserted into anti-dizziness ball inside through installing hole 3 and install and fix.
Hanging hole 4 is positioned at the central authorities of link plate 2, and its aperture is greater than the screw rod external diameter that adds stay bolt 8.Link plate 2 is that anti-dizziness ball is mounted and fixed on the yoke plate with the acting in conjunction of hanging hole 4.
Plate washer 5 thick 5mm, its effect is to prevent that anti-dizziness ball from rotating along the horizontal path direction in the yoke plate end, prevents that promptly anti-dizziness ball is along rotating in the plane that is parallel to link plate 2.
Accompanying drawing 3 is the end view after anti-dizziness ball and yoke plate, wire clamp are installed.
Embodiment 2:
The preparation material of anti-dizziness ball according to the invention can be selected the ZL-102 aluminum alloy materials for use, about the ZL-102 aluminum alloy materials, introduces as follows:
Title material: ZAlSi12
Alloy code name: ZL102
Standard: GB/T 1173-1995
The characteristic and the scope of application:
Not heat-treatable strengthened, the casting character of this alloy is good, no hot tearing and loose tendency, and air-tightness is higher.Its density is little, and corrosion resistance is good, can be subjected to atmosphere. and use in the environment of seawater corrosion, can bear red fuming nitric acid (RFNA) in the environment of industrial atmosphere. the corrosiveness of hydrogen peroxide etc.; Welding performance might as well.But the mechanical property of this alloy is low, and thermal endurance and machinability are poor.
Chemical analysis:
Silicon Si:10.0-13.0
Aluminium Al: surplus
Iron (sand casting): 0.000～0.700
Iron (permanent mold casting): 0.000～1.000
Copper Cu :≤0.30 (impurity)
Manganese Mn :≤0.5 (impurity)
Magnesium Mg:0≤0.10 (impurity)
Zinc Zn :≤0.1 (impurity)
Titanium Ti :≤0.20 (impurity)
Annotate: impurity summation: (sand casting)≤2.0; (permanent mold casting)≤2.2
Mechanical property:
Tensile strength sigma
b(MPa):>=145
Percentage elongation δ
5(%):>=4
Hardness (HB): >=50 (5/250/30)
Casting method:
Sand casting adds rotten processing, permanent mold casting adds rotten processing, model casting.
Invention has been described according to specific exemplary embodiment here.It will be conspicuous under not departing from the scope of the present invention, carrying out suitable replacement to one skilled in the art or revise.Exemplary embodiment only is illustrative, rather than to the restriction of scope of the present invention, scope of the present invention is by appended claim definition.
Claims (8)
1. anti-dizziness ball that is used for the high altitude localities transmission line; Said anti-dizziness ball comprises spherical shell (1), link plate (2) and plate washer (5); It is characterized in that said spherical shell (1) is provided with installing hole (3); Inside and said link plate (2) that said link plate (2) is fixed in said spherical shell (1) are provided with hanging hole (4), and said baffle plate (5) is installed on the bottom of said spherical shell (1); Said anti-dizziness ball is by the aluminum alloy materials casting.
2. a kind of anti-dizziness ball that is used for the high altitude localities transmission line as claimed in claim 1 is characterized in that the spherical shell (1) of said anti-dizziness ball has gap (9).
3. a kind of anti-dizziness ball that is used for the high altitude localities transmission line as claimed in claim 2 is characterized in that the end of the spherical shell (1) of said anti-dizziness ball has gap (9).
4. a kind of anti-dizziness ball that is used for the high altitude localities transmission line as claimed in claim 1 or 2; The quantity that it is characterized in that said link plate (2) is two and parallel placement, and the distance between the two parallel link plates (2) is greater than the width of said gap (9) along spherical shell (1) weft direction.
5. a kind of anti-dizziness ball that is used for the high altitude localities transmission line as claimed in claim 1 is characterized in that the diameter of the diameter of said installing hole (3) greater than said hanging hole (4).
6. a kind of anti-dizziness ball that is used for the high altitude localities transmission line as claimed in claim 1 or 2; It is characterized in that said baffle plate (5) is installed on the bottom that has said gap (9) of said spherical shell (1), the width of said baffle plate (5) is greater than the width of said gap (9) along spherical shell (1) weft direction.
7. a kind of anti-dizziness ball that is used for the high altitude localities transmission line as claimed in claim 1, it is characterized in that said baffle plate (5) casting or be welded in said spherical shell (1) and link plate (2) on.
8. a kind of anti-dizziness ball that is used for the high altitude localities transmission line as claimed in claim 1 is characterized in that said anti-dizziness ball by GB 1173-1995 Birmasil, adopts the aluminium alloy manufacturing of disposable type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110137653.0A CN102306919B (en) | 2011-05-25 | 2011-05-25 | Anti-corona sphere for power transmission line in high altitude region |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110137653.0A CN102306919B (en) | 2011-05-25 | 2011-05-25 | Anti-corona sphere for power transmission line in high altitude region |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102306919A true CN102306919A (en) | 2012-01-04 |
| CN102306919B CN102306919B (en) | 2015-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110137653.0A Active CN102306919B (en) | 2011-05-25 | 2011-05-25 | Anti-corona sphere for power transmission line in high altitude region |
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| Country | Link |
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| CN (1) | CN102306919B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296622A (en) * | 2013-05-27 | 2013-09-11 | 国家电网公司 | Shield ball fitting for converter station valve hall |
| CN103837710A (en) * | 2014-03-12 | 2014-06-04 | 国家电网公司 | Anti-corona device of electronic measurement system under ultrahigh voltage electric field environment |
| CN108649513A (en) * | 2018-05-27 | 2018-10-12 | 徐峰 | Reduce the mask of corona discharge |
| CN108666955A (en) * | 2018-05-27 | 2018-10-16 | 徐峰 | Reduce the device of transmission of electricity wire clamp corona discharge |
| CN108736424A (en) * | 2018-05-27 | 2018-11-02 | 徐峰 | The anticorona mask of wire clamp |
| CN108736462A (en) * | 2018-05-27 | 2018-11-02 | 徐峰 | Reduce the device of corona discharge |
| US10992201B2 (en) | 2017-08-07 | 2021-04-27 | General Electric Company | Electrical propulsion system with corona suppression on a vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3046327A (en) * | 1959-06-10 | 1962-07-24 | Ohio Brass Co | Corona ball |
| CN2245286Y (en) * | 1995-07-28 | 1997-01-15 | 成都电力金具总厂 | Anti-dizziness ball for transmission line |
-
2011
- 2011-05-25 CN CN201110137653.0A patent/CN102306919B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3046327A (en) * | 1959-06-10 | 1962-07-24 | Ohio Brass Co | Corona ball |
| CN2245286Y (en) * | 1995-07-28 | 1997-01-15 | 成都电力金具总厂 | Anti-dizziness ball for transmission line |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296622A (en) * | 2013-05-27 | 2013-09-11 | 国家电网公司 | Shield ball fitting for converter station valve hall |
| CN103296622B (en) * | 2013-05-27 | 2016-08-10 | 国家电网公司 | A kind of shield ball fitting for converter station valve hall |
| CN103837710A (en) * | 2014-03-12 | 2014-06-04 | 国家电网公司 | Anti-corona device of electronic measurement system under ultrahigh voltage electric field environment |
| CN103837710B (en) * | 2014-03-12 | 2017-12-01 | 国家电网公司 | The corona-proofing device of electronic measurement system under a kind of extra-high voltage electric field environment |
| US10992201B2 (en) | 2017-08-07 | 2021-04-27 | General Electric Company | Electrical propulsion system with corona suppression on a vehicle |
| CN108649513A (en) * | 2018-05-27 | 2018-10-12 | 徐峰 | Reduce the mask of corona discharge |
| CN108666955A (en) * | 2018-05-27 | 2018-10-16 | 徐峰 | Reduce the device of transmission of electricity wire clamp corona discharge |
| CN108736424A (en) * | 2018-05-27 | 2018-11-02 | 徐峰 | The anticorona mask of wire clamp |
| CN108736462A (en) * | 2018-05-27 | 2018-11-02 | 徐峰 | Reduce the device of corona discharge |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102306919B (en) | 2015-06-24 |
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Owner name: STATE ELECTRIC NET CROP. Effective date: 20130520 |
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Effective date of registration: 20130520 Address after: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Applicant after: China Electric Power Research Institute Applicant after: State Grid Corporation of China Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Applicant before: China Electric Power Research Institute |
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