CN103123832B - A kind of ultra-high/extra-high voltage exchanges umbrella structure of composite insulator - Google Patents
A kind of ultra-high/extra-high voltage exchanges umbrella structure of composite insulator Download PDFInfo
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- CN103123832B CN103123832B CN201310045032.9A CN201310045032A CN103123832B CN 103123832 B CN103123832 B CN 103123832B CN 201310045032 A CN201310045032 A CN 201310045032A CN 103123832 B CN103123832 B CN 103123832B
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- umbellule
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- 239000012212 insulator Substances 0.000 title claims abstract description 55
- 239000002131 composite material Substances 0.000 title claims abstract description 38
- 238000009413 insulation Methods 0.000 claims abstract description 12
- 230000010148 water-pollination Effects 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 12
- 238000005457 optimization Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000009422 external insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 229920000260 silastic Polymers 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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Abstract
The present invention is from optimization umbrella design, raising creepage distance utilance, and provide a kind of ultra-high/extra-high voltage to exchange umbrella structure of composite insulator, described beveled structure is made up of the gamp of equal diameters and the umbellule of equal diameters, and described gamp and umbellule are alternately arranged; The creepage coefficient of described composite insulator is 3.8 ~ 4.2.Adopt the composite insulator of this umbrella shape, it is under hydrophily condition, and the pollution flashover voltage of unit insulation height is higher than being used for the large two little umbrella shape composite insulators of 1000kV UHV demonstration project one; The different pollution level area required string of composite insulator can be reduced in various degree long, thus optimize shaft tower size, significantly save transmission line cost.
Description
Technical field
The invention belongs to high-tension insulator design and manufaction technical field, be specifically related to a kind of ultra-high/extra-high voltage and exchange umbrella structure of composite insulator.
Background technology
Insulator is the requisite part of ultra-high-tension power transmission line, and plain conductor is connected with shaft tower by it, and bears the potential difference between wire and shaft tower simultaneously, ensures transmission line safe and stable operation.After running certain hour, its surface is dirty, under adding the effect of the climatic environment such as dense fog, drizzle, likely can discharge along moistening dirty insulating surface, and even penetrability electric discharge, causes failure of insulation, pollution flashover (hereinafter referred to as pollution flashover) namely occurs.Pollution flashover can cause power outage, produces tremendous economic loss, and therefore insulator resistance to pollution flashover ability is one of most important index weighing its performance quality.
Composite insulator is the one of insulator, has another name called synthetic insulator, and because external insulation adopts silastic material, therefore under condition is wet in dirt, resistance to pollution flashover ability is strong, is widely used in recent years on ultra-high/extra-high voltage transmission line.Electricity east, ultra high voltage 1000kV Anhui is sent in engineering, and porcelain, the glass insulator of composite insulator use amount significantly beyond tradition, also mainly will use composite insulator in UHV Transmission Engineering afterwards.Therefore, composite high voltage insulator resistance to pollution flashover ability is improved significant to ultra-high/extra-high voltage power transmission engineering.
The Flashover Characteristics of composite insulator umbrella shape and its surface hydrophobicity joint effect insulator, when surface hydrophobicity is identical, the design of beveled structure determines composite insulator contamination flashover performance.Under applying the operating mode of same voltage, preferably umbrella design can improve the flashover voltage of unit insulation height, thus shortens the insulated lengths meeting safe operation needs, and then reduces Lifting Method in Pole Tower Integral Hoisting size, significantly saves shaft tower investment.
In prior art, the umbrella design of composite insulator and manufacture, the composite insulator umbrella shape of domestic each manufacturer production differs greatly.Mainly contain isometrical umbrella as shown in Figure 1, large two umbellules as shown in Figure 2 and other umbrella shapes (as large-in-umbellule etc.).
Illustrate that composite insulator commonly uses umbrella shape and parameter below in conjunction with Fig. 1 and Fig. 2, be defined as follows:
Insulator body: the intermediate insulation part of insulator, umbrella stretches out thus;
Umbrella: insulated part outstanding on insulator body, in order to increase creepage distance;
Creepage distance: along insulating surface beeline or beeline sum between two parts of the normal Inhaul operation voltage of insulator;
Insulated lengths: the straight length of the whole insulating body of insulator;
Creepage coefficient/CF: the ratio of the total creepage distance of insulator and insulated lengths, dimensionless.The creepage distance of representation unit insulated lengths is one of important parameter of insulator design;
Umbrella spacing: the axial distance between umbrella umbrella;
Umbrella stretches out: the most edge of umbrella and plug overcoat radial distance.
Existing composite insulator design often pursues larger creepage distance simply, and the umbrella design that less consideration is optimized is improving the effect in pollution flashover voltage, and therefore the pollution flashover voltage of unit insulation height is lower.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, from optimization umbrella design, improve creepage distance utilance, tested by the lifting and lowering method pollution flashover of a large amount of system, the invention provides a kind of ultra-high/extra-high voltage and exchange umbrella structure of composite insulator, adopt the composite insulator of this umbrella shape, it is under hydrophily condition, and the pollution flashover voltage of unit insulation height is higher than being used for the large two little umbrella shape composite insulators of 1000kV UHV demonstration project one; The different pollution level area required string of composite insulator can be reduced in various degree long, thus optimize shaft tower size, significantly save transmission line cost.
In order to realize foregoing invention object, the present invention takes following technical scheme:
There is provided a kind of ultra-high/extra-high voltage to exchange umbrella structure of composite insulator, described beveled structure is made up of the gamp of equal diameters and the umbellule of equal diameters, and described gamp and umbellule are alternately arranged; The creepage coefficient of described composite insulator is 3.8 ~ 4.2.
Preferred version of the present invention is: adjacent umbrella spacing is all not less than 20mm, and the umbrella spacing of described gamp is not less than 70mm and is not more than 100mm.
Another preferred version of the present invention is: adjacent umbrella spacing is all not less than 30mm, and the umbrella spacing of described gamp is not less than 75mm and is not more than 90mm.
Preferred version of the present invention is: the umbrella of described gamp stretches out and is not less than 70mm, and the umbrella of described gamp stretches out the difference of stretching out with the umbrella of umbellule is not less than 20mm.
Another preferred version of the present invention is: the umbrella of described gamp stretches out and is not less than 80mm, and the umbrella of described gamp stretches out the difference of stretching out with the umbrella of umbellule is not less than 30mm.
Preferred version of the present invention is: the ratio that umbrella spacing and its umbrella of described gamp stretch out is not less than 0.8 and is not more than 1.0.
Another preferred version of the present invention is: the ratio that umbrella spacing and its umbrella of described gamp stretch out is not less than 0.85 and is not more than 1.0.
The close 0.1mg/cm of test salt
2, grey close 1.0mg/cm
2and surface is under hydrophily condition, the pollution flashover magnitude of voltage of described compound inslation subunit insulation height is not less than 140kV/m.
Compared with prior art, beneficial effect of the present invention is:
1. umbrella structure of composite insulator provided by the invention reduces the probability between electric arc bridge joint umbrella while increasing creepage distance, thus improves pollution flashover voltage;
2. simultaneously, although consider when designing geavy salt close under the full skirt design creepage distance of closeer distribution higher, to cause between full skirt, easily by electric arc bridge joint, making the feature that pollution flashover voltage declines on the contrary, therefore have chosen suitable creepage coefficient range, make creepage distance utilance high;
3. the present invention adopts optimization umbrella design, and the flashover voltage of the compound inslation subunit insulation height utilizing the present invention to design is high compared with other products, and therefore antifouling work ability is excellent, can save transmission line cost in raising transmission line external insulation reliability simultaneously;
4. applicability of the present invention is wide, can be widely used in and exchange 500kV, 750kV, 1000kV ultra-high/extra-high voltage power transmission engineering composite rod insulator, post composite insulator, the composite sheath of the equipment such as insulation column, inter-phase spacer, lightning arrester.
Accompanying drawing explanation
Fig. 1 is the composite insulator schematic diagram of isometrical umbrella structure in prior art;
Fig. 2 is the composite insulator schematic diagram of large two umbellule structures in prior art;
Fig. 3 is the composite insulator schematic diagram of small one and large one umbrella structure provided by the invention;
Wherein, 1-plug, 2-sheath, 3-gamp full skirt, 4-umbellule full skirt.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As Fig. 3, the invention provides a kind of ultra-high/extra-high voltage and exchange umbrella structure of composite insulator, composite insulator comprises plug 1, sheath 2 and beveled structure, and described beveled structure comprises the gamp of equal diameters and the umbellule of equal diameters, and described gamp and umbellule are alternately arranged; The creepage coefficient of described composite insulator is 3.8 ~ 4.2.
Embodiment 1
Composite insulator structure height is 9000mm, and insulation distance is 8360mm, and creepage distance is 32250mm.The umbrella spacing of gamp is 90mm, and the umbrella of gamp stretches out for 90mm, and the umbrella of umbellule stretches out for 55mm.This insulator can be applicable in 1000kV ultrahigh voltage alternating current transmission lines suspension insulator.
Embodiment 2
Composite insulator structure height is 4400mm, and insulation distance is 4000mm, and creepage distance is 16700mm.The umbrella spacing of gamp is 80mm, and the umbrella of gamp stretches out for 90mm, and the umbrella of umbellule stretches out for 55mm.This insulator can be applicable in 500kV ultrahigh-voltage alternating-current transmission line suspension insulator.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (1)
1. ultra-high/extra-high voltage exchanges a umbrella structure of composite insulator, it is characterized in that: described beveled structure is made up of the gamp of equal diameters and the umbellule of equal diameters, and described gamp and umbellule are alternately arranged; The creepage coefficient of described composite insulator is 3.8 ~ 4.2;
Adjacent umbrella spacing is all not less than 20mm, and the umbrella spacing of described gamp is not less than 70mm and is not more than 100mm;
The umbrella of described gamp stretches out and is not less than 70mm, and the umbrella of described gamp stretches out the difference of stretching out with the umbrella of umbellule is not less than 20mm;
The ratio that umbrella spacing and its umbrella of described gamp stretch out is not less than 0.8 and is not more than 1.0;
The close 0.1mg/cm of test salt
2, grey close 1.0mg/cm
2and surface is under hydrophily condition, the pollution flashover magnitude of voltage of described compound inslation subunit insulation height is not less than 140kV/m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310045032.9A CN103123832B (en) | 2013-02-04 | 2013-02-04 | A kind of ultra-high/extra-high voltage exchanges umbrella structure of composite insulator |
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|---|---|---|---|
| CN201310045032.9A CN103123832B (en) | 2013-02-04 | 2013-02-04 | A kind of ultra-high/extra-high voltage exchanges umbrella structure of composite insulator |
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| CN103123832A CN103123832A (en) | 2013-05-29 |
| CN103123832B true CN103123832B (en) | 2016-02-24 |
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| CN110598368B (en) * | 2019-10-17 | 2022-11-22 | 江苏上上电缆集团有限公司 | Cable withstand voltage test structure design method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101369476A (en) * | 2007-12-21 | 2009-02-18 | 清华大学深圳研究生院 | DC suspension type composite insulator umbrella skirt structure based on contaminated discharge property |
| CN101752042A (en) * | 2009-12-31 | 2010-06-23 | 河北新华高压电器有限公司 | AC hanging-type composite insulator |
| CN102231310A (en) * | 2011-05-31 | 2011-11-02 | 河北新华高压电器有限公司 | Bar-shaped composite insulator |
| CN203165582U (en) * | 2013-02-04 | 2013-08-28 | 中国电力科学研究院 | Super /extra high tension AC composite insulator umbrella shape structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201364781Y (en) * | 2009-03-20 | 2009-12-16 | 抚顺电磁制造有限公司 | 750kV alternating current extra high voltage outdoor solid-core post porcelain insulator |
| CN202512968U (en) * | 2012-04-01 | 2012-10-31 | 江苏南瓷绝缘子有限公司 | Long rod porcelain insulator for overhead line |
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- 2013-02-04 CN CN201310045032.9A patent/CN103123832B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101369476A (en) * | 2007-12-21 | 2009-02-18 | 清华大学深圳研究生院 | DC suspension type composite insulator umbrella skirt structure based on contaminated discharge property |
| CN101752042A (en) * | 2009-12-31 | 2010-06-23 | 河北新华高压电器有限公司 | AC hanging-type composite insulator |
| CN102231310A (en) * | 2011-05-31 | 2011-11-02 | 河北新华高压电器有限公司 | Bar-shaped composite insulator |
| CN203165582U (en) * | 2013-02-04 | 2013-08-28 | 中国电力科学研究院 | Super /extra high tension AC composite insulator umbrella shape structure |
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Effective date of registration: 20160817 Address after: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Patentee after: China Electric Power Research Institute Patentee after: State Grid Corporation of China Patentee after: State Grid Sichuan Electric Power Corporation Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Patentee before: China Electric Power Research Institute Patentee before: State Grid Corporation of China |