CN204102654U - 1000kV transformer station high resistance neutral point zinc oxide arrester - Google Patents
1000kV transformer station high resistance neutral point zinc oxide arrester Download PDFInfo
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- CN204102654U CN204102654U CN201420575335.1U CN201420575335U CN204102654U CN 204102654 U CN204102654 U CN 204102654U CN 201420575335 U CN201420575335 U CN 201420575335U CN 204102654 U CN204102654 U CN 204102654U
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- arrester
- neutral point
- zinc oxide
- high resistance
- transformer station
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Abstract
The utility model discloses a kind of 1000kV transformer station high resistance neutral point zinc oxide arrester, comprise 1 joint unit of an arrester, this joint unit of an arrester inside is provided with four columnar resistance sheet posts parallel with one another, and outer surface cover has high-strength ceramic overcoat; Unit of an arrester upper and lower end is separately installed with terminal board and insulator foot; Separated by backing plate between unit of an arrester lower end and insulator foot, and solid mutually by insulator foot and basis.The use of the utility model in 1000 kilovolt high-voltage AC transmission engineerings, improves equipment protection level, reduces the external insulation level of the main equipments such as transformer, ensure that the security reliability of transmission system and the reliability of long-time running.
Description
One, technical field
The utility model belongs to lightning arrester technical field; be specifically related to a kind of high resistance neutral point zinc oxide arrester be applicable in 1000 kilovolts of AC extra high voltage power transmission engineerings in multiple-circuit on same tower, the external insulation being mainly used in 1000 kv substation protection high resistance neutral point equipment is protected.
Two, background technology
Along with the development of UHV transmission technology, UHV Transmission Engineering constantly builds up throwing
Fortune, UHV transmission will become one of major way of China's electric power transfer.Owing to having saving line corridor, the more high advantage of economy, multiple-circuit on same tower is more and more applied in UHV transmission.High resistance neutral point metal oxide arrester has series of advantages; development potentiality is very large; be the Main way of current countries in the world lightning arrester development, progressively will replace the lightning arrester of traditional band gap, also will be the overvoltage protective device of following ultra high voltage system core.
Three, summary of the invention
The purpose of this utility model provides a kind of high resistance neutral point zinc oxide arrester that can be applicable in 1000 kilovolts of AC extra high voltage power transmission engineerings in multiple-circuit on same tower, fills up the blank of this type of lightning arrester, practical requirement.
For achieving the above object, the technical solution adopted in the utility model is: this lightning arrester comprises 1 joint unit of an arrester, is characterized in: this joint unit of an arrester inside is provided with four columnar resistance sheet posts parallel with one another, and outer surface cover has high-strength ceramic overcoat; Unit of an arrester upper and lower end is separately installed with terminal board and insulator foot; Separated by backing plate between unit of an arrester lower end and insulator foot, and solid mutually by insulator foot and basis.
The use of the utility model in 1000 kilovolt high-voltage AC transmission engineerings, improves equipment protection level, reduces the external insulation level of the main equipments such as transformer, ensure that the security reliability of transmission system and the reliability of long-time running.The utility model---high resistance neutral point zinc oxide arrester has following features: 1, have that non linear coefficient is little, protective feature good, energy absorption capability is strong, through-current capability is large, structure is simple and the advantage such as good stability.Non linear coefficient α value is very little.By 1mA ~ 10kA within the scope of this during electric current in metal oxide valve block, α value is generally between 0.02 ~ 0.06.Under rated voltage effect, the electric current passed through is minimum, therefore can make arrester without gaps.Protective value is good.It does not need gap action, and voltage, once raise, can absorb rapidly overvoltage energy, the development of over-voltage suppression; There is good steepness response characteristic; The performance of gapless Oxide Arrester is subject to the impact of the environmental conditions such as temperature, humidity, air pressure, filth, thus stable performance hardly; 2, substantially without afterflow, operating duty is light, and robust to repeated Motor ability is strong.Voltage-current characteristic is symmetrical, does not have polarity problems.3, discharge capacity is large.Easy absorption energy, does not have the restriction of series gap, only relevant with the intensity of valve block itself.Compare with Sic disc, large 4 ~ 4.5 times of the through-current capability of oxide valve block unit are.Therefore, make lightning arrester with such valve block, not only can limit atmospheric over-voltage, and can be used for Suppressing Switching Overvoltage completely, even can also tolerate (power frequency) in short-term overvoltage of certain duration; 4, structure is simple, and size is little, is easy to produce in enormous quantities, and cost is low.5, anti-pollution characteristic is good, can not affect the performance of lightning arrester owing to changing sleeve surface Potential distribution when filthy or charged cleaning.Meanwhile, because valve block is not by atmosphere environment impact, various dielectric can be adapted to, so be also applicable to the multiple special requirement such as high altitude localities and SF6 fully closed combined electric unit.
Four, accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the utility model unit of an arrester structural representation;
Fig. 3 is the utility model unit of an arrester internal structure schematic diagram.
Five, embodiment
As shown in the figure, the utility model comprises 1 joint unit of an arrester 1, its height overall 3070m, the high 2360m of unit of an arrester 1, maximum exumbrella footpath φ 750mm, gross weight 1774kg.Unit of an arrester 1 inside is provided with four columnar resistance sheet posts parallel with one another, and outer surface cover has high-strength ceramic overcoat 5.Unit of an arrester 1 upper and lower end is separately installed with terminal board 4 and insulator foot 3.Separated by backing plate 2 between unit of an arrester 1 lower end and insulator foot 3, and solid mutually by insulator foot 3 and basis.The umbrella shape of strong porcelain overcoat 5 all adopts the light umbrella structure without rib under gamp 9, umbellule 10, umbrella, its internal diameter φ 500mm, external diameter φ 600mm; Gamp 9 stretches out 75mm, and umbellule 10 stretches out 55mm, and umbrella top rade is 18 °, umbrella angle of declination 8 °, and umbrella spacing 80mm, lightning arrester creepage distance is not less than 6600mm.Resistor disc post is in series by multiple resistor disc 6, and multiple resistor disc 6 is divided into 5 groups by current-sharing connecting plate 7 and aluminium electrode 8, and often group is made up of 8-9 sheet resistor sheet 6.
Technical parameter of the present utility model sees the following form:
Claims (4)
1. a 1000kV transformer station high resistance neutral point zinc oxide arrester, this lightning arrester comprises 1 joint unit of an arrester (1), it is characterized in that: this joint unit of an arrester (1) inside is provided with four columnar resistance sheet posts parallel with one another, and outer surface cover has high-strength ceramic overcoat (5); Unit of an arrester (1) upper and lower end is separately installed with terminal board (4) and insulator foot (3); Separated by backing plate (2) between unit of an arrester (1) lower end and insulator foot (3), and solid mutually by insulator foot (3) and basis.
2. 1000kV transformer station according to claim 1 high resistance neutral point zinc oxide arrester, it is characterized in that: resistor disc post is in series by multiple resistor disc (6), multiple resistor disc (6) is divided into 5 groups by current-sharing connecting plate (7) and aluminium electrode (8), and often group is made up of 8-9 sheet resistor sheet (6).
3. 1000kV transformer station according to claim 1 and 2 high resistance neutral point zinc oxide arrester, is characterized in that: the umbrella shape of strong porcelain overcoat (5) all adopts the light umbrella structure without rib under gamp (9), umbellule (10), umbrella.
4. 1000kV transformer station according to claim 3 high resistance neutral point zinc oxide arrester, is characterized in that: strong porcelain overcoat (5) internal diameter φ 500mm, external diameter φ 600mm; Gamp (9) stretches out 75mm, and umbellule (10) stretches out 55mm, and umbrella top rade is 18 °, umbrella angle of declination 8 °, and umbrella spacing 80mm, lightning arrester creepage distance is not less than 6600mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420575335.1U CN204102654U (en) | 2014-10-08 | 2014-10-08 | 1000kV transformer station high resistance neutral point zinc oxide arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420575335.1U CN204102654U (en) | 2014-10-08 | 2014-10-08 | 1000kV transformer station high resistance neutral point zinc oxide arrester |
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| Publication Number | Publication Date |
|---|---|
| CN204102654U true CN204102654U (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420575335.1U Active CN204102654U (en) | 2014-10-08 | 2014-10-08 | 1000kV transformer station high resistance neutral point zinc oxide arrester |
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| CN (1) | CN204102654U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108766695A (en) * | 2018-05-17 | 2018-11-06 | 平高东芝（廊坊）避雷器有限公司 | A kind of extra-high-voltage alternating current gapless leakage conductor |
-
2014
- 2014-10-08 CN CN201420575335.1U patent/CN204102654U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108766695A (en) * | 2018-05-17 | 2018-11-06 | 平高东芝（廊坊）避雷器有限公司 | A kind of extra-high-voltage alternating current gapless leakage conductor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |