CN202217555U - 500kV transmission line insulator with protective gap - Google Patents
500kV transmission line insulator with protective gap Download PDFInfo
- Publication number
- CN202217555U CN202217555U CN2011203304852U CN201120330485U CN202217555U CN 202217555 U CN202217555 U CN 202217555U CN 2011203304852 U CN2011203304852 U CN 2011203304852U CN 201120330485 U CN201120330485 U CN 201120330485U CN 202217555 U CN202217555 U CN 202217555U
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- Prior art keywords
- insulator
- transmission line
- side clearance
- clearance electrode
- ground connection
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- 239000012212 insulator Substances 0.000 title claims abstract description 50
- 230000005540 biological transmission Effects 0.000 title claims abstract description 38
- 230000001681 protective effect Effects 0.000 title abstract 4
- 239000002184 metal Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 229910052573 porcelain Inorganic materials 0.000 claims description 2
- 230000001052 transient effect Effects 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 3
- 208000025274 Lightning injury Diseases 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012211 strain insulator Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
A 500kV transmission line insulator with a protective gap comprises an insulator, a grounding side gap electrode, a high-voltage side gap electrode and an accessory, wherein the grounding side gap electrode and the high-voltage side gap electrode are respectively arranged at the grounding side and the high-voltage side of the insulator, the distance from the gap to the axis of the insulator is no less than 400mm, the distance of the gap is in the range of 65%-95% of the structure height of the insulator, and the high-voltage side gap electrode also serves as a grading ring of the insulator. Paralleled gap is a channelized protection method different from a traditional lightning prevention measure, avoids the failure damage of the insulator, improves the success rate of reclosing, and avoids the occurrence of permanent fault. The 500kV transmission line insulator with the protective gap can protect the insulator from being damaged and ensures the reclosing to be successful, so that a lightning flashover becomes a transient fault, and normal power supply of a power grid is guaranteed; an original grading ring is replaced by the high-voltage side gap, so that the potential distribution of the insulator is more uniform; and the 500kV transmission line insulator with the protective gap is lighter and is easy to install.
Description
Technical field:
The utility model relates to a kind of 500kV electric transmission line isolator with the protection gap, is used to solve that the 500kV ultra-high-tension power transmission line takes place frequently, the impaired accident of insulator that produces because of lightning discharge.
Background technology:
The lightning discharge of transmission line is one of problem that influences the line security operation always.China's electrical network is being carried out extensive work aspect the transmission line lightning protection transformation in recent years, and lightning outage rate is totally on a declining curve; But transmission line caused by lightning strike still can not be avoided fully, and the circuit thunderbolt causes the damaged phenomenon idol of insulator string that generation is arranged.
The lightning protection measures of extensively taking in the net at present comprises reduction earth resistance, reinforced insulation, installs tower head lightning rod and ground wire lightning protection side pin additional, leakage conductor or the like is installed; Its purpose all is in order to increase shield effectiveness, raising line lightning resisting level, the reduction tripping rate with lightning strike to lead, from belonging to the lightning protection measures of " obstruction type " inwardly.But because the randomness and the complexity of lightening activity, and the diversity and the otherness of transmission line corridor landform meteorological condition, make above-mentioned measure exist various problems when using at the scene, be difficult to form effective measures.
Summary of the invention:
The utility model is exactly the deficiency that the technical problem that will solve overcomes above-mentioned technology exactly, and a kind of 500kV electric transmission line isolator with the protection gap is provided, and the protection insulator is avoided the scaling loss of lightning discharge, improves the safety operation level of circuit.
The utility model designs to the lightning discharge accident that transmission line takes place frequently.Form the lightning discharge passage between ground connection side clearance electrode and the high-pressure side clearance electrode, make thunderbolt along the gap flashover, protection insulator and transmission line are not damaged, reclosing can be successful, thereby make lightning stroke flashover become transient fault, guarantees the electrical network normal power supply.
According to the utility model provide a kind of with the protection gap the 500kV electric transmission line isolator; Comprise insulator, ground connection side clearance electrode, high-pressure side clearance electrode and annex; It is characterized in that: said ground connection side clearance electrode and said high-pressure side clearance electrode are installed in the ground connection side and the high-pressure side of said insulator respectively; And the distance between said ground connection side clearance electrode and the said high-pressure side clearance electrode is not more than 95% of said insulator structure height, is not less than 65% of said insulator structure height simultaneously.
Said insulator is a 500kV porcelain insulating substring, or 500kV glass insulation substring, or the 500kV synthetic insulator.
Said ground connection side clearance electrode is the single piece of metal pipe, or the single piece of metal rod, and its external diameter is greater than 25mm, and its end is the smooth surface that radius of curvature is not less than 25mm.
At least 1 at said ground connection side clearance electrode, no more than 4.
Said high-pressure side clearance electrode is the metal tube or the metal bar of circulus, and the external diameter of metal tube or metal bar is not less than 45mm, and the radius of curvature of its circulus is not less than 200mm.
Said ground connection side clearance electrode is not less than 400mm towards the top of high-pressure side clearance electrode direction and the distance between the insulator axis, and said high-pressure side clearance electrode is not less than 400mm towards the top of ground connection side clearance electrode direction and the distance between the insulator axis.
Said ground connection side clearance electrode is fixed on the ground connection side metal-ware or iron tower of said insulator.
Said high-pressure side clearance electrode is fixed on the high-pressure side metal-ware or circuit of said insulator.
Said circulus is an ellipticity, and as the high-pressure side grading ring of said insulator, the single-ended or two ends of said circulus upwarp towards the bending of ground connection side clearance electrode direction simultaneously.
A kind of indicator type lightning protection device that falls that provides according to the utility model has the following advantages:
1, form the lightning discharge passage between gap high-field electrode and the gap ground electrode, make thunderbolt along the gap flashover, protection insulator and transmission line are not damaged, reclosing can be successful, thereby make lightning stroke flashover become transient fault, guarantees the electrical network normal power supply.
2, reasonable parameter design takes place between the gap when guaranteeing lightning discharge, the security of operation of protection insulator.
3, replace former grading ring with the gap, high-pressure side, the Potential distribution of insulator is more even.
4, maximum simplification has been done in the design of clearance electrode, and is light and handy, convenient.
Description of drawings:
Fig. 1 is the sketch map of a kind of embodiment of a kind of 500kV electric transmission line isolator with the protection gap of the utility model.
Fig. 2 is the sketch map of another kind of embodiment of a kind of 500kV electric transmission line isolator with the protection gap of the utility model.
Fig. 3 is the sketch map of another kind of embodiment of a kind of 500kV electric transmission line isolator with the protection gap of the utility model.
Fig. 4 is the sketch map of ground connection side clearance electrode of a kind of 500kV electric transmission line isolator with the protection gap of the utility model.
Fig. 5 is the sketch map of high-pressure side clearance electrode of a kind of 500kV electric transmission line isolator with the protection gap of the utility model.
Fig. 6 is the sketch map of another kind of high-pressure side clearance electrode of a kind of 500kV electric transmission line isolator with the protection gap of the utility model.
Fig. 7 is the sketch map of another kind of high-pressure side clearance electrode of a kind of 500kV electric transmission line isolator with the protection gap of the utility model.
Embodiment:
A kind of embodiment of the utility model such as accompanying drawing 1; A kind of 500kV electric transmission line isolator with the protection gap that the utility model provides comprises insulator 1, ground connection side clearance electrode 2, high-pressure side clearance electrode 3, air gap 4, ground connection side enclosure group 5 and high-pressure side enclosure group 6; Wherein the air gap between ground connection side clearance electrode 2 and the high-pressure side clearance electrode 34 constitutes the lightning discharge passage.Ground connection side clearance electrode 2 can be fixed on ground connection side enclosure group 5 or the iron tower, and high-pressure side clearance electrode 3 can be fixed on high-pressure side enclosure group 6 or the lead.
This accompanying drawing is the sketch map in one-sided installation protection gap, and insulator 1 is single insulator string.Its high-pressure side clearance electrode such as accompanying drawing 5.
Another kind of embodiment of the utility model such as accompanying drawing 2, insulator both sides are all installed the sketch map in protection gap, its high voltage side electrode such as accompanying drawing 6, and insulator 1 is two insulator strings, other explanations are identical with accompanying drawing 1.
Another kind of embodiment of the utility model such as accompanying drawing 3; A kind of 500kV electric transmission line isolator with the protection gap that the utility model provides comprises insulator 1, ground connection side clearance electrode 2, high-pressure side clearance electrode 3, air gap 4, ground connection side enclosure group 5 and high-pressure side enclosure group 6; Wherein the air gap between ground connection side clearance electrode 2 and the high-pressure side clearance electrode 34 constitutes the lightning discharge passage.Insulator 1 is the strain insulator of the two strings of parallel connection.Ground connection side clearance electrode 2 can be fixed on ground connection side enclosure group 5 or the iron tower, and high-pressure side clearance electrode 3 can be fixed on high-pressure side enclosure group 6 or the lead.Its high voltage side electrode such as accompanying drawing 7.
Accompanying drawing 4 is sketch mapes of ground connection side clearance electrode of a kind of 500kV electric transmission line isolator with the protection gap of the utility model, is its front view and end view among the figure, is made up of the single piece of metal pipe, and its end is a smooth surface.Use is at accompanying drawing 1,2, the ground connection side of insulator in 3.
Accompanying drawing 5 is sketch mapes of high-pressure side clearance electrode of a kind of 500kV electric transmission line isolator with the protection gap of the utility model, and diagram is its front view and vertical view, oval circulus, one-sided perk.Be used in the high-pressure side of accompanying drawing 1.
Fig. 6 is the sketch map of another kind of high-pressure side clearance electrode of a kind of 500kV electric transmission line isolator with the protection gap of the utility model, and diagram is its front view and vertical view, oval circulus, both sides perk.
Fig. 7 is the sketch map of another kind of high-pressure side clearance electrode of a kind of 500kV electric transmission line isolator with the protection gap of the utility model, and diagram is its front view and vertical view, generally uses on strain insulator string.
Above-mentioned preferred embodiment only supplies to explain the usefulness of the utility model, and is not the restriction to the utility model.Those of ordinary skill in the art under in spirit that does not break away from the utility model and scope, guiding, can also make various distortion and conversion, so all equivalent technical solutions all belongs to the protection range of the utility model.
Claims (9)
- One kind with the protection gap the 500kV electric transmission line isolator; Comprise insulator, ground connection side clearance electrode, high-pressure side clearance electrode and annex; It is characterized in that: said ground connection side clearance electrode and said high-pressure side clearance electrode are installed in the ground connection side and the high-pressure side of said insulator respectively; And the distance between said ground connection side clearance electrode and the said high-pressure side clearance electrode is not more than 95% of said insulator structure height, is not less than 65% of said insulator structure height simultaneously.
- 2. a kind of 500kV electric transmission line isolator with the protection gap as claimed in claim 1, it is characterized in that: said insulator is a 500kV porcelain insulating substring, or 500kV glass insulation substring, or the 500kV synthetic insulator.
- 3. a kind of 500kV electric transmission line isolator as claimed in claim 1 with the protection gap; It is characterized in that: said ground connection side clearance electrode is the single piece of metal pipe; Or the single piece of metal rod, its external diameter is greater than 25mm, and its end is the smooth surface that radius of curvature is not less than 25mm.
- 4. a kind of 500kV electric transmission line isolator with the protection gap as claimed in claim 1 is characterized in that: 1 at said ground connection side clearance electrode, no more than 4 at least.
- 5. a kind of 500kV electric transmission line isolator as claimed in claim 1 with the protection gap; It is characterized in that: said high-pressure side clearance electrode is the metal tube or the metal bar of circulus; The external diameter of metal tube or metal bar is not less than 45mm, and the radius of curvature of its circulus is not less than 200mm.
- 6. a kind of 500kV electric transmission line isolator as claimed in claim 1 with the protection gap; It is characterized in that: said ground connection side clearance electrode is not less than 400mm towards the top of high-pressure side clearance electrode direction and the distance between the insulator axis, and said high-pressure side clearance electrode is not less than 400mm towards the top of ground connection side clearance electrode direction and the distance between the insulator axis.
- 7. a kind of 500kV electric transmission line isolator with the protection gap as claimed in claim 1, it is characterized in that: said ground connection side clearance electrode is fixed on the ground connection side metal-ware or iron tower of said insulator.
- 8. a kind of 500kV electric transmission line isolator with the protection gap as claimed in claim 1, it is characterized in that: said high-pressure side clearance electrode is fixed on the high-pressure side metal-ware or circuit of said insulator.
- 9. a kind of 500kV electric transmission line isolator as claimed in claim 5 with the protection gap; It is characterized in that: said circulus is an ellipticity; As the high-pressure side grading ring of said insulator, the single-ended or two ends of said circulus upwarp towards the bending of ground connection side clearance electrode direction simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203304852U CN202217555U (en) | 2011-09-06 | 2011-09-06 | 500kV transmission line insulator with protective gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203304852U CN202217555U (en) | 2011-09-06 | 2011-09-06 | 500kV transmission line insulator with protective gap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202217555U true CN202217555U (en) | 2012-05-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203304852U Expired - Lifetime CN202217555U (en) | 2011-09-06 | 2011-09-06 | 500kV transmission line insulator with protective gap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202217555U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114823011A (en) * | 2021-09-28 | 2022-07-29 | 中国电力科学研究院有限公司 | A zero-value insulator anti-lightning and anti-pollution flashover device |
-
2011
- 2011-09-06 CN CN2011203304852U patent/CN202217555U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114823011A (en) * | 2021-09-28 | 2022-07-29 | 中国电力科学研究院有限公司 | A zero-value insulator anti-lightning and anti-pollution flashover device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120509 |