CN104376933A - 800 kV direct-current insulator with optimized umbrella-shaped structure - Google Patents
800 kV direct-current insulator with optimized umbrella-shaped structure Download PDFInfo
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- CN104376933A CN104376933A CN201410630261.1A CN201410630261A CN104376933A CN 104376933 A CN104376933 A CN 104376933A CN 201410630261 A CN201410630261 A CN 201410630261A CN 104376933 A CN104376933 A CN 104376933A
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- grading ring
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Abstract
The invention discloses an 800 kV direct-current insulator with an optimized umbrella-shaped structure. The 800 kV direct-current insulator with the optimized umbrella-shaped structure comprises an insulator string unit, the insulator string unit comprises an insulation ball head fitting, an insulator string, an insulation ball socket fitting, a large grading ring and a small grading ring. The small grading ring and the insulation ball head fitting are located on one side of the insulator string, the large grading ring and the insulating ball socket fitting are located on the other side of the insulator string, and the insulator string is of the large-small-medium-small optimized umbrella-shaped structure composed of a large umbrella, a first small umbrella, a medium umbrella and a second small umbrella. The two grading rings are each provided with a ring body, a grading ring supporting frame and a fixing locking bolt and are each in an open shape. The opening parts of the grading rings are discharging gaps, can effectively protect the ends of the insulator from being eroded by an electric field, guarantee that the situation that the two grading rings deform and displace due to collision in vibration caused by wind cannot occur, and guarantee safe and reliable operation of the insulator in a +/-800 kV direct-current transmission line. The 800 kV direct-current insulator with the optimized umbrella-shaped structure can well meet the requirement for the operation environment of the +/-800 kV direct-current line, can be protected from being eroded by the electric field, saves line maintenance cost, and guarantes long-term and reliable operation of the line.
Description
Technical field:
The present invention relates to the composite insulator string in a kind of extra-high voltage electric transmission and transformation system, particularly relate to a kind of 800kV DC Insulator with optimization beveled structure, belong to extreme high voltage technical field.
Background technology:
Composite insulator is a very important equipment in transmission line, and all presses shielding problem to be affect a transmission line security of operation whether key factor.Problems of The Electric Field mainly its Analysis of End Electric Field of composite insulator, electric field strength on gold utensil is larger, in air oxygen detrition situation, corona phenomenon may be there is in gold utensil, therefore, need the electric field strength managing to reduce hardware end, corresponding uniform ring is installed, and then the electric field strength of hardware end is reduced.
± 800kV DC Insulator is applied in the project of Indian country grid company super high voltage direct current electricity transmission line, and its on-the-spot running environment is as follows: maximum environmental temperature: 48 degrees Celsius; Minimum ambient temperature: 0 degree; Relative humidity: 10 ~ 100%; Wind district: 4; Maximum wind velocity: 47 meter per seconds; Maximum height above sea level: 1000 meters; Gradation for surface pollution: Chong Wu district; Single string structure height: 4560MM; Singly go here and there creepage distance: 16800MM.This on-the-spot running environment need insulator have stronger filthy self-cleaning ability, can in the safe operation of Chong Wu district, the inclined ability of stronger wind resistance can be had.
Traditional grading ring and composite insulator obviously can not meet the needs of UHV transmission line, particularly can not meet ± on-the-spot running environment the requirement of 800kV direct-current ultra high voltage power grids circuits.
Summary of the invention:
Technical problem to be solved by this invention is: provide a kind of and have the 800kV DC Insulator optimizing beveled structure; large and small grading ring with the use of; can not corrode by electric field by available protecting insulator end; and the assemblage gap of two pendulous string isolator can be met; ensure the phenomenon that two grading rings can not cause because of collision being out of shape, being shifted in the vibration of wind dance, thus ensure the safe and reliable operation of insulator and ± 800kV DC power transmission line.
The technical scheme that the present invention takes for technical solution problem is:
A kind of have the 800kV DC Insulator optimizing beveled structure, comprise stringinsulator unit, described stringinsulator unit comprises insulation bulb gold utensil, little grading ring, insulator string, large grading ring and insulation ball-and-socket gold utensil, and described little grading ring and insulation bulb gold utensil are positioned at the opposite side that the side of insulator string, described large grading ring and insulation ball-and-socket gold utensil are positioned at insulator string, the medium and small optimization beveled structure of the size that described insulator string is made up of gamp, the first umbellule, middle umbrella and the second umbellule, described large grading ring comprises large grading ring ring body, large grading ring bracing frame and large grading ring fixing and locking bolt, described large grading ring ring body is provided with large ring body opening, the ring body end face of described large ring body opening both sides is spherical shape, gap between two ring body end faces is less than or equal to the diameter of 1/8 large ring body, described large grading ring bracing frame is outward extending insulated connecting piece, in different " S " type, described large grading ring fixing and locking bolt and large grading ring bracing frame are positioned at large grading ring ring body side, be fixedly connected with by rivet between described large grading ring bracing frame one end with large grading ring ring body, the other end is bolted on the insulation ball-and-socket gold utensil of composite insulator string side by large grading ring fixing and locking, described little grading ring comprises little grading ring ring body, little grading ring bracing frame and little grading ring fixing and locking bolt, described little grading ring ring body is provided with little ring body opening, the ring body end face of described little ring body opening both sides is spherical shape, gap between two ring body end faces is less than or equal to the diameter of 1/8 little ring body, described little grading ring bracing frame is outward extending insulated connecting piece, in " L " type, described little grading ring fixing and locking bolt and little grading ring bracing frame are positioned at little grading ring ring body side, described " L " type little grading ring bracing frame one end is fixedly connected with between little grading ring ring body, the other end is bolted on the insulation bulb gold utensil of composite insulator string opposite side by little grading ring fixing and locking, described stringinsulator unit is multiple, and multiple stringinsulator unit combines the 800kV DC Insulator forming and have and optimize beveled structure mutually, and the insulation bulb gold utensil of adjacent two stringinsulator units and insulation ball-and-socket gold utensil match each other and link together.
Described DC Insulator side is provided with arcing horn starting rod.
The ring part of described large grading ring and little grading ring selects YL113 aluminum alloy materials to process, and surface finish, prevents point discharge; Described large grading ring bracing frame selects that integral cast steel is zinc-plated to be formed, for large grading ring provides enough strength support; Described little grading ring bracing frame selects high-strength aluminum alloy material to process, for little grading ring provides the support of sufficient intensity.
The medium and small optimization beveled structure of the size that insulator string of the present invention is made up of gamp, the first umbellule, middle umbrella and the second umbellule, can meet the Insulators Used requirement in heavy pollution district.Its advantage is: 1. this umbrella-shaped structure has stronger filthy self-cleaning ability, can in the safe operation of Chong Wu district; 2. because longitudinal section is less, this umbrella-shaped structure has the inclined ability of stronger wind resistance; 3. this umbrella-shaped structure has stronger resistance to mist sudden strain of a muscle and rain sudden strain of a muscle ability, and effectively can reduce the possibility of electric arc bridge network between umbrella; 4. this umbrella-shaped structure is by the three-dimensional simulation electric Field Calculation of Shenzhen Graduate School of Tsinghua University, and have passed complete set design and the type approval test of Chinese DianKeYuan, can meet ± on-the-spot running environment the requirement of 800kV direct-current ultra high voltage power grids circuits completely.
The present invention by by the large and small grading ring of two kinds of different types with the use of; electrical performance demands and the installation requirement of DC Insulator can be met completely; can not corrode by electric field by available protecting insulator end; and the assemblage gap of two pendulous string isolator can be met; ensure that two grading rings can not cause distortion, displacement because of collision in the vibration of wind dance, thus ensure the safe and reliable operation of insulator and ± 800kV DC power transmission line.
Large grading ring and little grading ring are all designed to opening shape in the present invention, and opening portion is discharging gap, when electric charge savings is too much, and can self-discharge release pressure.Meanwhile, the opening design of two size ring bodies, is conducive to the online installation and removal of grading ring, does not need to dismantle insulator, again lift the replacing that circuit just easily can realize grading ring.
The present invention is novel in design, structure is unique; well can either meet ± 800kV DC line operation demand, protection insulator end does not corrode by electric field; be convenient to again online replacing and installation; great saving line upkeep cost; and excellent material effectively can avoid corrosion; guarantee to run reliably and with long-term, there are very high market application foreground and economic results in society.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of stringinsulator unit in the present invention;
Fig. 3 is the size medium and small optimization beveled structure schematic diagram of insulator string in Fig. 2;
Fig. 4 is the structural representation of large grading ring in the present invention;
Fig. 5 is the left view of Fig. 4;
Fig. 6 is the structural representation of the medium and small grading ring of the present invention;
Fig. 7 is the right view of Fig. 6.
Embodiment:
Below in conjunction with accompanying drawing, the present invention is made further explanation and description:
See Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, a kind of have the 800kV DC Insulator optimizing beveled structure, comprise stringinsulator unit, described stringinsulator unit comprises insulation bulb gold utensil 8, little grading ring 20, insulator string 7, large grading ring 10 and insulation ball-and-socket gold utensil 9, and little grading ring 20 and insulation bulb gold utensil 8 are positioned at the opposite side that the side of insulator string 7, large grading ring 10 and insulation ball-and-socket gold utensil 9 are positioned at insulator string 7, the medium and small optimization beveled structure of size that insulator string 7 is made up of gamp 17, first umbellule 27, middle umbrella 37 and the second umbellule 47, described large grading ring 10 comprises large grading ring ring body 1, large grading ring bracing frame 2 and large grading ring fixing and locking bolt 3, large grading ring ring body 1 is provided with large ring body opening 4, the ring body end face of large ring body opening 4 both sides is spherical shape 5, gap between two ring body end faces is less than or equal to the diameter of 1/8 large ring body, large grading ring bracing frame 2 is outward extending insulated connecting piece, in different " S " type, large grading ring fixing and locking bolt 3 and large grading ring bracing frame 2 are positioned at large grading ring ring body 1 side, be fixedly connected with by rivet between large grading ring bracing frame 2 one end with large grading ring ring body 1, the other end is fixed on the insulation ball-and-socket gold utensil 9 of composite insulator string side by large grading ring fixing and locking bolt 3, described little grading ring 20 comprises little grading ring ring body 11, little grading ring bracing frame 21 and little grading ring fixing and locking bolt 31, little grading ring ring body 11 is provided with little ring body opening 41, the ring body end face of described little ring body opening 41 both sides is spherical shape 51, gap between two ring body end faces is less than or equal to the diameter of 1/8 little ring body, little grading ring bracing frame 21 is outward extending insulated connecting piece, in " L " type, little grading ring fixing and locking bolt 31 and little grading ring bracing frame 21 are positioned at little grading ring ring body 11 side, " L " type little grading ring bracing frame 21 one end is fixedly connected with between little grading ring ring body 11, the other end is fixed on the insulation bulb gold utensil 8 of composite insulator string opposite side by little grading ring fixing and locking bolt 31, stringinsulator unit is multiple, and multiple stringinsulator unit combines the 800kV DC Insulator forming and have and optimize beveled structure mutually, and the insulation bulb gold utensil 8 of adjacent two stringinsulator units and insulation ball-and-socket gold utensil 9 match each other and link together, DC Insulator side is provided with arcing horn starting rod 6.
Wherein: the ring part of large grading ring 10 and little grading ring 20 selects YL113 aluminum alloy materials to process, and surface finish, prevents point discharge; Large grading ring bracing frame 2 selects that integral cast steel is zinc-plated to be formed, for large grading ring 10 provides enough strength support; Little grading ring bracing frame 21 selects high-strength aluminum alloy material to process, for little grading ring 20 provides the support of sufficient intensity.
The medium and small optimization beveled structure of size that is made up of gamp 17, first umbellule 27, middle umbrella 37 and the second umbellule 47 of insulator string, can meet the Insulators Used requirement in heavy pollution district in the present invention.Its advantage is: 1. this umbrella-shaped structure has stronger filthy self-cleaning ability, can in the safe operation of Chong Wu district; 2. because longitudinal section is less, this umbrella-shaped structure has the inclined ability of stronger wind resistance; 3. this umbrella-shaped structure has stronger resistance to mist sudden strain of a muscle and rain sudden strain of a muscle ability, and effectively can reduce the possibility of electric arc bridge network between umbrella; 4. this umbrella-shaped structure is by the three-dimensional simulation electric Field Calculation of Shenzhen Graduate School of Tsinghua University, and have passed complete set design and the type approval test of Chinese DianKeYuan, can meet ± on-the-spot running environment the requirement of 800kV direct-current ultra high voltage power grids circuits completely.
Large grading ring 10 and little grading ring 20 are all designed to opening shape in the present invention, and opening portion is discharging gap, when electric charge savings is too much, and can self-discharge release pressure.Meanwhile, the opening design of two size ring bodies, is conducive to the online installation and removal of grading ring, does not need to dismantle insulator, again lift the replacing that circuit just easily can realize grading ring.The present invention is novel in design, structure is unique; well can either meet ± 800kV DC line operation demand, protection insulator end does not corrode by electric field; be convenient to again online replacing and installation; great saving line upkeep cost; and excellent material effectively can avoid corrosion; guarantee to run reliably and with long-term, there are very high market application foreground and economic results in society.
Claims (3)
1. one kind has the 800kV DC Insulator optimizing beveled structure, comprise stringinsulator unit, it is characterized in that: described stringinsulator unit comprises insulation bulb gold utensil (8), little grading ring (20), insulator string (7), large grading ring (10) and insulation ball-and-socket gold utensil (9), described little grading ring (20) and bulb gold utensil (8) that insulate are positioned at the opposite side that the side of insulator string (7), described large grading ring (10) and ball-and-socket gold utensil (9) that insulate are positioned at insulator string (7), the medium and small optimization beveled structure of size that described insulator string (7) is made up of gamp (17), the first umbellule (27), middle umbrella (37) and the second umbellule (47), described large grading ring (10) comprises large grading ring ring body (1), large grading ring bracing frame (2) and large grading ring fixing and locking bolt (3), described large grading ring ring body (1) is provided with large ring body opening (4), the ring body end face of described large ring body opening (4) both sides is spherical shape (5), gap between two ring body end faces is less than or equal to the diameter of 1/8 large ring body, described large grading ring bracing frame (2) is outward extending insulated connecting piece, in different " S " type, described large grading ring fixing and locking bolt (3) and large grading ring bracing frame (2) are positioned at large grading ring ring body (1) side, described large grading ring bracing frame (2) one end is fixedly connected with by rivet with between large grading ring ring body (1), the other end is fixed on the insulation ball-and-socket gold utensil (9) of composite insulator string side by large grading ring fixing and locking bolt (3), described little grading ring (20) comprises little grading ring ring body (11), little grading ring bracing frame (21) and little grading ring fixing and locking bolt (31), described little grading ring ring body (11) is provided with little ring body opening (41), the ring body end face of described little ring body opening (41) both sides is spherical shape (51), gap between two ring body end faces is less than or equal to the diameter of 1/8 little ring body, described little grading ring bracing frame (21) is outward extending insulated connecting piece, in " L " type, described little grading ring fixing and locking bolt (31) and little grading ring bracing frame (21) are positioned at little grading ring ring body (11) side, described " L " type little grading ring bracing frame (21) one end is fixedly connected with between little grading ring ring body (11), the other end is fixed on the insulation bulb gold utensil (8) of composite insulator string opposite side by little grading ring fixing and locking bolt (31), described stringinsulator unit is multiple, multiple stringinsulator unit combines the 800kV DC Insulator forming and have and optimize beveled structure mutually, and the insulation bulb gold utensil (8) of adjacent two stringinsulator units and insulation ball-and-socket gold utensil (9) match each other and link together.
2. according to claim 1 have the 800kV DC Insulator optimizing beveled structure, it is characterized in that: described DC Insulator side is provided with arcing horn starting rod (6).
3. according to claim 2 have the 800kV DC Insulator optimizing beveled structure, it is characterized in that: the ring part of described large grading ring (10) and little grading ring (20) selects YL113 aluminum alloy materials to process, surface finish, prevents point discharge; Described large grading ring bracing frame (2) selects that integral cast steel is zinc-plated to be formed, for large grading ring (10) provides enough strength support; Described little grading ring bracing frame (21) selects high-strength aluminum alloy material to process, for little grading ring (20) provides the support of sufficient intensity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410630261.1A CN104376933A (en) | 2014-11-11 | 2014-11-11 | 800 kV direct-current insulator with optimized umbrella-shaped structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410630261.1A CN104376933A (en) | 2014-11-11 | 2014-11-11 | 800 kV direct-current insulator with optimized umbrella-shaped structure |
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| CN104376933A true CN104376933A (en) | 2015-02-25 |
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| CN201410630261.1A Pending CN104376933A (en) | 2014-11-11 | 2014-11-11 | 800 kV direct-current insulator with optimized umbrella-shaped structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771395A (en) * | 2016-12-17 | 2017-05-31 | 三峡大学 | A kind of grading ring of the embedded coil of transmission line of electricity |
| CN109243729A (en) * | 2018-09-20 | 2019-01-18 | 南方电网科学研究院有限责任公司 | A kind of grading ring fitting |
| CN109360695A (en) * | 2018-10-30 | 2019-02-19 | 扬州旺源电气有限公司 | A kind of insulator aluminum grading ring |
| CN109387758A (en) * | 2018-12-26 | 2019-02-26 | 中节能启源雷宇（江苏）电气科技有限公司 | A kind of major loop in synthetic test loop is lighted a fire engaging means |
| CN110011288A (en) * | 2019-03-01 | 2019-07-12 | 深圳市楠木家家具有限公司 | A kind of electric power box insulator electric charge transfer corona-proofing device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07235231A (en) * | 1994-02-21 | 1995-09-05 | Ngk Insulators Ltd | Electric field moderating metal tool for insulator apparatus |
| CN2521720Y (en) * | 2001-04-11 | 2002-11-20 | 广州Mpc国际电工有限公司 | Organic composite insulator |
| CN201084501Y (en) * | 2007-10-08 | 2008-07-09 | 山东彼岸电力科技有限公司 | An insulator umbrella |
| CN103441462A (en) * | 2013-07-23 | 2013-12-11 | 国家电网公司 | Segmental combined type galloping-prevention composite phase-earth spacing rod |
| CN103531313A (en) * | 2013-06-20 | 2014-01-22 | 国家电网公司 | Composite insulator |
| CN103915227A (en) * | 2014-04-14 | 2014-07-09 | 国家电网公司 | +/-660 kV direct-current composite insulator |
| CN204288964U (en) * | 2014-11-11 | 2015-04-22 | 国家电网公司 | There is the 800kV DC Insulator optimizing beveled structure |
-
2014
- 2014-11-11 CN CN201410630261.1A patent/CN104376933A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07235231A (en) * | 1994-02-21 | 1995-09-05 | Ngk Insulators Ltd | Electric field moderating metal tool for insulator apparatus |
| CN2521720Y (en) * | 2001-04-11 | 2002-11-20 | 广州Mpc国际电工有限公司 | Organic composite insulator |
| CN201084501Y (en) * | 2007-10-08 | 2008-07-09 | 山东彼岸电力科技有限公司 | An insulator umbrella |
| CN103531313A (en) * | 2013-06-20 | 2014-01-22 | 国家电网公司 | Composite insulator |
| CN103441462A (en) * | 2013-07-23 | 2013-12-11 | 国家电网公司 | Segmental combined type galloping-prevention composite phase-earth spacing rod |
| CN103915227A (en) * | 2014-04-14 | 2014-07-09 | 国家电网公司 | +/-660 kV direct-current composite insulator |
| CN204288964U (en) * | 2014-11-11 | 2015-04-22 | 国家电网公司 | There is the 800kV DC Insulator optimizing beveled structure |
Non-Patent Citations (2)
| Title |
|---|
| 赵强: "《输电线路金具理论与应用》", 31 August 2013 * |
| 黎文安: "《电气设备手册 中册》", 31 July 2007 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771395A (en) * | 2016-12-17 | 2017-05-31 | 三峡大学 | A kind of grading ring of the embedded coil of transmission line of electricity |
| CN109243729A (en) * | 2018-09-20 | 2019-01-18 | 南方电网科学研究院有限责任公司 | A kind of grading ring fitting |
| CN109243729B (en) * | 2018-09-20 | 2023-12-22 | 南方电网科学研究院有限责任公司 | Equalizing ring hardware fitting |
| CN109360695A (en) * | 2018-10-30 | 2019-02-19 | 扬州旺源电气有限公司 | A kind of insulator aluminum grading ring |
| CN109387758A (en) * | 2018-12-26 | 2019-02-26 | 中节能启源雷宇（江苏）电气科技有限公司 | A kind of major loop in synthetic test loop is lighted a fire engaging means |
| CN109387758B (en) * | 2018-12-26 | 2024-03-19 | 中节能启源雷宇（江苏）电气科技有限公司 | Main loop ignition switching-on device in synthetic test loop |
| CN110011288A (en) * | 2019-03-01 | 2019-07-12 | 深圳市楠木家家具有限公司 | A kind of electric power box insulator electric charge transfer corona-proofing device |
| CN110011288B (en) * | 2019-03-01 | 2020-12-29 | 大唐三门峡电力有限责任公司 | Electric power box insulator charge transfer anticorona device |
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Application publication date: 20150225 |