CN101694807B - High voltage outgoing line device of extra-high voltage transformer - Google Patents
High voltage outgoing line device of extra-high voltage transformer Download PDFInfo
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- CN101694807B CN101694807B CN2009100236776A CN200910023677A CN101694807B CN 101694807 B CN101694807 B CN 101694807B CN 2009100236776 A CN2009100236776 A CN 2009100236776A CN 200910023677 A CN200910023677 A CN 200910023677A CN 101694807 B CN101694807 B CN 101694807B
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- high voltage
- equalizing ball
- balance pipe
- voltage
- insulation
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Abstract
The invention discloses a high voltage outgoing line device of an extra-high voltage transformer, which comprises a high voltage outgoing line, wherein the high voltage outgoing line which is led out from a high voltage winding firstly penetrates from the horizontal end portion of an upwards bent equalizing pipe and then is bent to the vertical end portion of the equalizing pipe, finally the high voltage outgoing line is partially led out from high voltage branch pipe oil after passing through an equalizing ball connected with the vertical end portion of the equalizing pipe, and the high voltage outgoing line is provided with an electric potential connecting line in the equalizing ball for being connected with the equalizing ball. The high voltage outgoing line device of the extra-high voltage transformer is characterized in that the connection between the vertical end portion of the equalizing pipe and the equalizing ball is realized through a metal screw bolt with self-locking function, the connection between the electrical potential connecting line and the equalizing ball is also realized through a metal screw bolt with self-locking function, multiple layers of insulation screen separating oil clearances are arranged on the equalizing pipe and the equalizing ball, and an insulation support is positioned in each oil clearance.
Description
Technical field
The present invention relates to the high-voltage terminal device of a kind of ultra high voltage (1000kV and more than) transformer.
Background technology
The high-voltage terminal device of transformer is the insulation system of part in tietransformer high pressure winding high-pressure side lead-out wire and the bushing oil, its effect is to guarantee that the lead-out wire of high voltage, high insulation level has good electrical insulation properties in the overall structure that parts such as sleeve pipe, winding, fuel tank, core clamping are formed, and is the important component part of EHV transformer, extra-high voltage transformer Main Insulation Structure of Electric.
In traditional transformer high-voltage outgoing line device, balance pipe and voltage equalizing ball are integrally welded, high pressure winding lead-out wire also welds with current potential line between the voltage equalizing ball and connects, operative weldability is poor, poor reliability, the welding slag that welding produces is difficult to clean out, thereby causes internal contamination, makes high-voltage terminal device have the danger of partial discharge.In addition, the oil clearance number separated of balance pipe and voltage equalizing ball external insulation barrier and the oil clearance size insulating requirements that can not satisfy 1000kV and above extra-high voltage transformer.
Summary of the invention
The objective of the invention is to overcome the existing above-mentioned defective of traditional transformer high-voltage terminal device, the transformer high-voltage outgoing line device that a kind of rational in infrastructure, electrode attachment security is reliable, the insulation barrier structure can satisfy 1000kV and above extra-high voltage transformer insulating requirements is provided.
For reaching above purpose, the present invention takes following technical scheme to be achieved:
A kind of high-voltage terminal device of extra-high voltage transformer, comprise the high pressure lead-out wire, this high pressure lead-out wire is drawn by high pressure winding middle part, penetrate from a balance pipe horizontal end that is bent upwards, be bent to the vertical end of balance pipe, again by one with voltage equalizing ball that the vertical end of balance pipe is connected after from bushing oil part draw, the high pressure lead-out wire is provided with the current potential line and connects with voltage equalizing ball in voltage equalizing ball, it is characterized in that the vertical end of described balance pipe is realized with adopting the metal bolts of band auto-lock function being connected of voltage equalizing ball; Described current potential line is realized with the metal bolts that also adopts the band auto-lock function connecting of voltage equalizing ball; Described balance pipe and voltage equalizing ball are equipped with the multilayer insulation barrier outward and cut apart oil clearance, all have insulation to support in the per pass oil clearance.
In the such scheme, described balance pipe is provided with four layers of tubular insulation barrier outward and radially is divided into four road ring-type oil clearances with around the balance pipe, and per pass ring-type oil clearance width from inside to outside increases gradually; Described voltage equalizing ball is provided with first to fourth layer of spherical insulation barrier outward successively and radially is divided into four channel variable-section ring-type oil clearances with around the voltage equalizing ball, and per pass variable cross-section ring-type oil clearance width from inside to outside increases gradually; Between the spherical insulation barrier of first, second layer at the higher position of field intensity, voltage equalizing ball upper end, add one deck hemisphere insulation barrier and further cut apart variable cross-section ring-type oil clearance between the spherical insulation barrier of first, second layer.
Described balance pipe horizontal end and vertical end are provided with one or multi-channel support component.Support component comprises the insulation clamp of clamping balance pipe and insulation barrier thereof, and this insulation clamp is carried out clamping, support fixation by being connected with support to balance pipe level or vertical direction.
Advantage of the present invention is:
1, adopt the metal bolts of band auto-lock function to connect between balance pipe and the voltage equalizing ball, can exempt the pollution of welding high-voltage terminal device, safe and reliable, easy disassembly simultaneously.
2, balance pipe and voltage equalizing ball outside is provided with 4 layers of insulating paper cylinders separation oil clearance respectively, and per pass oil clearance width from inside to outside increases in proportion gradually, makes each layer oil clearance field strength distribution reasonable, and the rich degree of enough safety is arranged; Simultaneously increase to 5 layers of insulating cylinder, can obviously reduce this place's electric field strength in part, voltage equalizing ball upper end.
3, outgoing line device of the present invention adopts clamp to fix, and has overcome that the volume that in the past adopts due to the wave disc fixed form is big, the shortcoming of Heavy Weight, and outgoing line device weight is alleviated greatly, install support flexibly, convenient.
Description of drawings
Fig. 1 is high-voltage terminal device of the present invention (middle part direct-type outlet) overall structure figure.
Fig. 2 is an I portion zoomed-in view among Fig. 1.
Fig. 3 is an A-A cutaway view among Fig. 1.
Fig. 4 is a B-B cutaway view among Fig. 1.
Fig. 5 is the structure chart of balance pipe support component among Fig. 1.
Among Fig. 1-Fig. 5: 1, balance pipe; 2, voltage equalizing ball; 3, high pressure lead-out wire; 4, the current potential line between high pressure lead-out wire and voltage equalizing ball; 5, high pressure winding; 6, part in the bushing oil; 7, oil tank of transformer; 8, insulation clamp; 9, the balance pipe insulation covers; 10, the outer multilayer insulation paper web of balance pipe; 11, the insulation between the balance pipe paper web is supported; 12, the voltage equalizing ball insulation covers; 13, the outer multilayer insulation paper web of voltage equalizing ball; 14, the insulation between the voltage equalizing ball paper web is supported; 15, support; 16, the metal bolts of band auto-lock function.
Embodiment
The present invention is described in further detail below in conjunction with drawings and the specific embodiments.
Shown in Figure 2 as Fig. 1, high-voltage terminal device of the present invention passes through band certainly by balance pipe 1 and voltage equalizing ball 2
The metal bolts 16 of lock function reliably connects to form one as electrode, the material of balance pipe 1 and voltage equalizing ball 2 can be selected copper material or aluminium for use, penetrate one 90 after high pressure lead-out wire 3 is drawn by high pressure winding 5 and spend in the balance pipe 1 that is bent upwards, in voltage equalizing ball 2,, make that part 6 becomes equipotential in high pressure lead-out wire 3 and voltage equalizing ball 2 and the bushing oil with the current potential line 4 and voltage equalizing ball 2 positive connection of high pressure lead-out wire.High pressure lead-out wire 3 part 6 in bushing oil is drawn.Balance pipe 1 of the present invention connects with voltage equalizing ball 2, and the current potential line 4 of high pressure lead-out wire does not all adopt welding with connecting of voltage equalizing ball 2, use the metal bolts 16 of band auto-lock function to connect, its outstanding technique effect is to avoid welding causing welding slag to pollute to the inside of high-voltage terminal device, the danger of elimination partial discharge, safe and reliable, easy disassembly simultaneously.
Shown in Figure 4 as Fig. 3, balance pipe 1 surface is provided with insulation and covers 9, and voltage equalizing ball 2 surfaces are provided with insulation and cover 12, and insulation covers and is insulation paper pulp, has also adopted multilayered barrier outside simultaneously, carries out oil clearance and cuts apart.4 layers of insulating paper cylinder 10-1～10-4 of balance pipe 1 external application are cut apart oil clearance, and the per pass oil clearance all has insulation to support 11-1～11-4.Per pass oil clearance width from inside to outside increases gradually in following ratio, and the first road oil clearance of establishing between insulating paper cylinder 10-1, the 10-2 is h
1Millimeter, then second road to the, four road oil clearances are respectively k
1h
1, k
2h
1And k
3h
1, k wherein
1Value be about 1.5～2.5, k
2Value be about 2～4, k
3Value be about 3～6.This design can guarantee that outer each layer oil clearance field strength distribution of balance pipe is reasonable, and field intensity changes the rich degree height of safety; 4 layers of whole ball insulating paper cylinder 13-1～13-4 of voltage equalizing ball 2 peripheral hardwares are cut apart oil clearance, and the per pass oil clearance all has insulation to support 14-1～14-4.Per pass oil clearance width from inside to outside increases gradually in following ratio, and the first road oil clearance of establishing between insulating paper cylinder 13-1, the 13-2 is h
2Millimeter, then second road to the, four road oil clearances are respectively k
1h
2, k
2h
2And k
3h
2, k wherein
1Value be about 1.5～2.5, k
2Value be about 2～4, k
3Value be about 3～6.This design can guarantee that outer each layer oil clearance field strength distribution of voltage equalizing ball is reasonable, and field intensity changes the rich degree height of safety.In addition add 1 layer of hemisphere insulating paper cylinder 13-5 in the higher position of voltage equalizing ball 2 upper end field intensity (part 6 lower ends in the bushing oil) and further cut apart oil clearance (see figure 2) between insulating paper cylinder 13-1, the 13-2, the part adds hemisphere insulating paper cylinder 13-5 can significantly improve field intensity allowable.
As shown in Figure 5, the present invention can adopt the support component of being made up of insulation clamp 8 and support 15 that balance pipe 1 horizontal direction is carried out clamping and support fixation; Different according to high-voltage terminal device practical structures size and weight, also can reach vertical direction in the horizontal direction adopts one or multi-channel such support component to install and fix, adopt the support component of insulation clipping type, its advantage is flexible for installation, convenient, reduces the volume and weight of outgoing line device.
Claims (4)
1. the high-voltage terminal device of an extra-high voltage transformer, comprise the high pressure lead-out wire, this high pressure lead-out wire is drawn by high pressure winding middle part, penetrate from a balance pipe horizontal end that is bent upwards, be bent to the vertical end of balance pipe, again by one with voltage equalizing ball that the vertical end of balance pipe is connected after from bushing oil part draw, the high pressure lead-out wire is provided with the current potential line and connects with voltage equalizing ball in voltage equalizing ball, it is characterized in that the vertical end of described balance pipe is realized with adopting the metal bolts of band auto-lock function being connected of voltage equalizing ball; Described current potential line is realized with the metal bolts that also adopts the band auto-lock function connecting of voltage equalizing ball; Described balance pipe and voltage equalizing ball are equipped with the multilayer insulation barrier outward and cut apart oil clearance, all have insulation to support in the per pass oil clearance.
2. the high-voltage terminal device of extra-high voltage transformer as claimed in claim 1, it is characterized in that, described balance pipe is provided with four layers of tubular insulation barrier outward and radially is divided into four road ring-type oil clearances with around the balance pipe, and per pass ring-type oil clearance width from inside to outside increases gradually; Described voltage equalizing ball is provided with first to fourth layer of spherical insulation barrier outward from the inside to the outside successively and radially is divided into four channel variable-section ring-type oil clearances with around the voltage equalizing ball, and per pass variable cross-section ring-type oil clearance width from inside to outside increases gradually; Between the spherical insulation barrier of first, second layer at the higher position of field intensity, voltage equalizing ball upper end, add one deck hemisphere insulation barrier and further cut apart variable cross-section ring-type oil clearance between the spherical insulation barrier of first, second layer.
3. the high-voltage terminal device of extra-high voltage transformer as claimed in claim 1 is characterized in that, described balance pipe horizontal end and vertical end are provided with one or multi-channel support component.
4. the high-voltage terminal device of extra-high voltage transformer as claimed in claim 3, it is characterized in that, described support component comprises the insulation clamp of clamping balance pipe and insulation barrier thereof, and this insulation clamp is carried out clamping, support fixation by being connected with support to balance pipe level or vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100236776A CN101694807B (en) | 2009-08-27 | 2009-08-27 | High voltage outgoing line device of extra-high voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100236776A CN101694807B (en) | 2009-08-27 | 2009-08-27 | High voltage outgoing line device of extra-high voltage transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101694807A CN101694807A (en) | 2010-04-14 |
| CN101694807B true CN101694807B (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100236776A Active CN101694807B (en) | 2009-08-27 | 2009-08-27 | High voltage outgoing line device of extra-high voltage transformer |
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| CN (1) | CN101694807B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021254639A1 (en) * | 2020-06-19 | 2021-12-23 | Hitachi Energy Switzerland Ag | Bushing connection shielding system and use of the same in an exit insulating system of a high voltage transformer |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2442321B1 (en) * | 2010-10-15 | 2012-12-05 | ABB Technology AG | Feedthrough for high voltage discharge lines in oil transformers |
| EP2445071B1 (en) * | 2010-10-15 | 2014-01-01 | ABB Technology AG | Holder for high voltage tubular leadthroughs in oil transformers |
| CN103057836B (en) * | 2011-10-21 | 2016-04-20 | 特变电工衡阳变压器有限公司 | A kind of transport fixed support of voltage transformer outgoing line device |
| CN102543390B (en) * | 2012-02-27 | 2014-06-04 | 中国西电电气股份有限公司 | AC (Alternating Current) 750kV end part outgoing line structure of ultrahigh-voltage converter transformer |
| CN102930961A (en) * | 2012-11-15 | 2013-02-13 | 常州市英中电气有限公司 | Grid side wire outlet device of super-high voltage converter transformer |
| CN103227039B (en) * | 2013-05-16 | 2016-05-04 | 山东电力设备有限公司 | A kind of extra-high voltage transformer outgoing line device |
| CN104091682B (en) * | 2014-07-29 | 2016-03-09 | 哈尔滨理工大学 | Based on the converter transformer outgoing line device of nano modification non-linear dielectric cardboard |
| EP3319097A4 (en) * | 2015-07-01 | 2018-07-25 | Shandong Electrical Engineering & Equipment Group Co. Ltd. | High voltage outlet structure of ultra-high voltage shunt reactor |
| CN105609265B (en) * | 2016-03-01 | 2017-11-14 | 泰州新源电工器材有限公司 | A kind of AC transformer outgoing line device |
| CN106568564A (en) * | 2016-10-26 | 2017-04-19 | 中国电力科学研究院 | Vibration test clamp for voltage transformer outgoing line device |
| CN106384653A (en) * | 2016-11-02 | 2017-02-08 | 中国电力科学研究院 | Direct-out type wire outgoing device |
| CN106653320A (en) * | 2016-11-18 | 2017-05-10 | 中国电力科学研究院 | Clamping device of extra-high voltage transformer 500 KV coil-out device and extra-high voltage transformer |
| CN107424796B (en) * | 2017-08-16 | 2023-06-23 | 扬州市美华电气有限公司 | Pressure equalizing ball |
| CN111145992B (en) * | 2020-01-02 | 2020-09-29 | 广东汇杰电力技术有限公司 | Power transformer outgoing line lead insulation assembly |
-
2009
- 2009-08-27 CN CN2009100236776A patent/CN101694807B/en active Active
Non-Patent Citations (4)
| Title |
|---|
| JP昭58-222510A 1983.12.24 |
| JP昭59-204217A 1984.11.19 |
| JP昭60-193313A 1985.10.01 |
| JP昭62-155506A 1987.07.10 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021254639A1 (en) * | 2020-06-19 | 2021-12-23 | Hitachi Energy Switzerland Ag | Bushing connection shielding system and use of the same in an exit insulating system of a high voltage transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101694807A (en) | 2010-04-14 |
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| CB03 | Change of inventor or designer information |
Inventor after: Xie Qingfeng Inventor after: Li Jinzhong Inventor after: Han Xiancai Inventor after: Han Xiaodong Inventor after: Wang Xiaoning Inventor after: Meng Likun Inventor before: Xie Qingfeng Inventor before: Han Xiaodong Inventor before: Meng Likun |
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Effective date of registration: 20170508 Address after: 710075 Shaanxi city of Xi'an Province Tang Hing Road No. 7 Co-patentee after: China Electric Power Research Institute Patentee after: China XD Electronic Corporation Address before: 710075 Shaanxi city of Xi'an Province Tang Hing Road No. 7 Patentee before: China XD Electronic Corporation |