CN201829325U - Iron core side-yoke combination shielding structure of ultra-high voltage transformer - Google Patents
Iron core side-yoke combination shielding structure of ultra-high voltage transformer Download PDFInfo
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- CN201829325U CN201829325U CN2010205786501U CN201020578650U CN201829325U CN 201829325 U CN201829325 U CN 201829325U CN 2010205786501 U CN2010205786501 U CN 2010205786501U CN 201020578650 U CN201020578650 U CN 201020578650U CN 201829325 U CN201829325 U CN 201829325U
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- side pole
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Abstract
The utility model belongs to the technical field of transformers, in particular relates to an iron core side-yoke combination shielding structure of an ultra-high voltage transformer, which is applicable to ultra-high voltage and high-capacity transformers with the voltage of an outer coil equal to or greater than 220 kilovolts. The iron core side-yoke combination shielding structure composed of a layer of grounded shields, two layers of stays and two layers of arc-shaped shielding paperboard is mounted on the surface of an iron core side-yoke adjacent to the outer coil, so as to improve the withstand voltage strength between the outer coil and the iron core side-yoke, decrease the insulating distance, and reduce partial discharge capacity and the material cost of the transformer.
Description
Technical field
The utility model belongs to the transformer technology field, is specifically related to a kind of EHV transformer iron core side pole combination shielding construction, is applicable to that the exterior loop electric pressure is at 220 kilovolts and above extra-high-voltage large-capacity transf.
Background technology
The compressive resistance of transformer is to determine one of basic index that can transformer move, the reliability of compressive resistance directly has influence on the transformer reliability of operation, under the prerequisite of the reliability that guarantees compressive resistance, the insulation distance that dwindles transformer has tangible economic implications.
For EHV transformer, when capacity during greater than 150MVA, for reducing three-phase five-limb or the single-phase three pillar type core construction that shipping height need adopt the band iron core side pole usually, when the exterior loop electric pressure is very high, for guaranteeing enough compressive resistances, distance between exterior loop and the iron core side pole is bigger, has influenced the material cost of EHV transformer.Simultaneously because the electric pressure of exterior loop is very high, formed the electric field of high field intensity, and iron core side pole is multistage notch cuttype, the iron core side pole stack corner angle of an adjacent side with coil cause field intensity to be concentrated, cause electric field distortion, easily cause in the oil or insulation in the generation of partial discharge, thereby cause decreasing insulating, under serious partial discharge long term, may cause puncture.
Summary of the invention
The technical problems to be solved in the utility model is: a kind of iron core side pole combination shielding construction is provided, can improve the compressive resistance between transformer exterior loop and the iron core side pole, dwindle the insulation distance of exterior loop to iron core side pole, the corner angle of shielding iron core side pole stack reduce partial discharge quantity.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of EHV transformer iron core side pole combination shielding construction, comprise and be close to the earth shield that other post is installed, first stay and the first shielding cardboard, the first shielding cardboard outside also is equipped with the secondary shielding cardboard, and has second stay between the first shielding cardboard and the secondary shielding cardboard.
Earth shield comprises the 3rd shielding cardboard, is coated with flanging paper groove on the outer surface of the 3rd shielding cardboard, is surrounded by Copper Foil on the flanging paper groove.
Earth shield and first stay of first shielding between the cardboard have a plurality of, and a plurality of first stays make up shielding construction with iron core side pole and count five equilibrium, and the circular arc between two first stays is long is 130mm～150mm; Second stay and the first stay correspondence position are placed, and the width of first stay and second stay is 30 ~ 40mm, and thickness is 20 ~ 25mm, highly equals the high h of window unshakable in one's determination.
The arc section of the first shielding cardboard cooperates with the arc section that first stay forms, and straightway covers the iron core side pole arm-tie, highly equals the high h of window unshakable in one's determination; The arc section of secondary shielding cardboard cooperates with the arc section that second stay forms, and straightway covers the iron core side pole arm-tie, and the height degree equals the high h of window unshakable in one's determination.
Actual effect of the present utility model is: by this iron core side pole combination shielding is installed, improved the compressive resistance between EHV transformer exterior loop and the iron core side pole; This iron core side pole combination shielding covers the iron core side pole surface adjacent with coil, has shielded the corner angle of iron core side pole stack, reduces the edges and corners partial discharge quantity; Because the raising of the compressive resistance between EHV transformer exterior loop and the iron core side pole, at the insulation distance that has shortened under the ad eundem voltage between transformer exterior loop and the iron core side pole, thereby reduced the distance between principal post unshakable in one's determination and the iron core side pole, reduced the material cost of transformer.
Description of drawings
Fig. 1 is EHV transformer iron core side pole combination shielding construction;
Fig. 2 is EHV transformer iron core side pole combination shielding construction A-A cutaway view;
Fig. 3 is the structural representation of the first shielding cardboard;
Fig. 4 is the structural representation of the first shielding cardboard and secondary shielding cardboard.
Embodiment
Below contrast accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, 2, a kind of EHV transformer iron core side pole combination shielding construction, comprise and be close to the earth shield 1 that other post is installed, first stay 2 and the first shielding cardboard 3, the first shielding cardboard, 3 outsides also are equipped with secondary shielding cardboard 5, and have second stay 4 between the first shielding cardboard 3 and the secondary shielding cardboard 5.
Earth shield 1 comprises on the outer surface of the 3rd shielding cardboard 8, the three shielding cardboards 8 and is coated with flanging paper groove 7, is surrounded by Copper Foil 6 on the flanging paper groove 7.
As shown in Figure 3, earth shield 1 and first stay 2 of first shielding between the cardboard 3 have a plurality of, and a plurality of first stays 2 make up shielding construction with iron core side pole and count five equilibrium, and the circular arc between two first stays 2 is long is 130mm～150mm; Second stay 4 and first stay, 2 correspondence positions are placed, and the width of first stay 2 and second stay 4 is 30 ~ 40mm, and thickness is 20 ~ 25mm, highly equals the high h of window unshakable in one's determination.Earth shield 1 is with flanging paper groove 7 dense being arranged on the 3rd shielding cardboard 8 circular arc external surface that are surrounded by Copper Foil 6, after then copper strips 9 and Copper Foil 6 being welded, pastes the thick insulating paper of one deck 0.1mm on the surface and forms.Wherein the straightway of the 3rd shielding cardboard 8 is as the criterion to cover the iron core side pole arm-tie, and arc section cooperates with the formed arc section of iron core side pole stack, and height is identical with transformer core window height; Between 0.05mm～0.1mm, width is between 40mm～50mm usually for Copper Foil 6 thickness, and length is identical with the 3rd shielding cardboard 8 lengths of run; Flanging paper groove 7 adopts the thick insulating paper of 0.1mm usually, and width is as the criterion Copper Foil 6 all can be encased, and length is identical with the 3rd shielding cardboard 8 lengths of run; Copper strips 9 common thickness are 0.3mm, and width is 40mm, and the T copper strips stretches out the 3rd shielding cardboard 8 lower end 50mm～100mm, is convenient to be connected ground connection with the iron core side pole arm-tie, and the bolt with M5 is connected with the iron core side pole arm-tie usually.Copper Foil 6, flanging paper groove 7 and the 3rd shielding cardboard 8 are pasted together.
As shown in Figure 2, the arc section of the first shielding cardboard 3 cooperates with the arc section that first stay 2 forms, and straightway covers the iron core side pole arm-tie, highly equals the high h of window unshakable in one's determination; The arc section of secondary shielding cardboard 5 cooperates with the arc section that second stay 4 forms, and straightway covers the iron core side pole arm-tie, and the height degree equals the high h of window unshakable in one's determination.Place first shielding cardboard 3 and the secondary shielding cardboard 5 in earth shield 1 outside successively, between the earth shield 1 and the first shielding cardboard 3, place first stay 2, between the first shielding cardboard 3 and secondary shielding cardboard 5, place second stay 4.First stay 2 makes up shielding construction with iron core side pole usually and counts five equilibrium, and the circular arc length between two bracing bars is between 130mm～150mm; Second stay 4 is placed with first stay, 2 correspondence positions on circular arc, and first stay 2 and second stay 4 are made by insulating board usually, and width is 30 ~ 40mm, and thickness 20 ~ 25mm highly equals the high h of window unshakable in one's determination; As shown in Figure 4, the arc section of the first shielding cardboard 3 cooperates with the arc section that first stay 2 forms, and straightway is as the criterion to cover the iron core side pole arm-tie, highly equals the high h of window unshakable in one's determination; The arc section of secondary shielding cardboard 5 cooperates with the arc section that second stay 4 forms, and straightway is as the criterion to cover the iron core side pole arm-tie, and the height degree equals the high h of window unshakable in one's determination.
As shown in Figure 4, the arc section of the first shielding cardboard 3 cooperates with the arc section that first stay 2 forms, and straightway is as the criterion to cover the iron core side pole arm-tie, highly equals the high h of window unshakable in one's determination; The arc section of secondary shielding cardboard 5 cooperates with the arc section that second stay 4 forms, and straightway is as the criterion to cover the iron core side pole arm-tie, and the height degree equals the high h of window unshakable in one's determination.
Claims (4)
1. an EHV transformer iron core side pole makes up shielding construction, comprise and be close to the earth shield (1) that other post is installed, first stay (2) and the first shielding cardboard (3), it is characterized in that: first shielding cardboard (3) outside also is equipped with secondary shielding cardboard (5), and has second stay (4) between the first shielding cardboard (3) and the secondary shielding cardboard (5).
2. EHV transformer iron core side pole combination shielding construction as claimed in claim 1, it is characterized in that: earth shield (1) comprises the 3rd shielding cardboard (8), be coated with flanging paper groove (7) on the outer surface of the 3rd shielding cardboard (8), be surrounded by Copper Foil (6) on the flanging paper groove (7).
3. EHV transformer iron core side pole combination shielding construction as claimed in claim 1, it is characterized in that: first stay (2) between the earth shield (1) and the first shielding cardboard (3) has a plurality of, a plurality of first stays (2) make up shielding construction with iron core side pole and count five equilibrium, and the length of the circular arc between two first stays (2) is 130mm～150mm; Second stay (4) and first stay (2) correspondence position are placed, and the width of first stay (2) and second stay (4) is 30 ~ 40mm, and thickness is 20 ~ 25mm, highly equals the high h of window unshakable in one's determination.
4. EHV transformer iron core side pole combination shielding construction as claimed in claim 1, it is characterized in that: the arc section of the first shielding cardboard (3) cooperates with the arc section that first stay (2) forms, straightway covers the iron core side pole arm-tie, highly equals the high h of window unshakable in one's determination; The arc section of secondary shielding cardboard (5) cooperates with the arc section that second stay (4) forms, and straightway covers the iron core side pole arm-tie, and the height degree equals the high h of window unshakable in one's determination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205786501U CN201829325U (en) | 2010-10-22 | 2010-10-22 | Iron core side-yoke combination shielding structure of ultra-high voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205786501U CN201829325U (en) | 2010-10-22 | 2010-10-22 | Iron core side-yoke combination shielding structure of ultra-high voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201829325U true CN201829325U (en) | 2011-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205786501U Expired - Fee Related CN201829325U (en) | 2010-10-22 | 2010-10-22 | Iron core side-yoke combination shielding structure of ultra-high voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201829325U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110211784A (en) * | 2019-05-28 | 2019-09-06 | 南通晓星变压器有限公司 | It is a kind of replace traditionally shielding shield manufacture craft novelly and novel shield |
| CN110444393A (en) * | 2019-08-01 | 2019-11-12 | 山东电力设备有限公司 | A kind of process that replacement transformer shields interiorly and dedicated hold round tooling |
| CN110797170A (en) * | 2018-08-01 | 2020-02-14 | 特变电工衡阳变压器有限公司 | Converter transformer |
-
2010
- 2010-10-22 CN CN2010205786501U patent/CN201829325U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797170A (en) * | 2018-08-01 | 2020-02-14 | 特变电工衡阳变压器有限公司 | Converter transformer |
| CN110211784A (en) * | 2019-05-28 | 2019-09-06 | 南通晓星变压器有限公司 | It is a kind of replace traditionally shielding shield manufacture craft novelly and novel shield |
| CN110444393A (en) * | 2019-08-01 | 2019-11-12 | 山东电力设备有限公司 | A kind of process that replacement transformer shields interiorly and dedicated hold round tooling |
| CN110444393B (en) * | 2019-08-01 | 2024-03-22 | 山东电力设备有限公司 | Technological method for replacing ground screen in transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20171022 |