CN103559987B - A kind of extra-high voltage transformer outgoing line device - Google Patents
A kind of extra-high voltage transformer outgoing line device Download PDFInfo
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- CN103559987B CN103559987B CN201310569362.8A CN201310569362A CN103559987B CN 103559987 B CN103559987 B CN 103559987B CN 201310569362 A CN201310569362 A CN 201310569362A CN 103559987 B CN103559987 B CN 103559987B
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Abstract
The present invention relates to transformator electric insulation technical field, be specifically related to a kind of extra-high voltage transformer outgoing line device. It is the shielded-plate tube of flare openings that this device includes being provided with thin portion, two ends outward expansion gradually in the middle of one, shielded-plate tube both ends open place is respectively provided with a grading ring, a shading ring it is respectively provided with outside two grading rings, two shading rings be arranged in parallel, shading ring is circumferentially coated with a layer insulating, being additionally provided with radome outside shading ring, shading ring is connected ground connection by earth lead with inside shielded-plate tube. Metallic shield pipe is carried out multi-layer, Combined insulating protection by structures such as shading ring, insulating boot, insulating part, insulating boards by whole device, is effectively improved insulation shielding effect, improves pressure grade, it is ensured that meets super extra-high voltage transformer compressive resistance requirement. The present invention adopts grading ring and shading ring fit structure, controls electric discharge flashover and occurs between two rings, it is possible to active balance Electric Field Distribution, greatly reduces the risk that generation office puts.
Description
Technical field
The present invention relates to transformator electric insulation technical field, be specifically related to a kind of extra-high voltage transformer outgoing line device.
Background technology
In extra-high voltage alternating current-direct current transformator, the line end electric pressure that goes between is high, and electric field intensity is big, and pin configuration is complicated, and the accessory structure such as folder, fuel tank is irregular, in local it may happen that field intensity distorts. Especially being connected place at lead-in wire and sleeve pipe, operating condition is increasingly complex, it is possible to cause shelf depreciation, even punctures. Along with the input of DC engineering, the advantage of direct current transportation progressively embodies, and the change of current simultaneously becomes the capital equipment as DC transmission engineering, and its electric pressure is also being stepped up. Currently, industry inherence carries out 1000 kilovolts of AC system converter power transformer key technology research of layer-specific access, and its net head end adopts 750kV or 1000kV electric pressure outlet, and difficulty is self-evident. Adopt on the basis that the outlet of 500kV electric pressure has reached its maturity in net side, in the urgent need to studying a kind of extra-high voltage transformer end outgoing line device, realize the net side end outlet of this converter power transformer.
Summary of the invention
Cannot meet, for current end outgoing line device electric pressure, the problem that super extra-high voltage transformer compressive resistance requires, the invention provides a kind of class of insulation extra-high voltage transformer outgoing line device high, that all pressure shield effectiveness is good.
For achieving the above object, the technical scheme is that a kind of extra-high voltage transformer outgoing line device, being provided with thin portion, two ends outward expansion gradually including a centre is the shielded-plate tube of flare openings, shielded-plate tube both ends open place is respectively provided with a grading ring, being respectively provided with a shading ring outside two grading rings, two shading rings be arranged in parallel, and shading ring is circumferentially coated with a layer insulating, being additionally provided with radome outside shading ring, shading ring is connected ground connection by earth lead with inside shielded-plate tube. The present invention adopts the shielded-plate tube that middle thin two ends are thick, facilitate inlet wire and the outlet of transformator lead-out wire, lead-out wire passes in shielded-plate tube, obtains primary shield effect, then, grading ring through shielded-plate tube two ends, can effectively uniform electric field around lead, lead-in wire again passes through the shading ring in outside, is additionally provided with radome outside shading ring, electric field around lead is shielded further, shield effectiveness can be fully ensured that.
Except above-mentioned three layers shielding construction, the present invention also has multi-insulation structure, is first be surrounded by insulating barrier outside shading ring, it is ensured that the insulation effect of shading ring, secondly, is provided with insulating part, is provided externally with insulating boot in described shielded-plate tube. Insulate inside and outside pipe simultaneously, reduce distortion field intensity, improve insulation margin, thus be connected at lead-in wire and sleeve pipe place and the complex position of other operating conditions, it is possible to it is prevented effectively from the generation of shelf depreciation, meets super extra-high voltage transformer compressive resistance requirement.
For ensureing insulation effect further, described insulating boot outer is radially provided with multilayer insulation cardboard, is provided with insulating stay to improve its mechanical strength between each layer insulating board, and insulating board can be split oil clearance and increase creep age distance, thus being effectively reduced field intensity.
Preferably, described insulating boot is multi-layer forming an insulating shroud.
Preferably, described insulating barrier is insulation crimped paper.
Preferably, shielded-plate tube, shading ring and radome are all adopted and are formed from aluminium.
There is advantages that
1, metallic shield pipe is carried out multi-layer by structures such as shading ring, insulating boot, insulating part, insulating boards by whole device, Combined insulating protects, it is effectively improved insulation shielding effect, improve pressure grade, it is ensured that meet super extra-high voltage transformer compressive resistance requirement.
2, the present invention adopts grading ring and shading ring fit structure, controls electric discharge flashover and occurs between two rings, it is possible to active balance Electric Field Distribution, greatly reduces the risk that generation office puts.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the use state diagram of the present invention;
In figure, 1, shading ring I, 2, radome, 3, shielded-plate tube, 4, insulating part, 5, insulating boot, 6, grading ring, 7, shading ring II, 8, insulating barrier, 9, earth lead, 10, insulating board, 11, insulating stay, 12, sleeve pipe, 13, shading ring III, 14, support.
Detailed description of the invention
A kind of extra-high voltage transformer outgoing line device, as shown in Figure 1, it is provided with, in the middle of one, the shielded-plate tube 2 that thin portion, two ends outward expansion gradually is flare openings, shielded-plate tube 2 both ends open place is respectively provided with a grading ring 6, being respectively equipped with shading ring I 1 and shading ring II 7 outside two grading rings 6, two shading rings are parallel. Each shading ring is circumferentially coated with a layer insulating 8, is equipped with arc and inwardly surrounds the radome 2 of shading ring outside two shading rings, and two shading rings are connected ground connection by earth lead 9 with inside shielded-plate tube 3. Described insulating barrier 8 is insulation crimped paper. It is provided with insulating part 4 in described shielded-plate tube 3, is provided externally with insulating boot 5. Insulating part 4 adopts the molded insulator having some strength, and insulating boot 5 adopts multi-layer forming an insulating shroud. Described insulating boot 5 outer is radially provided with multilayer insulation cardboard 10, is provided with insulating stay 11 between each layer insulating board 10. Shielded-plate tube, shading ring and radome are all adopted and are formed from aluminium.
As in figure 2 it is shown, the present invention is in use, sleeve pipe 12 afterbody inserts in outgoing line device of the present invention, for sleeve pipe is shielded further, being externally provided with shading ring III 13 at sleeve pipe 12, both are connected by support 14, and the outside of shading ring III 13 and shading ring II 7 is integrated through radome 2 cladding. Utilizing the present invention, sleeve pipe inserts shading ring, the degree of depth of radome can need to be adjusted according to running environment, for instance insertion depth can be suitably reduced in many thunders and lightnings area, is improving voltage's distribiuting and is guaranteeing seeking balance point between lightning impulse flashover voltage.
Claims (5)
1. an extra-high voltage transformer outgoing line device, it is characterized in that: include being provided with, in the middle of one, the shielded-plate tube (3) that thin portion, two ends outward expansion gradually is flare openings, shielded-plate tube (3) both ends open place is respectively provided with a grading ring (6), a shading ring it is respectively provided with outside two grading rings, two shading rings be arranged in parallel, shading ring is circumferentially coated with a layer insulating, being additionally provided with radome (2) outside shading ring, shading ring is connected ground connection by earth lead (9) with shielded-plate tube (3) inner side; It is provided with insulating part (5) in described shielded-plate tube (3), is provided externally with insulating boot (4).
2. extra-high voltage transformer outgoing line device according to claim 1, it is characterised in that: described insulating boot (4) outer is radially provided with multilayer insulation cardboard (10), is provided with insulating stay (11) between each layer insulating board.
3. extra-high voltage transformer outgoing line device according to claim 2, it is characterised in that: described insulating boot (4) is multi-layer forming an insulating shroud.
4. extra-high voltage transformer outgoing line device according to claim 1, it is characterised in that: described insulating barrier (8) is insulation crimped paper.
5. the extra-high voltage transformer outgoing line device according to claim 3 or 4, it is characterised in that: shielded-plate tube, shading ring and radome are all adopted and are formed from aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310569362.8A CN103559987B (en) | 2013-11-15 | 2013-11-15 | A kind of extra-high voltage transformer outgoing line device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310569362.8A CN103559987B (en) | 2013-11-15 | 2013-11-15 | A kind of extra-high voltage transformer outgoing line device |
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| Publication Number | Publication Date |
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| CN103559987A CN103559987A (en) | 2014-02-05 |
| CN103559987B true CN103559987B (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310569362.8A Active CN103559987B (en) | 2013-11-15 | 2013-11-15 | A kind of extra-high voltage transformer outgoing line device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106783082A (en) * | 2016-12-09 | 2017-05-31 | 徐超 | A kind of oil immersed type capacitance graded bushing |
| CN106653321B (en) * | 2016-12-14 | 2018-12-11 | 山东电力设备有限公司 | A kind of converter power transformer lead arragement construction |
| CN106848640B (en) * | 2017-04-06 | 2022-10-28 | 山东电力设备有限公司 | Special wiring terminal for grading ring |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102543390A (en) * | 2012-02-27 | 2012-07-04 | 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 |
| CN202650803U (en) * | 2012-04-27 | 2013-01-02 | 正泰电气股份有限公司 | 500 KV lead-out device for transformer |
| CN103227039A (en) * | 2013-05-16 | 2013-07-31 | 山东电力设备有限公司 | Extra-high voltage transformer coil out device |
| CN203521131U (en) * | 2013-11-15 | 2014-04-02 | 山东电力设备有限公司 | Lead-out device for ultra-high voltage transformer |
-
2013
- 2013-11-15 CN CN201310569362.8A patent/CN103559987B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102543390A (en) * | 2012-02-27 | 2012-07-04 | 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 |
| CN202650803U (en) * | 2012-04-27 | 2013-01-02 | 正泰电气股份有限公司 | 500 KV lead-out device for transformer |
| CN103227039A (en) * | 2013-05-16 | 2013-07-31 | 山东电力设备有限公司 | Extra-high voltage transformer coil out device |
| CN203521131U (en) * | 2013-11-15 | 2014-04-02 | 山东电力设备有限公司 | Lead-out device for ultra-high voltage transformer |
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| Publication number | Publication date |
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| CN103559987A (en) | 2014-02-05 |
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