CN106653324A - Voltage-regulating winding end part insulating structure for controlling creepage for transformer - Google Patents
Voltage-regulating winding end part insulating structure for controlling creepage for transformer Download PDFInfo
- Publication number
- CN106653324A CN106653324A CN201611086632.XA CN201611086632A CN106653324A CN 106653324 A CN106653324 A CN 106653324A CN 201611086632 A CN201611086632 A CN 201611086632A CN 106653324 A CN106653324 A CN 106653324A
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- Prior art keywords
- tap
- voltage
- changing windings
- multilayer
- climbed
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention relates to a voltage-regulating winding end part insulating structure for controlling creepage for a transformer, and belongs to the technical field of a transformer manufacturing process. According to a technical scheme, a voltage-regulating winding adopts a dual-layer cylinder type structure; a multilayer thick paper tube-supporting strip structure (1) is arranged at the upper end of the voltage-regulating winding (3); and a multilayer positive and negative angle ring mutual-enfolding structure (2) is arranged between a static ring (4) of the voltage-regulating winding (3) and the thick paper tube-supporting strip structure (1), so that an effect of optimizing creepage field strength on two directions is achieved. The voltage-regulating winding end part insulating structure has the beneficial effects as follows: the end part edge of the multilayer thick paper tube-supporting strip structure is arranged at the upper end of the voltage-regulating winding of an ultra-high-voltage converter transformer, so that a creepage path on the surface of an oil tank on a high-potential region at grid side winding end part can be controlled; and therefore, the insulation level of the ultra-high-voltage converter transformer is effectively lowered, and the safety operation of the converter transformer is ensured.
Description
Technical field
The present invention relates to the tap-changing windings overhang insulation structure of electricity is climbed in a kind of transformer control, belong to transformer technique system
Make technical field.
Background technology
As China's power transmission engineering constantly develops, grid power transmission voltage is constantly lifted.In recent years, country promotes energetically simultaneously
DC transmission engineering, net side 750kV, 1000kV electric pressures change of current change is gradually applied in engineering construction.Voltage on line side grade
It is to ensure insulation distance after raising, typically source side winding and tap-changing windings is placed in into outside.Because extra-high voltage source side winding bears
Voltage is higher, easily in spoke tank wall is formed upwardly through the end circle surface on tap-changing windings top and climbs electrical breakdown.Meanwhile, net side end
During the radial outlet in portion, also tap-changing windings are formed climb electrical breakdown in the axial direction easily by paper web or end circle.On the two directions
Power path of climbing mutually restrict, when insulating structure design is carried out, often cut off on a direction and climb power path, allow for another
Creep distance is long on one direction.In the converter power transformer of 500kV and following electric pressure, as long as having enough insulation distances just
It can be made to be readily obtained in solution, but the converter power transformer more than net side 750kV, just the technology into urgent need to resolve is difficult
Topic.
The content of the invention
It is an object of the present invention to provide the tap-changing windings overhang insulation structure of electricity is climbed in a kind of transformer control, to control net side
Winding climbs power path to improve transformer insulation structure by pressure regulation overhang insulation to oil tank wall, effectively reduce extra-high voltage net side around
Group and lead climb electric-field strength to tank wall and tap-changing windings, improve transformer service life, solve on present in background technology
State problem.
The technical scheme is that：
The tap-changing windings overhang insulation structure of electricity is climbed in a kind of control of transformer, comprising tap-changing windings, ground paper cylinder-stay structure and
The mutual obvolvent structure of the positive and negative square ring of multilayer, arranges multi-layer thick paper web-stay structure and replaces former end circle knot in tap-changing windings upper end
Structure, has effectively completely cut off source side winding areas of high potential and has climbed power path to tank wall upwardly through detached end circle surface in spoke；But
Also cause the axially radial outlet of online side end long to the creep age distance of tap-changing windings simultaneously, so as to need to take following measure
To ensure axial to climb electric nargin；
First, tap-changing windings adopt double-layer barrel type structure, effectively reduce voltage regulation coil whole height, it is ensured that insulation distance；Secondly,
Below tap-changing windings end ground paper cylinder-stay structure, the mutual obvolvent structure of the positive and negative square ring of multilayer is set, a closing knot is formed
Structure, power path is climbed so as to block in both direction, makes climbing electric-field strength and can meet requirement in both direction.
Multi-layer thick paper web-the stay structure, is exactly to arrange multilayer paper web in tap-changing windings upper end, and with stay cloth is spaced
Put, power path is climbed to oil tank wall to limit high pressure source side winding.
The mutual obvolvent structure of the positive and negative square ring of the multilayer, is arranged on the electrostatic ring and ground paper cylinder-stay structure of tap-changing windings
Between, interted mutually with the dihedral ring of multilayer using the positive square ring of multilayer, mutually embrace, closing insulation system is formed, split oil clearance,
Limit simultaneously and climb power path in radial and axial both direction.
Present invention has the advantages that：In UHV tap-changing windings upper end, multi-layer thick paper web-stay knot is set
The overhang insulation of structure, can control source side winding end areas of high potential and climb power path to tank surface, effectively reduce spy
High-voltage commutation becomes the dielectric level of device body, it is ensured that the change of current becomes safe operation.
Description of the drawings
Fig. 1 is embodiment of the present invention structural representation；
In figure：The mutual obvolvent structure 2 of ground paper cylinder-positive and negative square ring of stay structure 1, multilayer, tap-changing windings 3, electrostatic ring 4.
Specific embodiment
Below in conjunction with accompanying drawing, by embodiment, the invention will be further described.
The tap-changing windings overhang insulation structure of electricity is climbed in a kind of transformer control, comprising tap-changing windings 3, ground paper cylinder-stay
Structure 1 and the mutual obvolvent structure 2 of the positive and negative square ring of multilayer, in the upper end of tap-changing windings 3 multi-layer thick paper web-generation of stay structure 1 is arranged
For former end coil structures, source side winding areas of high potential is effectively completely cut off and in spoke tank wall has been climbed upwardly through detached end circle surface
Power path；But while also cause the axially radial outlet of online side end long to the creep age distance of tap-changing windings, so as to need to adopt
Take following measure to ensure axial to climb electric nargin；
First, tap-changing windings adopt double-layer barrel type structure, effectively reduce voltage regulation coil whole height, it is ensured that insulation distance；Secondly,
Below tap-changing windings end ground paper cylinder-stay structure 1, the mutual obvolvent structure 2 of the positive and negative square ring of multilayer is set, a closing is formed
Structure, power path is climbed so as to block in both direction, makes climbing electric-field strength and can meet requirement in both direction.
Multi-layer thick paper web-the stay structure 1, is exactly to arrange multilayer paper web in the upper end of tap-changing windings 3, with stay interval
Arrangement, power path is climbed to limit high pressure source side winding to oil tank wall.
The mutual obvolvent structure 2 of the positive and negative square ring of the multilayer, is arranged on the electrostatic ring 4 and ground paper cylinder-stay knot of tap-changing windings 3
Between structure 1, interted mutually with the dihedral ring of multilayer using the positive square ring of multilayer, mutually embraced, form closing insulation system, segmentation oil
Gap, while to limit climb power path in radial and axial both direction.
In embodiment, tap-changing windings adopt double-layer barrel type structure, it has been effectively ensured and has arrived source side winding end and net side
The insulation distance of the radial outlet in end；Several layers of insulating cylinder are set in the top of tap-changing windings 3, with stay arranged for interval, per layer of insulation
Cylinder is thick for 3mm, and power path is climbed to oil tank wall to completely cut off source side winding upper end；It is thick with top in the electrostatic ring 4 of tap-changing windings
Between paper web-stay structure, the mutual obvolvent structure 2 of the positive and negative square ring of multilayer is set, to be reached and climb electric-field strength in optimization both direction
Effect.
Claims (3)
1. the tap-changing windings overhang insulation structure of electricity is climbed in a kind of transformer control, it is characterised in that：Comprising tap-changing windings（3）、
Ground paper cylinder-stay structure（1）With the mutual obvolvent structure of the positive and negative square ring of multilayer（2）, in tap-changing windings（3）Upper end arranges multi-layer thick
Paper web-stay structure（1）Replace former end coil structures, effectively completely cut off source side winding areas of high potential in spoke upwardly through detached
Power path is climbed in end circle surface to tank wall；But while also cause the axially radial outlet of online side end to tap-changing windings climb electricity away from
From long, ensure axial to climb electric nargin so as to need to take following measure；
First, tap-changing windings adopt double-layer barrel type structure, effectively reduce voltage regulation coil whole height, it is ensured that insulation distance；Secondly,
Ground paper cylinder-stay structure in tap-changing windings end（1）Lower section, arranges the mutual obvolvent structure of the positive and negative square ring of multilayer（2）, form one
Enclosed construction, power path is climbed so as to block in both direction, makes climbing electric-field strength and can meet requirement in both direction.
2. the tap-changing windings overhang insulation structure of electricity is climbed in a kind of transformer control according to claim 1, and its feature exists
In：Multi-layer thick paper web-the stay structure（1）, it is exactly in tap-changing windings（3）Upper end arranges multilayer paper web, with stay interval
Arrangement, power path is climbed to limit high pressure source side winding to oil tank wall.
3. the tap-changing windings overhang insulation structure of electricity is climbed in a kind of transformer control according to claim 2, and its feature exists
In：The mutual obvolvent structure of the positive and negative square ring of the multilayer（2）, it is arranged on tap-changing windings（3）Electrostatic ring（4）With ground paper cylinder-stay
Structure（1）Between, interted mutually with the dihedral ring of multilayer using the positive square ring of multilayer, mutually embrace, closing insulation system is formed, point
Oil clearance is cut, while to limit climb power path in radial and axial both direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611086632.XA CN106653324A (en) | 2016-12-01 | 2016-12-01 | Voltage-regulating winding end part insulating structure for controlling creepage for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611086632.XA CN106653324A (en) | 2016-12-01 | 2016-12-01 | Voltage-regulating winding end part insulating structure for controlling creepage for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106653324A true CN106653324A (en) | 2017-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611086632.XA Pending CN106653324A (en) | 2016-12-01 | 2016-12-01 | Voltage-regulating winding end part insulating structure for controlling creepage for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106653324A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110176345A (en) * | 2019-05-20 | 2019-08-27 | 保定天威保变电气股份有限公司 | A kind of the resistance to shorting structure and method of 220kV insulating part of transformer |
| CN113270244A (en) * | 2021-04-25 | 2021-08-17 | 山东输变电设备有限公司 | Converter transformer coil structure with novel forming angle ring and manufacturing method thereof |
| WO2022082880A1 (en) * | 2020-10-21 | 2022-04-28 | 吴江变压器有限公司 | End insulation device for voltage regulation coil of oil-immersed power transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104752039A (en) * | 2015-04-14 | 2015-07-01 | 保定天威集团特变电气有限公司 | Insulation structure of 132 kV duplex-winding on-load tap changing transformer |
| CN104752035A (en) * | 2015-04-14 | 2015-07-01 | 保定天威集团特变电气有限公司 | Part structure of 220 kV grade large-capacity dual-splitting power transformer |
| US20150287526A1 (en) * | 2012-09-29 | 2015-10-08 | Alstom Technology Limited | Single-phase electric furnace transformer |
| CN206225174U (en) * | 2016-12-01 | 2017-06-06 | 保定天威保变电气股份有限公司 | The tap-changing windings overhang insulation structure of electricity is climbed in a kind of transformer control |
-
2016
- 2016-12-01 CN CN201611086632.XA patent/CN106653324A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150287526A1 (en) * | 2012-09-29 | 2015-10-08 | Alstom Technology Limited | Single-phase electric furnace transformer |
| CN104752039A (en) * | 2015-04-14 | 2015-07-01 | 保定天威集团特变电气有限公司 | Insulation structure of 132 kV duplex-winding on-load tap changing transformer |
| CN104752035A (en) * | 2015-04-14 | 2015-07-01 | 保定天威集团特变电气有限公司 | Part structure of 220 kV grade large-capacity dual-splitting power transformer |
| CN206225174U (en) * | 2016-12-01 | 2017-06-06 | 保定天威保变电气股份有限公司 | The tap-changing windings overhang insulation structure of electricity is climbed in a kind of transformer control |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110176345A (en) * | 2019-05-20 | 2019-08-27 | 保定天威保变电气股份有限公司 | A kind of the resistance to shorting structure and method of 220kV insulating part of transformer |
| WO2022082880A1 (en) * | 2020-10-21 | 2022-04-28 | 吴江变压器有限公司 | End insulation device for voltage regulation coil of oil-immersed power transformer |
| CN113270244A (en) * | 2021-04-25 | 2021-08-17 | 山东输变电设备有限公司 | Converter transformer coil structure with novel forming angle ring and manufacturing method thereof |
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Application publication date: 20170510 |