CN206225174U - The tap-changing windings overhang insulation structure of electricity is climbed in a kind of transformer control - Google Patents
The tap-changing windings overhang insulation structure of electricity is climbed in a kind of transformer control Download PDFInfo
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- CN206225174U CN206225174U CN201621305561.3U CN201621305561U CN206225174U CN 206225174 U CN206225174 U CN 206225174U CN 201621305561 U CN201621305561 U CN 201621305561U CN 206225174 U CN206225174 U CN 206225174U
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Abstract
The utility model is related to a kind of transformer control to climb the tap-changing windings overhang insulation structure of electricity, belongs to transformer process manufacturing technology field.Technical scheme is：Tap-changing windings use double-layer barrel type structure, in tap-changing windings（3）Upper end sets multi-layer thick paper web stay structure（1）, in tap-changing windings（3）Electrostatic ring（4）With ground paper cylinder stay structure（1）Between, the mutual obvolvent structure of the positive and negative square ring of multilayer is set（2）, reach the effect for climbing electric-field strength in optimization both direction.The utility model beneficial effect is：In UHV tap-changing windings upper end, the overhang insulation of multi-layer thick paper web stay structure is set, source side winding end areas of high potential can be controlled to climb power path to tank surface, effectively reduce the dielectric level of extra-high voltage converter transformer, it is ensured that the change of current becomes safe operation.
Description
Technical field
The utility model is related to a kind of transformer control to climb the tap-changing windings overhang insulation structure of electricity, belongs to transformer work
Skill manufacturing technology field.
Background technology
As China's power transmission engineering is continued to develop, grid power transmission voltage is constantly lifted.In recent years, country promotes energetically simultaneously
DC transmission engineering, net side 750kV, 1000kV voltage class change of current change is gradually applied in engineering construction.Voltage on line side grade
After raising, to ensure insulation distance, source side winding and tap-changing windings are typically placed in outside.Because extra-high voltage source side winding bears
Voltage is higher, easily tank wall is formed upwardly through the end circle surface on tap-changing windings top in spoke 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 voltage class, as long as having enough insulation distances just
It can be made to be readily obtained solution, but in the converter power transformer of more than net side 750kV, the technology just into urgent need to resolve is difficult
Topic.
Utility model content
The utility model purpose is to provide the tap-changing windings overhang insulation structure that electricity is climbed in a kind of transformer control, to control
Source side winding climbs power path to improve transformer insulation structure by pressure regulation overhang insulation to oil tank wall, effectively reduces extra-high pressure network
Side winding and lead climb electric-field strength to tank wall and tap-changing windings, improve transformer service life, solve to exist in background technology
Above mentioned problem.
The technical solution of the utility model is：
The tap-changing windings overhang insulation structure of electricity is climbed in a kind of transformer control, comprising tap-changing windings, ground paper cylinder-stay knot
Structure and the mutual obvolvent structure of the positive and negative square ring of multilayer, multi-layer thick paper web-stay structure, effectively isolation are set in tap-changing windings upper end
Source side winding areas of high potential to tank wall climbs power path in spoke upwardly through separate end circle surface；But also cause axle simultaneously
The upward radial outlet in net side end is long to the creep age distance of tap-changing windings, so as to need to take following measure axial to ensure
Climb electric nargin；
First, tap-changing windings use double-layer barrel type structure, effectively reduce voltage regulation coil whole height, it is ensured that insulation distance；
Secondly, below the ground paper cylinder-stay structure of tap-changing windings end, the mutual obvolvent structure of the positive and negative square ring of multilayer is set, one is formed
Enclosed construction, so as to block from power path is climbed 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 set multilayer paper web in tap-changing windings upper end, and cloth is spaced with stay
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 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.
The utility model beneficial effect is：In UHV tap-changing windings upper end, multi-layer thick paper web-support is set
The overhang insulation of bar structure, can control source side winding end areas of high potential to climb power path to tank surface, effectively reduce
The dielectric level of extra-high voltage converter transformer, it is ensured that the change of current becomes safe operation.
Brief description of the drawings
Fig. 1 is the utility model example structure schematic diagram；
In figure：The mutual obvolvent structure 2 of the positive and negative square ring of ground paper cylinder-stay structure 1, multilayer, the electrostatic ring 4 of tap-changing windings 3.
Specific embodiment
Below in conjunction with accompanying drawing, by embodiment, the utility model is described in further detail.
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, multi-layer thick paper web-generation of stay structure 1 is set in the upper end of tap-changing windings 3
For former end coil structures, source side winding areas of high potential is effectively completely cut off and tank wall has been climbed upwardly through separate end circle surface in spoke
Power path；But also cause the axially online radial outlet of side end long to the creep age distance of tap-changing windings simultaneously, so as to need to adopt
Following measure is taken to ensure axial to climb electric nargin；
First, tap-changing windings use 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, formation one are set
Individual enclosed construction, so as to block from power path is climbed in both direction, make in both direction climb electric-field strength can meet want
Ask.
Multi-layer thick paper web-the stay structure 1, is exactly to set multilayer paper web in the upper end of tap-changing windings 3, is spaced with stay
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 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 climbing power path in the radial and axial both direction of limitation.
In embodiment, tap-changing windings use 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, every 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 sets multi-layer thick
Paper web-stay structure（1）；Tap-changing windings use double-layer barrel type structure, in tap-changing windings end ground paper cylinder-stay structure（1）Under
Side, sets the mutual obvolvent structure of the positive and negative square ring of multilayer（2）, form an enclosed construction.
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 sets multilayer paper web, is spaced with stay
Arrangement.
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 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, form closing insulation system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621305561.3U CN206225174U (en) | 2016-12-01 | 2016-12-01 | The tap-changing windings overhang insulation structure of electricity is climbed in a kind of transformer control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621305561.3U CN206225174U (en) | 2016-12-01 | 2016-12-01 | The tap-changing windings overhang insulation structure of electricity is climbed in a kind of transformer control |
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| Publication Number | Publication Date |
|---|---|
| CN206225174U true CN206225174U (en) | 2017-06-06 |
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| CN201621305561.3U Active CN206225174U (en) | 2016-12-01 | 2016-12-01 | The tap-changing windings overhang insulation structure of electricity is climbed in a kind of transformer control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653324A (en) * | 2016-12-01 | 2017-05-10 | 保定天威保变电气股份有限公司 | Voltage-regulating winding end part insulating structure for controlling creepage for transformer |
-
2016
- 2016-12-01 CN CN201621305561.3U patent/CN206225174U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653324A (en) * | 2016-12-01 | 2017-05-10 | 保定天威保变电气股份有限公司 | Voltage-regulating winding end part insulating structure for controlling creepage for transformer |
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