CN202309062U - Lightning protection coil of distribution transformer - Google Patents
Lightning protection coil of distribution transformer Download PDFInfo
- Publication number
- CN202309062U CN202309062U CN2011204417006U CN201120441700U CN202309062U CN 202309062 U CN202309062 U CN 202309062U CN 2011204417006 U CN2011204417006 U CN 2011204417006U CN 201120441700 U CN201120441700 U CN 201120441700U CN 202309062 U CN202309062 U CN 202309062U
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- CN
- China
- Prior art keywords
- lightning protection
- high frequency
- lightning
- protection coil
- distribution transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a lightning protection coil of a distribution transformer, mainly used for preventing the lightning stroke damage accidents of the distribution transformer. The lightning protection coil is formed by making a plurality of axially arranged, electrically series-wound and multilayer wound wire cakes in series connections, and a high frequency magnetic bar is arranged along the axis direction in the wire cakes; an insulating supporting member is arranged between the wire cakes and the high frequency magnetic bar, and the gaps around the wire cakes and the gap around the high frequency magnetic bar are filled and sealed by insulating fillers. According to the structure of the utility model, a lightning wave is distributed evenly in the lightning protection coil, interturn discharge is prevented, inductance value is increased, lightning protection performance is improved, profile dimension is reduced, and the lightning protection coil of the distribution transformer is convenient to install and apply.
Description
Technical field
The utility model relates to a kind of distribution transformer lightning protection coil, is mainly used in the lightning damage accident that prevents distribution transformer.
Background technology
The thunderbolt of distribution transformer damages and mainly contains two kinds of reasons: first amplitude lightning voltage causes that the main insulation of transformer is damaged, it two is that steep wave head lightning voltage causes that Transformer Winding turn-to-turn insulation damages.Power industry standard " overvoltage protection and the insulation coordination of DL/T620-1997 alternating-current electric equipment " regulation need install lightning arrester additional at the inlet of distribution transformer high pressure winding, prevents that the thunderbolt of transformer from damaging.This lightning arrester is mainly used in the main insulation that prevents transformer and damages, and is inoperative to preventing turn-to-turn insulation.As a kind of additional measure, can between lightning arrester and transformer inlet, insert a lightning protection coil, its effect is to make the invasion ripple slow down, because of the wavefront reflection takes place lightning arrester is moved in advance simultaneously through steepness after the inductance of lightning protection coil.Mostly the structural shape of lightning protection coil is the birdcage coils of coiling on hollow wire frame.As " Liu war. reason and lightning protection measures [J] that Anfu microwave station distribution transformer is struck by lightning frequently and burns out. Jiangxi Electric Power, 2002, (3) " to propose this inductance coil in the literary composition be the about 30cm of diameter, the about 30cm of length, about 20 circles of the number of turn, the about 100 μ H of inductance value.
The shortcoming of above lightning protection coil is: (1) must be left enough distances for guaranteeing that the turn-to-turn discharge does not take place lightning protection coil itself under the lightning voltage effect between every circle, causes winding volume to increase; (2) above coil as use instead insulated conductor close around; Also can only be around one deck, and can not the multilayer lap wound, be example for example to adopt double-deck reciprocating type lap wound; Last circle of the second layer (last circle) can be overlapping on first assorted (first circle) of ground floor; During lightning surge intrusion, the whole voltages on the lightning protection coil act on the insulating barrier between head, this two circle of last circle, can make therebetween insulating barrier puncture, make that the lightning protection coil is first terminally the turn-to-turn discharge takes place and lost efficacy; (3) only about 100～200 μ H of inductance, inductance value is too small, acts on remarkable inadequately.
Summary of the invention
The technical problem that the utility model will solve is to overcome the deficiency described in the background technology, and the lightning protection coil of a kind of high-performance, compact structure is provided.
The technical scheme of the utility model is: in insulation crust, be provided with a plurality of multilayer lap wound line cakes by axially-aligned, connected in electrical series; Online cake inside is provided with the high frequency bar magnet along axis direction; Be provided with insulated support between line cake and the high frequency bar magnet; The head end that is positioned at the line cake of top layer links to each other with binding post on the top cover labyrinth; The tail end that is positioned at the line cake of bottom links to each other with binding post on the lower sealing cover, and solid envelope is filled by insulating packing in space around the line cake and the space around the high frequency bar magnet.
Compared with prior art, the good effect that the utility model produced is: (1) evenly distributes lightning wave in the lightning protection coil, has stopped in the lightning protection coil, to take place the turn-to-turn discharge.(2) effectively reduced the radial and axial size of lightning protection coil, be convenient to install and use.(3) significantly increased the inductance value of lightning protection coil, made its lightning protection properties be able to optimize and improve.
Description of drawings
Fig. 1: the structural representation of the utility model.
Fig. 2: the coiling sketch map of the multilayer lap wound line cake 2 of the utility model.
Embodiment
Fig. 1 representes the structural representation of an embodiment of the utility model; Be mainly and in insulation crust 1, be provided with a plurality of multilayer lap wound line cakes 2 by axially-aligned, connected in electrical series; Line cake 2 inside are provided with high frequency bar magnet 3 along axis direction; Be provided with insulated support 4 between line cake 2 and the high frequency bar magnet 3; The head end that is positioned at the line cake 2 of top layer links to each other with binding post 6 on the top cover labyrinth 5, and the tail end that is positioned at the line cake 2 of bottom links to each other with binding post 8 on the lower sealing cover 7, and solid envelope is filled by insulating packing 9 in the space around space around the line cake 2 and the high frequency bar magnet 3.
Fig. 2 representes a coiling example schematic of the multilayer lap wound line cake 2 of the utility model: between line cake 2 and the high frequency bar magnet 3 insulated support 4 is arranged; Line cake 2 usefulness insulated conductors back and forth overlapping close around; Every layer around 3 circles; Lap wound is 3 layers altogether, and a line cake has 9 circles, and the lightning protection coil is in series by a plurality of line cakes 2.
Below be that example is described further this lightning protection coil with Fig. 1 and Fig. 2: (1) since the lightning protection coil be in series by a plurality of line cakes 2; Lightning wave is during through the lightning protection coil; Lightning voltage is basic on each line cake evenly to distribute; Compare the coil of the reciprocal lap wound of single line cake, this lightning protection coil effectively reduces the turn-to-turn voltage between the coil inside different parts.(2) each line cake 2 only has the reciprocal lap wound of several circle coils, and the voltage between the two overlapped circle coils is very low, has guaranteed under the lightning wave effect, and the turn-to-turn discharge can not take place in the lightning protection coil.(3) placed high frequency bar magnet 3 in coil, make coil lightning wave through the time, compare hollow coil or common iron-core coil has bigger inductance, inductance reaches value and reaches to more than the 500 μ H, lightning protection effect is further optimized and is improved.(4) insulation crust is inner, and solid envelope is filled by insulating packing 9 in the space around space around the line cake 2 and the high frequency bar magnet 3, has guaranteed under the lightning wave effect, and the first terminal short circuit dischange of lightning protection coil can not take place.
Claims (1)
1. distribution transformer lightning protection coil; It is characterized in that: in insulation crust (1), be provided with a plurality of multilayer lap wound line cakes (2) by axially-aligned, connected in electrical series; Line cake (2) is inner to be provided with high frequency bar magnet (3) along axis direction; Be provided with insulated support (4) between line cake (2) and the high frequency bar magnet (3); The head end that is positioned at the line cake (2) of top layer links to each other with binding post (6) on the top cover labyrinth (5), and the tail end that is positioned at the line cake (2) of bottom links to each other with binding post (8) on the lower sealing cover (7), and solid envelope is filled by insulating packing (9) in line cake (2) space and high frequency bar magnet (3) space on every side on every side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204417006U CN202309062U (en) | 2011-11-09 | 2011-11-09 | Lightning protection coil of distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204417006U CN202309062U (en) | 2011-11-09 | 2011-11-09 | Lightning protection coil of distribution transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202309062U true CN202309062U (en) | 2012-07-04 |
Family
ID=46377876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204417006U Expired - Fee Related CN202309062U (en) | 2011-11-09 | 2011-11-09 | Lightning protection coil of distribution transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202309062U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801149A (en) * | 2012-08-14 | 2012-11-28 | 合肥南南电力保护设备有限公司 | Wire inlet protector |
| CN104833873A (en) * | 2015-04-03 | 2015-08-12 | 华南理工大学 | Inductance current-limiting lightning rod lightning protection effect theoretical verification method |
-
2011
- 2011-11-09 CN CN2011204417006U patent/CN202309062U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801149A (en) * | 2012-08-14 | 2012-11-28 | 合肥南南电力保护设备有限公司 | Wire inlet protector |
| CN104833873A (en) * | 2015-04-03 | 2015-08-12 | 华南理工大学 | Inductance current-limiting lightning rod lightning protection effect theoretical verification method |
| CN104833873B (en) * | 2015-04-03 | 2017-12-01 | 华南理工大学 | A kind of theoretical validation method of inductive type current-limited arrester lightning protection effect |
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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 |
Granted publication date: 20120704 Termination date: 20151109 |
|
| EXPY | Termination of patent right or utility model |