CN102543393A - Suspension end insulation structure with transformer coil inserted with shielding wire - Google Patents
Suspension end insulation structure with transformer coil inserted with shielding wire Download PDFInfo
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- CN102543393A CN102543393A CN2012100363538A CN201210036353A CN102543393A CN 102543393 A CN102543393 A CN 102543393A CN 2012100363538 A CN2012100363538 A CN 2012100363538A CN 201210036353 A CN201210036353 A CN 201210036353A CN 102543393 A CN102543393 A CN 102543393A
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- shielding wire
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Abstract
The invention discloses a suspension end insulation structure with a transformer coil inserted with a shielding wire. The suspension end insulation structure comprises a coil current carrying wire and a coil shielding wire distributed at an interval. An end part of the coil shielding wire is connected to a paperboard strip; aluminum metallization crepe papers are covered at outer sides of a suspension end of the coil shielding wire and the contact part of the coil shielding wire and the paperboard strip; a Denison paper is covered at the outer side of the paperboard strip; and the suspension end of the coil shielding wire is in a round corner structure. The invention has the advantages that an existing shielding suspension end which is not treated or is subjected to simple wrapping is changed into a standard insulation structure, so that a local discharge initial voltage at the suspension end is effectively increased, simultaneously the electric field intensity of two adjacent oil conduits at the shielding suspension end and a horizontal oil conduit size between two adjacent shielding suspension ends are reduced; the service life of the transformer is prolonged; and the production cost is lowered.
Description
Technical field
The present invention relates to the suspension end insulation system that a kind of transformer coil inserts shielded conductor, belong to the outstanding end of transformer inner shield-continuous winding shielding conductor insulation system, belong to insulation wrapping mode structure.
Background technology
Present stage; Since the user to the office of transformer put, useful life and reliability requirement be harsh more, and the outstanding end of shielded conductor is to cause partial discharge quantity to increase one of reason of adjacent two line cake oil duct oversized; In order to control partial discharge quantity; Guarantee that the adjacent lines cake shields outstanding electric field strength of holding in field strength range allowable, just must thicken the turn insulation thickness and the outstanding size of holding oil duct of adjacent shields of current carrying conductor and shielded conductor, thereby satisfy the specification requirement of transformer partial discharge.Cause volume of transformer to increase, waste of raw materials, reliability are difficult for guaranteeing for this reason.
Summary of the invention
The present invention is in order to remedy the deficiency of prior art, and a kind of simple in structure, suspension end insulation system that transformer coil that wrapping is convenient, reliability is high inserts shielded conductor is provided.
The present invention realizes through following technical scheme:
Transformer coil of the present invention inserts the suspension end insulation system of shielding conductor; Comprise coil current carrying conductor spaced apart and coil shielded conductor; Its special character is: the end of coil shielded conductor connects paperboard strip; The outside, contact position of the suspension end of coil shielded conductor, coil shielded conductor and paperboard strip all is surrounded by aluminum metallization crimped paper, and the outside of paperboard strip is surrounded by Denison paper, and the suspension end of coil shielded conductor is the corners structure.
The invention has the beneficial effects as follows; By the outstanding end of original shielding do not handle or simple dressing once; Become a kind of standardized insulation system; Thereby improved the partial discharge inception voltage at this place effectively, can also reduce to shield the electric field strength of outstanding end place two adjacent oil ducts simultaneously, reduced adjacent two screens and led the lateral oil road size of covering outstanding end; Prolong the useful life of transformer, reduced manufacturing cost.This structure is mainly used in the line segment place, end (shielding) of the bigger power transformer winding of 110kV and above electric pressure and capacity.
Description of drawings
Fig. 1 is shielded conductor and current carrying conductor relative position sketch map (line cake view).Fig. 2, Fig. 3 insert the front view and the vertical view of the suspension end insulation system of shielded conductor for the traditional transformer coil.Fig. 4, Fig. 5 insert the front view and the vertical view of the suspension end insulation system of shielded conductor for transformer coil of the present invention.
Among the figure: 1-coil current carrying conductor, 2-coil shielded conductor, 3-paperboard strip, 4-Denison paper, 5-crimped paper.
Embodiment
Accompanying drawing is a kind of specific embodiment of the present invention.
Transformer coil of the present invention inserts the suspension end insulation system of shielding conductor; Comprise coil current carrying conductor spaced apart 1 and coil shielded conductor 2; The end of coil shielded conductor connects paperboard strip 3; The suspension end of coil shielded conductor 2, coil shielded conductor 2 all are surrounded by aluminum metallization crimped paper 5 with the outside, contact position of paperboard strip, and the outside of paperboard strip is surrounded by Denison paper 4, and the suspension end of coil shielded conductor 2 is through the corners structure.
Transformer coil of the present invention inserts the suspension end insulation system of shielded conductor, comprises coil current carrying conductor 1, coil shielded conductor 2, paperboard strip 3, Denison paper 4, crimped paper 5.The suspension end insulation system that this transformer coil inserts shielded conductor is to be prone to one of serious hidden danger position that takes place partial discharge and puncture on the transformer; Because in case the outstanding end of transformer coil shielding breaks down, maintenance difficult even can not keep in repair and can only scrap whole winding not only.
The transformer coil shielded conductor is one of effective measures that increase the vertical electric capacity of transformer coil, and has constituted another pole plate of capacitor between the current carrying conductor; Because the coil that particularly electric pressure is high in the transformer coil, the number of turn is many; Vertical electric capacity K is less relatively for lead, causes space factor
(
be the C--direct-to-ground capacitance wherein) relatively large; The starting voltage of coil under the lightning wave effect distributes very far away with final difference in distribution, and along causing concussion on the coil short transverse, voltage to earth in the coil on some wire turn and gradient voltage will increase substantially; In order to limit or avoid the rising of this voltage, the vertical electric capacity that needs to increase coil reduces space factor.Shielded wire coil insert is to improve the vertical capacitance of the most effective methods, its flexibility, operability and manufacturability are good, but the suspension side shield the electric field strength and the starting voltage of partial discharge is difficult to control, especially in Folding Screen is shielded wire turns more and more as the number of inter-segment method of shielding (eg: cross four inner shield - continuous coil).It is a kind of with the suspend structure of the insulation wrapping mode of line end after corners is handled of shielding conductor that this invention provides; Do not handle by the outstanding end of original shielding like this or simple dressing once; Become a kind of standardized insulation system, improved the partial discharge inception voltage at this place, can also reduce adjacent two screens simultaneously and lead the lateral oil road size of covering outstanding end; Prolong the useful life of transformer, reduced manufacturing cost.
Among the figure, W-shielding conductor and paperboard strip width, δ-paperboard strip thickness, r, the outstanding end of R-shielded conductor radius of corner.
Technological measure: 1. end size r, R can accurately not measure, and can lean on the winding operation worker to make smooth with a file the back range estimation.
2. adopt the file of very little tooth.
3. the Denison paper bag is thick is 1.25 times of former insulation.
Claims (1)
1. a transformer coil inserts the suspension end insulation system of shielding conductor; Comprise coil current carrying conductor (1) spaced apart and coil shielded conductor (2); It is characterized by: the end of coil shielded conductor (2) connects paperboard strip (3); The suspension end of coil shielded conductor (2), coil shielded conductor (2) all are surrounded by aluminum metallization crimped paper (5) with the outside, contact position of paperboard strip; The outside of paperboard strip is surrounded by Denison paper (4), and the suspension end of coil shielded conductor (2) is the corners structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100363538A CN102543393A (en) | 2012-02-17 | 2012-02-17 | Suspension end insulation structure with transformer coil inserted with shielding wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100363538A CN102543393A (en) | 2012-02-17 | 2012-02-17 | Suspension end insulation structure with transformer coil inserted with shielding wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102543393A true CN102543393A (en) | 2012-07-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100363538A Pending CN102543393A (en) | 2012-02-17 | 2012-02-17 | Suspension end insulation structure with transformer coil inserted with shielding wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102543393A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050252A (en) * | 2012-12-24 | 2013-04-17 | 保定天威保变电气股份有限公司 | Edge shielding structure of electric reactor magnetic shielding plate |
| CN104916413A (en) * | 2015-06-05 | 2015-09-16 | 卧龙电气集团股份有限公司 | AT power supply 330 kV traction transformer lead capacitive shielding structure |
| CN106158355A (en) * | 2016-09-08 | 2016-11-23 | 中变集团上海变压器有限公司 | A kind of winding method of inner shield coil |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000164435A (en) * | 1998-11-27 | 2000-06-16 | Toshiba Corp | Stationary induction apparatus |
| CN101145438A (en) * | 2007-08-17 | 2008-03-19 | 山东达驰电气股份有限公司 | Transformer coil external wire shielding and insulation processing method |
| CN201732660U (en) * | 2010-07-16 | 2011-02-02 | 江苏上能变压器有限公司 | 50-kilovolt inner screen continuous coil screen line head structure |
| CN202454419U (en) * | 2012-02-17 | 2012-09-26 | 山东达驰电气有限公司 | Suspension end insulation structure for inserting shielding wire into transformer coil |
-
2012
- 2012-02-17 CN CN2012100363538A patent/CN102543393A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000164435A (en) * | 1998-11-27 | 2000-06-16 | Toshiba Corp | Stationary induction apparatus |
| CN101145438A (en) * | 2007-08-17 | 2008-03-19 | 山东达驰电气股份有限公司 | Transformer coil external wire shielding and insulation processing method |
| CN201732660U (en) * | 2010-07-16 | 2011-02-02 | 江苏上能变压器有限公司 | 50-kilovolt inner screen continuous coil screen line head structure |
| CN202454419U (en) * | 2012-02-17 | 2012-09-26 | 山东达驰电气有限公司 | Suspension end insulation structure for inserting shielding wire into transformer coil |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050252A (en) * | 2012-12-24 | 2013-04-17 | 保定天威保变电气股份有限公司 | Edge shielding structure of electric reactor magnetic shielding plate |
| CN103050252B (en) * | 2012-12-24 | 2015-06-10 | 保定天威保变电气股份有限公司 | Edge shielding structure of electric reactor magnetic shielding plate |
| CN104916413A (en) * | 2015-06-05 | 2015-09-16 | 卧龙电气集团股份有限公司 | AT power supply 330 kV traction transformer lead capacitive shielding structure |
| CN106158355A (en) * | 2016-09-08 | 2016-11-23 | 中变集团上海变压器有限公司 | A kind of winding method of inner shield coil |
| CN106158355B (en) * | 2016-09-08 | 2018-02-09 | 中变集团上海变压器有限公司 | A kind of winding method of inner shield coil |
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| PB01 | Publication | ||
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Application publication date: 20120704 |