CN102543397A - Ultrahigh-voltage large-capacity split-winding type transformer - Google Patents
Ultrahigh-voltage large-capacity split-winding type transformer Download PDFInfo
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- CN102543397A CN102543397A CN2010106055137A CN201010605513A CN102543397A CN 102543397 A CN102543397 A CN 102543397A CN 2010106055137 A CN2010106055137 A CN 2010106055137A CN 201010605513 A CN201010605513 A CN 201010605513A CN 102543397 A CN102543397 A CN 102543397A
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Abstract
The invention relates to an ultrahigh-voltage large-capacity split-winding type transformer. A voltage adjusting coil is split in a radial direction into two coils with a same number of turns, which are respectively distributed outside high voltage coils and low voltage coils and form a coil arrangement which takes the high voltage coil as a center and is completely symmetrical in a radial direction; an end outlet wire structure is adopted as a lateral outlet wire of the high voltage coil; the winding direction of the voltage adjusting coil is a spiral winding direction, and the winding directions of two voltage adjusting coils are opposite; a first low voltage coil in the low voltage coils is a double-layer spiral structure and is led out axially; a second low voltage coil in the low voltage coils is a single-layer spiral structure and is led out radially; all the low voltage coils are led out at the low voltage side of a transformer body. According to the invention, a large-capacity double-split-winding type transformer with a special coil arrangement mode is designed, high-voltage impedance and two low-voltage impedances always keep close to each other under any tapping condition, and a heart type structure is adopted so that the manufacturing of the large-capacity double-split-winding type transformer for a power generator becomes possible.
Description
Technical field
The present invention relates to technical field of transformer manufacturing, a kind of specifically extra-high-voltage large-capacity transf.
Background technology
Increase along with the installed capacity of generator separate unit; The single transformer capacity of configuration is also increasing; Present most of power plant all adopts the configuration mode of the corresponding one group of transformer of a generator; If adopt two generators to utilize the configuration of one group of transformer (i.e. two machines, one change mode), line loop thereby reduce, will significantly reduce power plant construction and operation expense.But two machines one become or the transformer with split winding of multimachine one change also is not widely used in the power plant as main transformer.The application of transformer with split winding in power plant, electric substation also only limits to do station transformer and starting spare transformer.This is because most of in the world transformer factory all adopts heart type structure at present, and utilizes the big capacity of heart type structure manufacturing (more than the 120000kVA) transformer with split winding also to have certain designed and application problem at present.If big capacity transformer with split winding adopts the axial split structure, the anti-short circuit capability of transformer coil is low, and security of products is relatively poor; If adopt traditional width of cloth to splitted construction, will in two generator output loops, produce bigger circulating current, jeopardize device security.
Fig. 1 (a), 1 (b) are respectively the transformer with split winding coil arrangement figure of conventional axial and radial division; Like Fig. 1 (a) is the structure of axial split, and when two generator for electricity generation capacity were inconsistent, the transformer anti-short circuit capability was poor; Laterally leakage field is serious, and security of products is relatively poor; 1 (b) be the width of cloth to splitted construction, be difficult to guarantee that high pressure-low pressure 1 is consistent or approaching at the resistance value of each tap with 2 short circuits of high pressure-low pressure, when non-principal tapping moves, will in two generator output loops, produce circulating current, jeopardize device security.
On-load voltage regulation transformer with split winding for big capacity, superhigh pressure (more than the 220kV), two machines one become if adopt heart type structure, adopts the perhaps traditional width of cloth of axial split to splitted construction, and security of products all is not easy to guarantee.
Summary of the invention
The difference of the short-circuit impedance that the on-load voltage regulation transformer with split winding that becomes to big capacity, superhigh pressure, two machines one in the prior art exists; In two generator output loops, produce bigger circulating current; Even jeopardize deficiencies such as device security; The technical problem that the present invention will solve provides a kind of short-circuit strength problem that solves transformer that both satisfied easily, can satisfy the short-circuit impedance value all approaching extra-high-voltage large-capacity transf of transformer high-voltage coil under any tap again.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is:
The big capacity transformer with split winding of superhigh pressure of the present invention, the voltage regulation coil width of cloth are distributed in high-tension coil and the low-voltage coil outside respectively to being split into identical two of the number of turn, and forming with the high-tension coil is the center, radially the coil arrangement of symmetry fully.
The end outlet structure is adopted in the outlet of high-tension coil side.
Said voltage regulation coil be spiral around to, two voltage regulation coils around on the contrary.
First low-voltage coil in the low-voltage coil is a double-layer spiral formula structure, axially lifts one's head, and second low-voltage coil in the low-voltage coil is the individual layer sped structure, and radial lifting one's head, all low-voltage coils are lifted one's head and all drawn in device body low-pressure side.
The present invention has following beneficial effect and advantage:
1. the present invention has designed a kind of two transformer with split windings of big capacity of special coil arrangement mode, and the impedance that has realized high pressure and two low pressure all keeps close under any tap, make the employing heart type structure, and making the two division generator transformers of big capacity becomes possibility.
Description of drawings
Fig. 1 tradition transformer with split winding coil arrangement mode;
Fig. 2 width of cloth of the present invention is to transformer with split winding coil arrangement mode;
Fig. 3 width of cloth of the present invention partly passes through operation leakage field component Butut to transformer with split winding;
Fig. 4 voltage regulation coil of the present invention around to and lift one's head the connection sketch map.
Wherein, LV1 is first low-voltage coil; HV is a high-tension coil; LV2 is second low-voltage coil, and TV1 is first voltage regulation coil, and TV2 is second voltage regulation coil, 1. is unshakable in one's determination.
Embodiment
Below in conjunction with accompanying drawing the embodiment of present technique scheme is described in detail.
In order to adapt to the increase of power plant unit generate output; Raising transformer anti-short circuit capability is orientated this two machines, one variant transformer with split winding the structure of the width of cloth to division as, the voltage regulation coil number of turn is split be divided into complete two parts symmetrical; The coil arrangement mode is as shown in Figure 2; This just forms with the high-tension coil is the center, the coil arrangement of symmetry combination fully: during HV-LV1 (high-tension coil is to first low-voltage coil) operation, and coil arrangement TV1-LV1-HV-TV2; During HV-LV2 (high-tension coil is to second low-voltage coil) operation, coil arrangement TV1-HV-LV2-TV2.
When two low-voltage coil capacity were identical, HV-LV1 and HV-LV2 leakage field group fully symmetry were as shown in Figure 3, though high-tension coil in any tap because the symmetry on the coil arrangement structure, two leakage field groups are symmetry fully.So just guaranteed that HV-LV1 or HV-LV2 when operation is the most just or during minus tapping, both short-circuit impedance values are near equating.Wherein, A1 is that HV-LV1 moves plus tapping leakage field figure; A2 is that HV-LV1 moves specified tap leakage field figure; A3 is that HV-LV1 moves minus tapping leakage field figure; A11 is that HV-LV2 moves plus tapping leakage field figure; A21 is that HV-LV2 moves specified tap leakage field figure; A31 is that HV-LV2 moves minus tapping leakage field figure.
Because the present invention adopts the width of cloth to division, high-tension coil is not an exterior loop, lifts one's head difficulty; Simultaneously, split the branch voltage regulation coil, pressure regulation is lifted one's head has increased by one times, if lifting one's head of numerous coils arranged unreasonablely, not only is difficult to satisfy the electric insulation distance of superhigh pressure winding protruding head to other parts, also will cause winding protruding head various, mixed and disorderly, the phenomenon that is difficult to connect.Therefore the present invention has been done further improvement.
(1) through changing coil winding-direction, rationally confirm the loop construction form to reach simplification, connect the purpose of winding protruding head easily.As shown in Figure 4; Voltage regulation coil of the present invention around to and lift one's head and connect sketch map (is example with high pressure ± 5 grade pressure regulation); Two voltage regulation coils all adopt spiral; The first voltage regulation coil TV1 adopts a left side around to, the expression with
, the second voltage regulation coil TV2 adopt right around to; Use:
expression; The connection of lifting one's head with two voltage regulation coil bottoms correspondence just is equivalent to two-layer spiral coil, as long as the upper coil outlet is drawn; Be equivalent to reduce half the voltage regulation coil and lifted one's head, simplified winding protruding head greatly.
(2) confirm rational winding protruding head position, to guarantee the distance of high pressure end line.The end outlet structure is adopted in the outlet of high-tension coil superhigh pressure side, and device body high-pressure side is only drawn pressure regulation and lifted one's head and the superhigh pressure outlet; The first low-voltage coil LV1 adopts the structure of two-layer spiral coil, adopts and axially lifts one's head, and the second low-voltage coil LV2 adopts the structure of individual layer helical winding, adopts the width of cloth to lifting one's head, and two low pressure are lifted one's head and all drawn in device body low-pressure side.Reasonably loop construction, to lift one's head position and the mode of lifting one's head be the insulation distance that guarantees the superhigh pressure end line, solve the leakage field problems of excessive heat that great current lead wire causes and lay a good foundation.
The present invention mainly through selecting the version of the width of cloth to division, has improved the transformer anti-short circuit capability, and the especially division impedance of transformer has increased 8 times than the structure of axial split, and the coefficient of safety of transformer aspect Short Circuit withstand increases at double.Secondly design through ampere-turns such as all coils are distributed, reduce coil self and mutually between produce axially, electric power radially.In addition, also structure and the process with the Short Circuit withstand transformer all is applied on this project, improves the anti-short circuit capability of whole transformer.
Claims (4)
1. big capacity transformer with split winding of superhigh pressure is characterized in that: the voltage regulation coil width of cloth is distributed in high-tension coil and the low-voltage coil outside respectively to being split into identical two of the number of turn, and forming with the high-tension coil is the center, radially the coil arrangement of symmetry fully.
2. by the big capacity transformer with split winding of the described superhigh pressure of claim 1, it is characterized in that: the end outlet structure is adopted in the outlet of high-tension coil side.
3. by the big capacity transformer with split winding of the described superhigh pressure of claim 1, it is characterized in that: said voltage regulation coil be spiral around to, two voltage regulation coils around on the contrary.
4. by the big capacity transformer with split winding of the described superhigh pressure of claim 1; It is characterized in that: first low-voltage coil (LV1) in the low-voltage coil is double-layer spiral formula structure; Axially lift one's head; Second low-voltage coil (LV2) in the low-voltage coil is the individual layer sped structure, and radial lifting one's head, all low-voltage coils are lifted one's head and all drawn in device body low-pressure side.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010605513.7A CN102543397B (en) | 2010-12-24 | 2010-12-24 | Ultrahigh-voltage large-capacity split-winding type transformer |
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| CN201010605513.7A CN102543397B (en) | 2010-12-24 | 2010-12-24 | Ultrahigh-voltage large-capacity split-winding type transformer |
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| CN102543397A true CN102543397A (en) | 2012-07-04 |
| CN102543397B CN102543397B (en) | 2014-04-23 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065776A (en) * | 2012-12-27 | 2013-04-24 | 吴江市变压器厂有限公司 | Winding structure of transformer |
| CN103779051A (en) * | 2012-10-18 | 2014-05-07 | 特变电工股份有限公司 | Dry type transformer for photovoltaic power generation |
| CN103811160A (en) * | 2012-11-12 | 2014-05-21 | 特变电工股份有限公司 | Four split transformer |
| CN107293395A (en) * | 2016-04-11 | 2017-10-24 | 特变电工沈阳变压器集团有限公司 | A kind of radial transformer with split windings of 500kV |
| CN109616295A (en) * | 2019-01-11 | 2019-04-12 | 浙江宝威电气有限公司 | A kind of capacitance-adjustable transformer of three-phase linear arranged type Dy (Yz) connection |
| CN110233027A (en) * | 2019-05-29 | 2019-09-13 | 南通晓星变压器有限公司 | A kind of transformer with split winding |
| CN111781534A (en) * | 2020-06-04 | 2020-10-16 | 湖南大学 | Method and device for testing short-circuit resistance of transformer |
| CN111816415A (en) * | 2020-06-19 | 2020-10-23 | 山东电力设备有限公司 | Energy dissipation protection transformer for flexible direct current transmission |
| CN112992502A (en) * | 2021-03-22 | 2021-06-18 | 保定天威保变电气股份有限公司 | Novel 220kV high-capacity split on-load voltage regulation marine step-up transformer |
| CN114005660A (en) * | 2021-12-31 | 2022-02-01 | 上海电气集团(张家港)变压器有限公司 | Outgoing line structure of high-voltage winding of transformer and transformer |
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| JPH03204913A (en) * | 1989-12-30 | 1991-09-06 | Hitachi Ltd | High frequency transformer |
| JPH0645161A (en) * | 1992-07-27 | 1994-02-18 | Meidensha Corp | Transformer winding wire |
| CN201262886Y (en) * | 2008-09-16 | 2009-06-24 | 保定天威集团有限公司 | Tri-loop loaded voltage regulating transformer |
| CN201584280U (en) * | 2009-10-30 | 2010-09-15 | 保定天威集团有限公司 | Arrangement structure of split winding type transformer |
| CN201594453U (en) * | 2010-02-03 | 2010-09-29 | 杭州钱江电气集团股份有限公司 | Double-bundle double zigzag connection radial split winding type transformer coil |
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2010
- 2010-12-24 CN CN201010605513.7A patent/CN102543397B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH03204913A (en) * | 1989-12-30 | 1991-09-06 | Hitachi Ltd | High frequency transformer |
| JPH0645161A (en) * | 1992-07-27 | 1994-02-18 | Meidensha Corp | Transformer winding wire |
| CN201262886Y (en) * | 2008-09-16 | 2009-06-24 | 保定天威集团有限公司 | Tri-loop loaded voltage regulating transformer |
| CN201584280U (en) * | 2009-10-30 | 2010-09-15 | 保定天威集团有限公司 | Arrangement structure of split winding type transformer |
| CN201594453U (en) * | 2010-02-03 | 2010-09-29 | 杭州钱江电气集团股份有限公司 | Double-bundle double zigzag connection radial split winding type transformer coil |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779051A (en) * | 2012-10-18 | 2014-05-07 | 特变电工股份有限公司 | Dry type transformer for photovoltaic power generation |
| CN103811160A (en) * | 2012-11-12 | 2014-05-21 | 特变电工股份有限公司 | Four split transformer |
| CN103065776A (en) * | 2012-12-27 | 2013-04-24 | 吴江市变压器厂有限公司 | Winding structure of transformer |
| CN107293395A (en) * | 2016-04-11 | 2017-10-24 | 特变电工沈阳变压器集团有限公司 | A kind of radial transformer with split windings of 500kV |
| CN109616295A (en) * | 2019-01-11 | 2019-04-12 | 浙江宝威电气有限公司 | A kind of capacitance-adjustable transformer of three-phase linear arranged type Dy (Yz) connection |
| CN110233027A (en) * | 2019-05-29 | 2019-09-13 | 南通晓星变压器有限公司 | A kind of transformer with split winding |
| CN111781534A (en) * | 2020-06-04 | 2020-10-16 | 湖南大学 | Method and device for testing short-circuit resistance of transformer |
| CN111816415A (en) * | 2020-06-19 | 2020-10-23 | 山东电力设备有限公司 | Energy dissipation protection transformer for flexible direct current transmission |
| CN111816415B (en) * | 2020-06-19 | 2023-04-07 | 山东输变电设备有限公司 | Energy dissipation protection transformer for flexible direct current transmission |
| CN112992502A (en) * | 2021-03-22 | 2021-06-18 | 保定天威保变电气股份有限公司 | Novel 220kV high-capacity split on-load voltage regulation marine step-up transformer |
| CN112992502B (en) * | 2021-03-22 | 2022-08-12 | 保定天威保变电气股份有限公司 | 220kV high-capacity split on-load voltage regulation marine step-up transformer |
| CN114005660A (en) * | 2021-12-31 | 2022-02-01 | 上海电气集团(张家港)变压器有限公司 | Outgoing line structure of high-voltage winding of transformer and transformer |
| CN114005660B (en) * | 2021-12-31 | 2022-04-05 | 上海电气集团(张家港)变压器有限公司 | Outgoing line structure of high-voltage winding of transformer and transformer |
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| CN102543397B (en) | 2014-04-23 |
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