CN203982990U - A kind of New-type Converter Transformer voltage-regulating winding structure - Google Patents
A kind of New-type Converter Transformer voltage-regulating winding structure Download PDFInfo
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- CN203982990U CN203982990U CN201420455273.0U CN201420455273U CN203982990U CN 203982990 U CN203982990 U CN 203982990U CN 201420455273 U CN201420455273 U CN 201420455273U CN 203982990 U CN203982990 U CN 203982990U
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Abstract
The utility model relates to a kind of New-type Converter Transformer voltage-regulating winding structure, the pressure regulation winding that comprises two series connection: the first winding and the second winding, two pressure regulation windings around iron core arrange from inside to outside and both around on the contrary, on two pressure regulation windings and around wire two ends, all draw tap lead, the two ends of the first winding conducting wire and the second winding conducting wire are all connected to respectively two switches and the first winding conducting wire and the end to end space of the second winding conducting wire order through tap lead and are cascaded, and between two windings, are provided with insulation system.The utility model is simple in structure, designs ingeniously, has both met the demand of the range of regulation that large capacity converter transformer is larger, can fundamentally solve again tap lead and produce the impact causing in large leakage field place and then the safe and stable operation that guarantees converter transformer.
Description
Technical field
The utility model relates to a kind of voltage-regulating winding structure, is specifically related to a kind of New-type Converter Transformer voltage-regulating winding structure.
Background technology
In recent years, along with the continuous increase-volume of DC transmission engineering, large capacity converter transformer more and more became its important crucial power equipment.For meeting the demand of the range of regulation that large capacity converter transformer is larger, pressure regulation winding number of taps is increasing.The large electric current stack of tap lead can produce very large stray field, stray field will produce very strong eddy current in as arm-tie, folder, final stage sheet unshakable in one's determination at core construction part, in folder unshakable in one's determination, the arm-tie short-circuited conducting sleeve that window unshakable in one's determination forms along each, produce powerful induced current, i.e. circulation simultaneously.Circulation in eddy current in structural member, arm-tie and folder all will make converter transformer loss sharply increase, if do not taken measures, probably produce local overheating, affect the safe and stable operation of converter transformer.The precautionary measures that the converter transformer of traditional structure is taked have two kinds: the one, adopt copper compensated loop structure; The 2nd, adopt framework unshakable in one's determination to increase current bypass structure.The method of both just taking " dredging ", produces and can not fundamentally solve tap lead the impact that cause in large leakage field place.
Summary of the invention
For the problems referred to above, the utility model provides a kind of can fundamentally solve the New-type Converter Transformer voltage-regulating winding structure that tap lead produces large stray field and then guarantees converter transformer safe and stable operation.
For addressing the above problem, the technical scheme that the utility model is taked is: a kind of New-type Converter Transformer voltage-regulating winding structure, the pressure regulation winding that comprises two series connection: the first winding and the second winding, two pressure regulation windings around iron core arrange from inside to outside and both around on the contrary, on two pressure regulation windings and around wire two ends, all draw tap lead, the two ends of the first winding conducting wire and the second winding conducting wire are all connected to respectively two switches and the first winding conducting wire and the end to end space of the second winding conducting wire order through tap lead and are cascaded, between two windings, be provided with insulation system.
In the first winding conducting wire, the second winding conducting wire, the sense of current is contrary all the time, has greatly reduced the superimposed current in coil lead, and the stray field causing thus also decreases, and has reduced stray loss and the issuable local overheating of core construction part.Adopt after this scheme, two kinds of structures that play elicitation effect in background technology can be cancelled, and have optimized the project organization of converter transformer.
The first winding conducting wire and the second winding conducting wire refer to respectively and around the wire on the first winding with and around the wire on the second winding herein.Herein voltage regulation coil by two around arranging and be in series from inside to outside around iron core to contrary winding, according to the thinking of this scheme, more multipair be all feasible theoretically after the winding to contrary or winding are arranged above and below series connection, but cannot meet the requirement of engineering application, because capacity is large, tap is many, the outer limit of transportation size is restricted.So converter transformer voltage regulation coil is optimum way by double winding design, inside and outside arrangement.
Because voltage regulation coil tapping range is large, tap turn-to-turn electrical potential difference is larger, therefore increase insulation system between two windings.Described insulation system is the oil duct stay that is arranged at the oil clearance cardboard between the first winding and the second winding and is distributed in oil clearance cardboard both sides.
Above the first winding and the second winding, be positioned at and on electrostatic ring, be provided with public electrostatic ring being provided with electrostatic ring above the second winding.
Electrostatic ring must be positioned over winding and just go up or bottom, and object is in order to shield the point discharge of winding overhang, forms the even electrode in end, whether places, and mainly according to coil Main Insulation Structure of Electric and line end voltage swing thereof, determines.Herein because its adjacent netting twine circle upper end electric pressure in outside is very high, and between voltage regulation coil upper end, just there is larger pressure reduction, have higher electric discharge possibility, need to increase electrostatic ring; And pressure reduction is little between the adjacent windings of two of bottoms, insulation distance is enough large, therefore do not place electrostatic ring.
Described winding adopts individual layer drum type brake or spiral.Voltage regulation coil tapping range is large, and many around wire radical, therefore adopts individual layer drum type brake or spiral two kinds of pattern coilings most effective, and manufacturability is best, and the space needing is minimum, and cost is low.
The utility model is simple in structure, designs ingeniously, has both met the demand of the range of regulation that large capacity converter transformer is larger, can fundamentally solve again tap lead and produce the impact causing in large leakage field place and then the safe and stable operation that guarantees converter transformer.
Accompanying drawing explanation
Fig. 1 is cutaway view of the present utility model;
Fig. 2 is winding connection schematic diagram;
Wherein, the 1, first winding, the 2, second winding, 3, oil clearance cardboard, 4, oil duct stay, 5, electrostatic ring, 6, public electrostatic ring, 7, iron core, 8, switch, the 9, first winding conducting wire, 10 second winding conducting wires.
Embodiment
As shown in Figure 1 and Figure 2, a kind of New-type Converter Transformer voltage-regulating winding structure, comprises the pressure regulation winding of two series connection: the first winding 1 and the second winding 2, two pressure regulation windings adopt individual layer drum type brakes or spiral.
Two pressure regulation windings around unshakable in one's determination 7 arrange from inside to outside and both around on the contrary, on two pressure regulation windings and around wire two ends, all draw tap lead, the two ends of the first winding conducting wire 9 and the second winding conducting wire 10 are all connected to respectively two switches and the first winding conducting wire 9 and the second winding conducting wire 10 end to end spaces of order through tap lead and are cascaded, and between two windings, are provided with insulation system.Described insulation system is the oil duct stay 4 that is arranged at the oil clearance cardboard 3 between the first winding 1 and the second winding 2 and is distributed in oil clearance cardboard 3 both sides.Above the first winding 1 and the second winding 2, be positioned at and on electrostatic ring 5, be provided with public electrostatic ring 6 being provided with electrostatic ring 5 above the second winding 2.
As shown in Figure 2, take pressure regulation tap progression illustrates series system and the dividing potential drop method of two windings as example as 29 grades:
On the first winding 1 and the second winding 2 all and around 7 wires, the tap lead at wire two ends is chained together through two switch 8 spaces, forms circuit as follows: 1-2(1 ')-3 (2 ')-4 (3 ')-5 (4 ')-6 (5 ')-7 (6 ')-8 (7 ')-9 (8 ')-10 (9 ')-11 (10 ')-12 (11 ')-13 (12 ')-14 (13 ')-15 (14 ').
After series connection, obtained 15 tapping points herein, wherein 1 tapping point regulates as polarity, after positive and negative like this reversal, just can obtain 29 taps, realize larger range of regulation, needs to increase on winding and around number of conductors.
Claims (4)
1. a New-type Converter Transformer voltage-regulating winding structure, it is characterized in that: the pressure regulation winding that comprises two series connection: the first winding (1) and the second winding (2), two pressure regulation windings around unshakable in one's determination (7) arrange from inside to outside and both around on the contrary, on two pressure regulation windings and around wire two ends, all draw tap lead, the two ends of the first winding conducting wire (9) and the second winding conducting wire (10) are all connected to respectively two switches and the first winding conducting wire (9) and the end to end space of the second winding conducting wire (10) order through tap lead and are cascaded, between two windings, be provided with insulation system.
2. New-type Converter Transformer voltage-regulating winding structure according to claim 1, is characterized in that: the oil duct stay (4) of described insulation system for being arranged at the oil clearance cardboard (3) between the first winding (1) and the second winding (2) and being distributed in oil clearance cardboard (3) both sides.
3. New-type Converter Transformer voltage-regulating winding structure according to claim 1 and 2, is characterized in that: in the second winding (2) top, be provided with electrostatic ring (5) and in the first winding (1) and the second winding (2) top, be positioned at and on electrostatic ring (5), be provided with public electrostatic ring (6).
4. New-type Converter Transformer voltage-regulating winding structure according to claim 3, is characterized in that: described winding adopts individual layer drum type brake or spiral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420455273.0U CN203982990U (en) | 2014-08-13 | 2014-08-13 | A kind of New-type Converter Transformer voltage-regulating winding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420455273.0U CN203982990U (en) | 2014-08-13 | 2014-08-13 | A kind of New-type Converter Transformer voltage-regulating winding structure |
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| Publication Number | Publication Date |
|---|---|
| CN203982990U true CN203982990U (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420455273.0U Expired - Fee Related CN203982990U (en) | 2014-08-13 | 2014-08-13 | A kind of New-type Converter Transformer voltage-regulating winding structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914007A (en) * | 2016-05-24 | 2016-08-31 | 山东达驰电气有限公司 | Regulating windings of on-load tap changing regulator and pin configuration thereof |
| CN105938756A (en) * | 2016-06-23 | 2016-09-14 | 山东达驰电气有限公司 | Voltage-regulating winding structure of transformer |
| CN109100622A (en) * | 2018-07-11 | 2018-12-28 | 云南电网有限责任公司电力科学研究院 | Installation simulator for the experiment of converter transformer paper oil insulation high pressure characteristics |
| CN112216493A (en) * | 2020-09-27 | 2021-01-12 | 山东电力设备有限公司 | Lead-out structure of large-current multi-tap coil |
| WO2024131178A1 (en) * | 2022-12-21 | 2024-06-27 | 吴江变压器有限公司 | Multi-tap adjustment mechanism, adjustment method therefor, and application thereof |
-
2014
- 2014-08-13 CN CN201420455273.0U patent/CN203982990U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914007A (en) * | 2016-05-24 | 2016-08-31 | 山东达驰电气有限公司 | Regulating windings of on-load tap changing regulator and pin configuration thereof |
| CN105938756A (en) * | 2016-06-23 | 2016-09-14 | 山东达驰电气有限公司 | Voltage-regulating winding structure of transformer |
| CN109100622A (en) * | 2018-07-11 | 2018-12-28 | 云南电网有限责任公司电力科学研究院 | Installation simulator for the experiment of converter transformer paper oil insulation high pressure characteristics |
| CN112216493A (en) * | 2020-09-27 | 2021-01-12 | 山东电力设备有限公司 | Lead-out structure of large-current multi-tap coil |
| WO2024131178A1 (en) * | 2022-12-21 | 2024-06-27 | 吴江变压器有限公司 | Multi-tap adjustment mechanism, adjustment method therefor, and application thereof |
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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: 20141203 Termination date: 20180813 |
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| CF01 | Termination of patent right due to non-payment of annual fee |